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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 2896. Отображено 100.
22-03-2012 дата публикации

Tissue ablation with irreversible electroporation

Номер: US20120071874A1
Автор: Boris Rubinsky, Rafael Davalos
Принадлежит: UNIVERSITY OF CALIFORNIA

A new method for the ablation of undesirable tissue such as cells of a cancerous or non-cancerous tumor is disclosed. It involves the placement of electrodes into or near the vicinity of the undesirable tissue through the application of electrical pulses causing irreversible electroporation of the cells throughout the entire area of the undesirable tissue. The electric pulses irreversibly permeate the cell membranes, thereby invoking cell death. The irreversibly permeabilized cells are left in situ and are removed by the body immune system. The amount of tissue ablation achievable through the use of irreversible electroporation without inducing thermal damage is considerable.

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Номер записи: 1
10-05-2012 дата публикации

Surgical instrument with modular end effector and detection feature

Номер: US20120116266A1
Автор: Gavin M. Monson, Kevin L. Houser
Принадлежит: Ethicon Endo Surgery Inc

An apparatus comprises a handle assembly, a first transmission assembly, and a second transmission assembly. The first transmission assembly is in selective communication with the handle assembly and is operable to deliver energy to a surgical site. The second transmission assembly is in selective communication with the handle assembly and is operable to deliver energy to a surgical site. The first transmission assembly and the second transmission assembly are operable in different modalities, such as ultrasonic and RF electrosurgical modalities, using the same handle assembly.

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Номер записи: 2
10-05-2012 дата публикации

Medical device usage data processing

Номер: US20120116367A1
Автор: Aron O. Zingman, Ashvani K. Madan, Donna L. Korvick, Foster B. Stulen, John W. Willis, Kevin L. Houser, Timothy G. Dietz
Принадлежит: Ethicon Endo Surgery Inc

A surgical instrument includes a handle assembly having a lower portion with a hingedly attached end piece. When open, the end piece allows for receipt of a data card in a lower portion aperture. When closed, the end piece covers the aperture. In another version, the aperture is configured to receive a data card and battery pack assembly. Information is readable from and to the data card to measure a number of minutes the instrument was used during a procedure. Such information is communicated via wired or wireless communication to another device to determine a payment for the number of minutes used. Minutes are buyable from the device and writable onto the data card prior to insertion of the card into the instrument. In another version, a testing sequence is used in saline or via a tissue proxy to test the functionality of an instrument prior to a procedure.

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Номер записи: 3
10-05-2012 дата публикации

Surgical instrument with charging station and wireless communication

Номер: US20120116381A1
Автор: Daniel W. Price, Gavin M. Monson, Hitesh Jain, Kevin L. Houser
Принадлежит: Ethicon Endo Surgery Inc

An apparatus comprises an electrically power surgical instrument having a handle assembly. The apparatus also comprises a communication device positioned within the handle assembly. The communication device is operable to communicate with at least a portion of the electrically powered surgical instrument. The apparatus further comprises an external device in wireless communication with the communication device. The external device is operable to receive information from the communication device and the external device is operable to provide an output viewable to the user.

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Номер записи: 4
17-05-2012 дата публикации

Power Glove

Номер: US20120123405A1
Автор: Jason L. Craig, Tony Moua
Принадлежит: TYCO HEALTHCARE GROUP LP

A system and method for powering a wireless electrosurgical device using a powered glove. The powered glove includes at least a conductive pad on a finger and a thumb. The glove is connected to a generator and supplies power to the wireless electrosurgical device when at least two conductive pads touch conductive buttons on the wireless device. The user selects the operating mode by selecting different combination of conductive buttons and/or switches on the wireless device. The generator senses a voltage drop across a circuit within the electrosurgical device to determine the operating mode. The generator then supplies the RF energy based on the selected operating mode via the glove to the wireless device.

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Номер записи: 5
21-06-2012 дата публикации

System for controlling tissue ablation using temperature sensors

Номер: US20120157890A1
Автор: Andres Claudio Altmann, Assaf Govari, Yaron Ephrath
Принадлежит: Biosense Webster Israel Ltd

Body tissue ablation is carried out by inserting a probe into a body of a living subject, urging the probe into contact with a tissue in the body, generating energy at a power output level, and transmitting the generated energy into the tissue via the probe. While transmitting the generated energy the ablation is further carried out by determining a measured temperature of the tissue and a measured power level of the transmitted energy, and controlling the power output level responsively to a function of the measured temperature and the measured power level. Related apparatus for carrying out the ablation is also described.

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Номер записи: 6
30-08-2012 дата публикации

System and Method for Detecting and Suppressing Arc Formation During an Electrosurgical Procedure

Номер: US20120220997A1
Автор: Mark A. Johnston
Принадлежит: TYCO HEALTHCARE GROUP LP

A method for suppressing arc formation during an electrosurgical tissue treatment procedure includes the steps of supplying pulsed current from an energy source to tissue and measuring the pulsed current supplied from the energy source. The method also includes the steps of comparing an instantaneous measured pulse to a predetermined threshold and controlling the pulsed current supplied from the energy source based on the comparison between the instantaneous measured pulse and the predetermined threshold.

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Номер записи: 7
29-11-2012 дата публикации

Treatment apparatus with frequency controlled treatment depth

Номер: US20120303012A1
Автор: Greg Leyh
Принадлежит: Cutera Inc

An electro-surgical system actively maintains an optimal heating profile at the electrode-patient contact surface under varying load resistivity, thereby reducing the risk of burns and maximizing patient comfort. A set of temperature sensors is integrated within the electrode assembly of the electrosurgical system. The sensors are located both at the center and the edges of the electrode. The sensors are thermally coupled to the electrode-patient contact surface. As RF power is applied, a control loop monitors the temperature at the center and edges of the electrode. If the edge temperature of the electrode is high compared to its center temperature, then the control loop increases the operating frequency, effectively driving heat towards the center of the electrode. Conversely, if the edge temperature of the electrode is low compared to its center temperature, then the control loop decreases the operating frequency, effectively driving heat towards the edges of the electrode.

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Номер записи: 8
06-12-2012 дата публикации

Medical device

Номер: US20120310227A1
Автор: Yukitoshi Katou
Принадлежит: Terumo Corp

A medical device includes a steering unit at a proximal portion of a catheter to steer operations of a heating unit at a distal portion of the catheter. The steering unit includes a main body portion interlocked with the catheter; a slide portion interlocked with the heating unit and slidable relative to the main body portion; a guide unit interlocked with the main body portion and fixed to the slide portion for movement therewith; and an input connector electrically connected with the heating unit and connectable with an output connector for supplying electric energy to the heating unit. The guide unit hinders connection between the input connector and the output connector. A cutout portion enables connection between the input and output connectors when the guide unit moves with respect to the main body portion and the heating unit moves to a position at which the biological tissue is heatable.

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Номер записи: 9
31-01-2013 дата публикации

Test jig for ablator

Номер: US20130027069A1
Автор: Andres Claudio Altmann, Assaf Govari, Tom Sagie Stern, Yaron Ephrath
Принадлежит: Biosense Webster Israel Ltd

In techniques for testing and calibrating an ablator, a tissue probe emulator is connectable to a tissue ablator being tested. The emulator includes a temperature sensor, a thermoelectric unit operative to vary a temperature sensed by the temperature sensor, an adjustable electrical load, electrical control circuitry connected to the thermoelectric unit and the electrical load and operative to independently adjust the electrical load and an output of the thermoelectric unit. The emulator conveys signals emitted by the temperature sensor to the tissue ablator and conveys an ablation energy output of the tissue ablator to the electrical load.

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Номер записи: 10
25-04-2013 дата публикации

Litz wire battery powered device

Номер: US20130103023A1
Автор: Alan E. Green, David I. Ruddenklau, David J. Stocks, Gavin M. Monson, Gordon J. Leather, John Hefin Bowen Evans, Paul C. Roberts, Robin M. Lee
Принадлежит: Ethicon Endo Surgery Inc

A medical instrument is disclosed. The medical instrument includes a housing and a handle for gripping by a user, an end effector coupled to the handle and having at least one electrical contact, a battery, and a radio frequency (RF) generation circuit coupled to and operated by the battery. The RF generation circuit is operable to generate an RF drive signal and to provide the RF drive signal to the at least one electrical contact, wherein the RF generation circuit is supported by the housing. The RF generation circuit includes a resonant circuit that includes at least one inductive element constructed of litz wire.

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Номер записи: 11
02-05-2013 дата публикации

High-frequency surgical device

Номер: US20130110103A1
Автор: Andreas Karrasch, Ilja Aßmus, Lutz Kersten, Stefan SCHIDDEL, Timo STRAUSS, Uwe Fischer
Принадлежит: OLYMPUS Winter and Ibe GmbH

The invention relates to a high-frequency surgical device for generating high-frequency energy for cutting and/or coagulating biological tissue. The high-frequency surgical device comprises an application part being electrically connectable to an electrosurgical instrument having at least one activation switch, an intermediary power circuit galvanically separated from the application part, a DC power source which, in operation, provides in the application part at least one DC voltage, a with the DC voltage source electrically connected control signal generator which, in operation, generates in the application part ( 10 ) from the DC voltage an alternating control signal with a predetermined switching frequency, and a to the control signal generator electrically connected evaluation unit being electrically connectable to the activation switch of the instrument and which, when the activation switch is actuated, transmits a with the switching frequency oscillating activation signal to the input power circuit.

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Номер записи: 12
09-05-2013 дата публикации

SYSTEMS AND METHODS FOR LIMITING JOINT TEMPERATURE

Номер: US20130116689A1
Автор: DeCou Robert, Knudsen Katherine, Marion Duane W.
Принадлежит: ARTHROCARE CORPORATION

Joint temperature monitoring and control systems and methods are described herein in which the temperature of a fluid within a body or joint space is determined and/or monitored despite the energy generated during treatment by an ablation probe. One or more temperature sensors are positioned along the probe proximally of the electrode assembly and measure the temperature of an electrically conductive fluid without being overly influenced by the surgical effect occurring proximate the electrode assembly. The controller coupled to the probe can also be configured to set temperature limits and treatment times as well as moderating joint temperature by altering the electrically conductive fluid flow. 1. An apparatus for treating tissue at a target site within a body or joint space comprising: an active electrode terminal disposed near the distal end;', 'a return electrode;', 'a temperature sensor spaced away from the active electrode and the return electrode for measuring the temperature of an electrically conductive fluid located in the body or joint space;, 'an electrosurgical probe having a shaft with a distal end and a proximal end, the probe further comprisinga high frequency power supply, the high frequency power supply coupled to the active electrode terminal to supply an electrical energy output between the active electrode terminal and the return electrode; anda microprocessor for controlling the high frequency power supply in accordance with an output of the temperature sensor, wherein the microprocessor is programmed with a series of temperature limits, and is configured to generate an alarm if the temperature sensor measures a fluid temperature in excess of a first limit, and to reduce or deactivate the electrical energy output if the temperature sensor measures a fluid temperature in excess of a second limit.2. The apparatus of wherein the temperature sensor is spaced a distance away from the distal tip.3. The apparatus of wherein the distance is at least 5 ...

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Номер записи: 13
16-05-2013 дата публикации

Battery shut-off algorithm in a battery powered device

Номер: US20130123776A1
Автор: Alan E. Green, Clive Styler, David A. Snowdon, David I. Ruddenklau, David J. Stocks, Gavin M. Monson, Gordon J. Leather, Gregory A. Trees, John Hefin Bowen Evans, Paul C. Roberts, Paulo Alexandre de Torre Pinheiro, Robin M. Lee
Принадлежит: Ethicon Endo Surgery Inc

A medical instrument is disclosed. The medical instrument includes at least one electrical contact, a battery, a radio frequency (RF) generation circuit coupled to and operated by the battery and operable to generate an RF drive signal and to provide the RF drive signal to the at least one electrical contact, and a battery discharge circuit coupled to the battery. A processor is coupled to the battery discharge circuit and a memory is coupled to the processor. The memory stores machine executable instructions that when executed cause the processor to monitor activation of the RF generation circuit and disable the RF generation circuit when the RF drive signal is fired a predetermined number of times. The medical instrument may include an activation switch and/or a disposal switch supported by the housing.

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Номер записи: 14
13-06-2013 дата публикации

Endoscope

Номер: US20130150667A1
Автор: Takeshi Ogura, Toshihiro Hadano, Yuki Mitamura
Принадлежит: OLYMPUS MEDICAL SYSTEMS CORP

An endoscope of an embodiment includes: a distal end rigid member made of resin; a channel tube connecting member which has a distal end side fitted and fixed in the distal end rigid member and is formed in a tubular shape using a conductive member, and which includes a stepped portion on a part of an outer circumferential surface in a longitudinal direction; and a bending piece member which is formed in a tubular shape using a conductive member and arranged just behind a rear end side of the distal end rigid member, and which has a protruding portion protruding and elastically-deformed toward an inner circumferential surface side, wherein when the bending piece member is fixed to the distal end rigid member with the channel tube connecting member being housed inside thereof, the protruding portion contacts the outer circumferential surface of the channel tube connecting member to establish conduction.

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Номер записи: 15
27-06-2013 дата публикации

Impedance responsive ablation rf driving for moderating return electrode temperature

Номер: US20130165919A1
Автор: Gordon Epstein
Принадлежит: Halt Medical Inc

The inventive method for ablating a tissue mass associated with a human or animal patient being treated comprises positioning an ablating electrode in a tissue mass to be ablated. A plurality of return electrodes are positioned on the patient. Electrical energy is applied between the return electrodes and the ablating electrode. The temperature of the return electrodes is measured to generate a temperature measurement signal which is used to control ablation current through the return electrodes.

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Номер записи: 16
18-07-2013 дата публикации

RETURN ELECTRODE TEMPERATURE PREDICTION

Номер: US20130184701A1
Автор: Dunning James E.
Принадлежит: COVIDIEN LP

The present disclosure relates to an electrosurgical generator for supplying electrosurgical energy to tissue and methods thereof. The electrosurgical generator includes sensor circuitry, a processing device, and a controller. The type of return electrode pad may be determined automatically. The sensor circuitry is configured to determine one or more characteristics of a patient and/or measure tissue temperature at a return electrode pad site. The processing device is configured to determine a maximum temperature of tissue and calculate real-time predicted temperature at the return electrode pad site. The controller is configured to regulate output of the electrosurgical generator based on one or more characteristics of a patient and the determined maximum temperature. 1. A method for controlling an electrosurgical generator , the method comprising:determining tissue temperature at a return electrode pad site;calculating a maximum temperature of tissue at the return electrode pad site based on at least one characteristic of a patient; andregulating output of an electrosurgical generator based on the tissue temperature and the determined maximum temperature.2. The method according to claim 1 , further comprising:measuring impedance at the at least one return electrode pad; anddetermining the at least one characteristic of the patient based on the measured impedance.3. The method according to claim 1 , further comprising:adjusting the output of the electrosurgical generator to a predetermined level based on the calculated maximum temperature.4. The method according to claim 1 , further comprising:determining a type of the at least one return electrode pad.5. The method according to claim 4 , further comprising:loading at least one variable relating to the output of the electrosurgical generator from a look-up table into the electrosurgical generator based on the type of the at least one return electrode pad; andadjusting the output of the electrosurgical generator ...

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Номер записи: 17
29-08-2013 дата публикации

SYSTEM AND METHOD FOR ASSESSING LESIONS IN TISSUE

Номер: US20130226169A1
Автор: Deno Don Curtis, Miller Stephan P., Paul Saurav, Teplitsky Liane R.
Принадлежит: St. Jude Medical, Atrial Fibrillation Division, Inc.

A method and system for assessing lesion formation in tissue is provided. The system includes an electronic control unit (ECU). The ECU is configured to acquire values for first and second components of a complex impedance between the electrode and the tissue, and to calculate an index responsive to the first and second values. The ECU is further configured to process the ECI to assess lesion formation in the tissue. 1. A guidance system for a catheter , comprising: analyze first and second components of a complex impedance between an electrode and tissue;', 'analyze a state of contact between the electrode and the tissue; and', 'assess at least one lesion site on the tissue according to the first and second complex impedance components and according to the state of contact; and, 'an electronic control unit (ECU) configured toa display device, electrically coupled with said ECU, configured to provide feedback to a user for manipulating the catheter according to said lesion site assessment.2. The guidance system of claim 1 , wherein the state of contact comprises one or more of a contact pressure claim 1 , a contact force claim 1 , a temperature claim 1 , a change in temperature claim 1 , and a fluid flow rate.3. The guidance system of claim 1 , wherein said ECU is configured to assess the at least one lesion site by calculating an index responsive to at least the first and second complex impedance components and to the state of contact.4. The guidance system of claim 3 , wherein said ECU is configured to assess the at least one lesion site by calculating an index rate by:receiving first location coordinates corresponding to a first location of the electrode and second location coordinates corresponding to a second location of the electrode;calculating an index change between a first index calculated responsive to first and second components of a first complex impedance acquired while the electrode is located at the first location and a second index calculated ...

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Номер записи: 18
26-09-2013 дата публикации

Multiple Parameter Fault Detection in Electrosurgical Instrument Shields

Номер: US20130253502A1
Автор: Aronow Kurt Albert, Boyle Don R., Newton David
Принадлежит: ENCISION, INC.

A system and method for detecting faults within an electrosurgical instrument having a shield and an active electrode uses multiple possible fault conditions. In one embodiment the monitoring system comprises an electrosurgical generator coupled to the electrosurgical instrument and adapted to deliver power to the active electrode of the electrosurgical instrument, monitoring circuitry coupled to the electrosurgical generator and the electrosurgical instrument. 1. A method of detecting faults within a shielded electrosurgical instrument , the shielded electrosurgical instrument having an active electrode , the method comprising: an active voltage in the active electrode;', 'a current in the active or return electrodes;', 'power in the electrosurgical instrument shield;, 'sensing at least two of whether a resistance fault exists;', 'whether one or more current faults exists;', 'whether a power fault exists;', 'whether a capacitance fault exists; and, 'determining at least two ofaltering power delivery to the active electrode if any of the resistance fault, current faults, power fault, or capacitance faults exist.2. The method of claim 1 , wherein determining whether a resistance fault exists comprises determining whether the expression WR>VKtrue claim 1 , wherein Vis equal to the mean claim 1 , squared claim 1 , active electrode voltage over a frame claim 1 , wherein Wis equal to the mean claim 1 , real shield power over a frame claim 1 , wherein Ris equal to the resistance below which a resistance fault is tripped claim 1 , and wherein Kis equal to a scaling constant.3. The method of claim 1 , wherein determining whether a current fault exists comprises determining whether the expression I>Itrue claim 1 , wherein Iis equal to the mean claim 1 , squared shield current over a frame claim 1 , and wherein Iis equal to a constant representing the square of current below which a current fault is tripped.4. The method of claim 1 , wherein determining whether a capacitance ...

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Номер записи: 19
21-11-2013 дата публикации

SYSTEMS AND METHODS FOR ACTIVATING TRANSDUCERS

Номер: US20130310702A1
Автор: Bisalputra Danai, Louie Roxanne Wai Tak, Reinders Daniel Martin, Wienkam Daniel Robert
Принадлежит: KARDIUM INC.

Transducer-based systems and methods may be configured to display a graphical representation of a transducer-based device, the graphical representation including graphical elements corresponding to transducers of the transducer-based device, and also including between graphical elements respectively associated with a set of the transducers and respectively associated with a region of space between the transducers of the transducer-based device. Selection of graphical elements and/or between graphical elements can cause activation of the set of transducers associated with the selected elements. Transducer activation characteristics, such as initiation time, activation duration, activation sequence, and energy delivery characteristics, can vary based on numerous factors. Visual characteristics of graphical elements and between graphical elements can change based on an activation-status of the corresponding transducers. Activation requests for a set of transducers can be denied if it is determined that a transducer in the set of transducers is unacceptable for activation. 1. A transducer-activation system comprising:a data processing device system;an input-output device system communicatively connected to the data processing device system; anda memory device system communicatively connected to the data processing device system and storing a program executable by the data processing device system, the program comprising:selection instructions configured to cause reception of a selection from the input-output device system of at least some of a plurality of pairs of adjacent ones of transducers in a distribution of the transducers carried by a transducer-based device, the distribution positionable in a bodily cavity, and the at least some of the plurality of pairs of adjacent ones of the transducers in the distribution including at least a first pair of adjacent ones of the transducers in the distribution and a second pair of adjacent ones of the transducers in the ...

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Номер записи: 20
28-11-2013 дата публикации

Enhanced control systems including flexible shielding and support systems for electrosurgical applications

Номер: US20130317496A1
Автор: David Newton, Warren Taylor
Принадлежит: Encision Inc

A surgical system comprises a device adapted to deliver a plurality of surgical instruments to a site within a patient's body, a first surgical instrument comprising an active electrode probe, a second surgical instrument for performing a non-electrosurgical procedure, a conductive shield surrounding the active electrode probe of the first surgical instrument and connected to a reference potential, and a cold instrument monitor connected to the second surgical instrument and to the reference potential.

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Номер записи: 21
19-12-2013 дата публикации

Systems and methods for detecting channel faults in energy delivery systems

Номер: US20130336356A1
Автор: Duane Ellis TUMLINSON, Gregory James Martin
Принадлежит: MEDTRONIC ABLATION FRONTIERS LLC

A method of detecting a thermocouple short circuit in a medical device, including obtaining a first temperature measurement from a thermocouple of the medical device; obtaining a second temperature measurement from the thermocouple; calculating a rate of change over time between the first and second temperature measurements; comparing the calculated rate of change over time to a predefined rate of change over time threshold; and generating an indication of a thermocouple short circuit based at least in part on the comparison.

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Номер записи: 22
26-12-2013 дата публикации

ELECTROPHYSIOLOGY ELECTRODE HAVING MULTIPLE POWER CONNECTIONS AND ELECTROPHYSIOLOGY DEVICES INCLUDING THE SAME

Номер: US20130345694A1
Автор: Swanson David K.
Принадлежит: Endoscopic Technologies, Inc. (ESTECH)

An electrophysiology electrode having multiple power connections and electrophysiology devices including the same. 1. An electrophysiology device for delivering coagulation energy to a patient tissue , comprising: a supply electrode for supplying tissue coagulation energy to the patient tissue, the supply electrode comprising a first portion and a second portion;', 'a first supply line for delivering energy to coagulate the patient tissue to the supply electrode first portion;', 'a second supply line for delivering energy to coagulate the patient tissue to the supply electrode second portion;', 'a first temperature sensor of a first temperature sensor pair coupled with the supply electrode first portion; and', 'a first temperature sensor of a second temperature sensor pair coupled with the supply electrode second portion; and, 'a supply electrode assembly having a return electrode for returning energy from the patient tissue, the return electrode comprising a first portion and a second portion;', 'a first return line for returning energy from the first portion of the return electrode;', 'a second return line for returning energy from the second portion of the return electrode;', 'a second temperature sensor of the first temperature sensor pair coupled with the return electrode first portion; and', 'a second temperature sensor of the second temperature sensor pair coupled with the return electrode second portion,, 'a return electrode assembly havingwherein the supply electrode first portion is configured to deliver energy to the patient tissue based on temperatures sensed by the first temperature sensor pair, andwherein the supply electrode second portion is configured to deliver energy to the patient tissue based on temperatures sensed by the second temperature sensor pair.2. The electrophysiology device according to claim 1 , further comprising an electrosurgical unit that supplies energy to the supply electrode via the first and second supply lines and that ...

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Номер записи: 23
26-12-2013 дата публикации

SYSTEM AND METHOD FOR TESTING ELECTROSURGICAL GENERATORS

Номер: US20130345696A1
Автор: Behnke, Frushour Scott E.M., II Robert J., Valentyik Peter L.
Принадлежит: COVIDIEN LP

A system is provided. The system includes an electrosurgical generator configured to measure, collect and record data pertaining to a characteristic of tissue as the tissue is being electrosurgically treated. A tuner configured to couple to the electrosurgical generator includes a tuning circuit providing a load having a variable complex impedance for the electrosurgical generator when the electrosurgical generator is connected thereto. A controller including stored data pertaining to impedance values is in operable communication with the electrosurgical generator for retrieving the recorded data pertaining to the characteristic of tissue. The controller is in operable communication with the tuner for varying a complex impedance of the load. The controller configured to compare the recorded data pertaining to the at least one characteristic of tissue with the stored data pertaining to the plurality of impedance values and to adjust the tuner to one of the plurality of impedance values. 1. A system , comprising:an external measurement device configured to measure, collect and record data pertaining to at least one characteristic of tissue as the tissue is being electrosurgically treated;a tuner configured to couple to an electrosurgical generator and including at least one tuning circuit configured to provide a load having a variable complex impedance for the electrosurgical generator when the electrosurgical generator is coupled to the tuner; anda controller configured to couple to the electrosurgical generator for diagnostic testing thereof, the controller including stored data pertaining to a plurality of impedance values, the controller in operable communication with the external measurement device for retrieving the recorded data pertaining to the at least one characteristic of tissue and in operable communication with the tuner for varying a complex impedance of the load, the controller configured to compare the recorded data pertaining to the at least one ...

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Номер записи: 24
30-01-2014 дата публикации

Medical system

Номер: US20140031706A1
Автор: Sumihito Konishi
Принадлежит: OLYMPUS MEDICAL SYSTEMS CORP

A high-frequency output apparatus and an ultrasound output apparatus, which are medical apparatuses, each has a CPU, a communication circuit and a speaker. Each CPU transmits, when an output volume level of a sound outputted from its own speaker is changed, information about the changed output volume level to the other medical apparatus from the communication circuit, and controls output volume of the sound outputted from its own speaker on the basis of output volume information about a sound outputted of the speaker of the other apparatus, which has been received in the communication circuit.

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Номер записи: 25
13-03-2014 дата публикации

METHOD AND APPARATUS FOR MONITORING AND ABLATING NERVES

Номер: US20140073903A1
Автор: Hastings Roger, SCHEUERMANN TORSTEN, Weber Jan
Принадлежит:

Described herein is an apparatus for locally monitoring nerve activity that may be incorporated into a nerve ablation catheter. Such a catheter is equipped with magnetic sensing for both identifying nerves and assessing the success of the ablation. The catheter is also equipped with an ablation instrument for both stimulating and destroying nerve tissue. 1. A method for monitoring nerve activity , comprising:disposing a vapor cell containing a sensor gas adjacent selected nerve tissue;transmitting light to the vapor cell and receiving light reflected therefrom;controlling the light transmission so that the vapor cell operates as a light-storage magnetometer with the reflected light having a frequency component that corresponds to the magnitude of the magnetic field at the location of the sensor gas;processing the received light to measure the magnetic field at the location of the sensor gas;analyzing the time course of the measured magnetic field to determine if the selected nervous tissue is active.2. The method of further comprising stimulating the selected nervous tissue and determining whether the stimulation resulted in nervous activity.3. The method of further comprising:operating an ablation instrument adjacent the selected nervous tissue, where the ablation instrument may be operated in either a low-power stimulation mode that stimulates the nervous tissue or a high-power ablation mode that destroys the nervous tissue;stimulating the selected nervous tissue with the ablation instrument in stimulation mode; and,if the stimulation results in nervous activity, switching the ablation instrument to ablation mode to destroy the selected nervous tissue.4. The method of further comprising determining whether the stimulation resulted in nervous activity by correlating the measured magnetic field with the time at which the stimulation was delivered.5. The method of wherein the vapor cell is incorporated into a catheter with fiber optic cable running through one or ...

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Номер записи: 26
20-03-2014 дата публикации

Methods and apparatus for renal neuromodulation

Номер: US20140081259A1
Автор: Denise Zarins, Douglas Sutton, Erik Thai, Hanson Gifford, III, Howard R. Levin, Mark E. Deem, Mark Gelfand
Принадлежит: Medtronic Ardian Luxembourg SARL

Methods and apparatus are provided for renal neuromodulation using a pulsed electric field to effectuate electroporation or electrofusion. It is expected that renal neuromodulation (e.g., denervation) may, among other things, reduce expansion of an acute myocardial infarction, reduce or prevent the onset of morphological changes that are affiliated with congestive heart failure, and/or be efficacious in the treatment of end stage renal disease. Embodiments of the present invention are configured for percutaneous intravascular delivery of pulsed electric fields to achieve such neuromodulation.

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Номер записи: 27
27-03-2014 дата публикации

SYSTEMS AND METHODS FOR CONTROLLING ENERGY APPLICATION

Номер: US20140088588A1
Автор: Jarrard Jerry
Принадлежит: BOSTON SCIENTIFIC SCIMED, INC.

Energy delivery systems and methods for treating tissue are disclosed that may include an energy generator, a cooled electrode device, and a controller connected to the energy generator. The controller may include a processor and may be configured to control power output by the cooled electrode device based on a measured impedance level of tissue at a target treatment site. 1. An energy delivery system , comprising:an energy generator;a cooled electrode device; anda controller connected to the energy generator and including a processor;wherein the controller is configured to control power output by the cooled electrode device based on a measured impedance level of tissue at a target treatment site.2. The energy delivery system of claim 1 , wherein the controller is configured to control power output based on a second impedance level set in the controller.3. The energy delivery system of claim 2 , wherein the controller is configured to calculate the second impedance level.4. The energy delivery system of claim 3 , wherein the controller is configured to calculate the second impedance level based on a percentage of the an initial impedance level measured at the target treatment site.5. The energy delivery system of claim 3 , wherein the controller is configured to calculate the second impedance level based on at least one of: a parameter of tissue at the target treatment site claim 3 , a parameter of the cooled electrode device claim 3 , a desired temperature range of tissue at the target treatment site claim 3 , and a parameter of a pre-treatment energy output pulse.6. The energy delivery system of claim 1 , wherein the controller is configured to determine a temperature that correlates to the measured impedance level.7. The energy delivery system of claim 1 , wherein the cooled electrode device includes an internal portion for cooling the cooled electrode device when the cooled electrode device is in contact with tissue at the target treatment site.8. A method for ...

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Номер записи: 28
03-04-2014 дата публикации

THERMAL ABLATION PROBE FOR A MEDICAL DEVICE

Номер: US20140094788A1
Автор: Brannan Joseph D.
Принадлежит: COVIDIEN LP

A thermal ablation probe is described having one or more sensors for sensing at least one tissue parameter, such as temperature, fluctuation in temperature change, and/or rate of temperature change. The thermal ablation probe includes an elongated shaft and a head portion at a distal end of the elongated shaft. The head portion includes a sensing system having the one or more sensors for sensing the at least one tissue parameter. The head portion further includes one or more antennas configured to apply energy to tissue. The proximal end of the thermal ablation probe is configured for removable engagement with a thermal ablation system. The one or more sensors of the sensing system form at least one thermal ablation probe array or sensing platform. The thermal ablation probe array(s) can be in operative communication with a control system of the thermal ablation system for controlling the operation of the thermal ablation system in accordance with the at least one tissue parameter. 1. A thermal ablation probe comprising:an elongated shaft; and at least one sensor in proximity to the tissue contacting surface for sensing at least one tissue parameter; and', 'at least one electrode configured to apply energy to tissue., 'a head portion at a distal end of the elongated shaft, wherein the head portion defines a tissue contacting surface, said head portion comprising2. The thermal ablation probe according to claim 1 , wherein the at least one tissue parameter is selected from the group consisting of temperature claim 1 , fluctuation in temperature claim 1 , and rate of temperature change3. The thermal ablation probe according to claim 1 , wherein the one or more sensors are part of a sensing system.4. The thermal ablation probe according to claim 1 , wherein a proximal end of the thermal ablation probe is configured for removable engagement with a thermal ablation system in operative communication with an energy delivering source.5. The thermal ablation probe according ...

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Номер записи: 29
03-04-2014 дата публикации

DEVICES AND METHODS FOR OPTICAL DETECTION OF TISSUE CONTACT

Номер: US20140094789A1
Автор: Brannan Joseph D.
Принадлежит: COVIDIEN LP

An electrosurgical system includes an energy applicator adapted to direct energy to tissue, an electrosurgical power generating source, and a surface-contact detection device. The surface-contact detection device is operably associated with the energy applicator. The surface-contact detection device is communicatively-coupled to the electrosurgical power generating source. The surface-contact detection device includes at least one optical transmitter to generate optical signals, a lens member configured to reflect optical signals generated by the optical transmitter when the lens member is disposed in contact with tissue, and at least one optical receiver to receive optical signals reflected by the lens member. The electrosurgical power generating source is adapted to transmit energy to the energy applicator when it is determined that the lens member is disposed in contact with tissue. 1. An electrosurgical device , comprising: a lens member;', 'at least one optical transmitter to generate optical signals; and', 'at least one optical receiver to receive optical signals reflected by the lens member;', 'wherein the lens member is adapted to allow the at least one optical transmitter and the at least optical receiver to communicate when the lens member is disposed in contact with tissue., 'a surface-contact detection device including2. The electrosurgical device of claim 1 , wherein the lens member is configured to reflect optical signals generated by the at least one optical transmitter when the lens member is disposed in contact with tissue.3. The electrosurgical device of claim 1 , further comprising an energy applicator adapted to direct energy to tissue claim 1 , the energy applicator including a handle member.4. The electrosurgical device of claim 3 , wherein the surface-contact detection device is coupled to a distal end of the handle member.5. The electrosurgical device of claim 3 , wherein the energy applicator includes an antenna assembly disposed at least ...

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Номер записи: 30
03-04-2014 дата публикации

HEAT-SENSITIVE OPTICAL PROBES

Номер: US20140094792A1
Автор: Sharonov Alexey
Принадлежит:

A method of directing energy to tissue includes the initial steps of determining target tissue location and/or target tissue margins, positioning an ablation device for delivery of energy to target tissue, and positioning one or more heat-sensitive optical probes into a tissue region to be monitored. Each heat-sensitive optical probe is adapted to utilize spectral properties of light to access one or more optical fiber portions of the heat-sensitive optical probe in response to heat. The method also includes the steps of applying energy to the ablation device, continuing ablation while size and/or position of ablated zone which received heat above a threshold value is displayed on a monitor using one or more electrical signals generated by the one or more heat-sensitive optical probes, determining whether the ablated zone displayed on the monitor is larger than the target tissue margins, and terminating ablation if it is determined that the ablated zone displayed on the monitor is larger than the target tissue margins. 1. A method of directing energy to tissue , comprising the steps of:determining target tissue location and target tissue margins;positioning an ablation device for delivery of energy to target tissue;positioning at least one heat-sensitive optical probe into a tissue region to be monitored, the heat-sensitive optical probe adapted to utilize spectral properties of light to access one or more optical fiber portions of the heat-sensitive optical probe in response to heat;applying energy to the ablation device;continuing ablation while size of ablated zone which received heat above a threshold value is displayed on a monitor using at least one electrical signal generated by the at least one heat-sensitive optical probe;determining whether the ablated zone displayed on the monitor is larger than the target tissue margins; andterminating ablation if it is determined that the ablated zone displayed on the monitor is larger than the target tissue margins.2. ...

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Номер записи: 31
03-04-2014 дата публикации

DEVICE AND METHOD FOR HEAT-SENSITIVE AGENT APPLICATION

Номер: US20140094793A1
Автор: Sharonov Alexey
Принадлежит:

A method of directing energy to tissue includes the initial steps of determining target tissue location and/or target tissue margins, positioning an ablation device for delivery of energy to target tissue, and introducing a material having a shape into a tissue region to be monitored. The material is adapted to change echogenic properties in response to heat. The method also includes the steps of applying energy to the ablation device, monitoring the material on a monitor, determining an echogenic response of the material, and terminating ablation if it is determined that the echogenic response of the material is outside a predetermined target tissue threshold. 1. A method of directing energy to tissue , comprising the steps of:determining target tissue location and target tissue margins;positioning an ablation device for delivery of energy to target tissue;introducing a material having a shape into a tissue region to be monitored, the material adapted to change echogenic properties in response to heat;applying energy to the ablation device;monitoring the material on a monitor;determining an echogenic response of the material; andterminating ablation if it is determined that the echogenic response of the material is outside a predetermined target tissue threshold.2. The method of directing energy to tissue of claim 1 , wherein the target tissue location and target tissue threshold are determined by using medical imaging.3. The method of directing energy to tissue of claim 1 , wherein the material includes at least one heat-sensitive agent.4. The method of directing energy to tissue of claim 1 , wherein the shape of the material is linear.5. The method of directing energy to tissue of claim 1 , wherein the shape of the material is curvilinear.6. The method of directing energy to tissue of claim 1 , wherein the material is introduced into the tissue region to be monitored using an injection device.7. The method of directing energy to tissue of claim 6 , wherein the ...

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Номер записи: 32
03-04-2014 дата публикации

SYSTEM AND METHOD FOR USING RESONANCE PHASING FOR MEASURING IMPEDANCE

Номер: US20140094796A1
Автор: Behnke, II Robert J.
Принадлежит: COVIDIEN LP

A return electrode monitoring (REM) system for an electrosurgical system is disclosed. The REM system includes circuit components or circuitry for monitoring the magnitude of an interrogation or drive signal, and one or more electrode pads including one or more pairs of split electrode pads. The REM system, while sweeping an interrogation signal over or across a frequency range, monitors the magnitude of the interrogation signal. The REM system determines if there is a frequency shift in the interrogation signal. If there is a frequency shift, the REM system determines the frequency shift and uses it to calculate a reactance value of the impedance. The complex impedance can then be determined. The complex impedance, or at least the reactance value, can be used to determine the capacitive coupling between the patient and pad interface. 1. A return electrode monitoring system , comprising:at least one return electrode pad including at least one pair of split electrode pads; andprocessing circuitry operatively coupled to the at least one pair of split electrode pads and to a controller for receiving and sweeping a drive signal over a frequency range, the drive signal generating at least one feedback signal, wherein frequency shift information corresponding to the feedback signal is used by the processing circuitry for determining a reactance of a complex impedance across the at least one pair of split electrode pads.2. A return electrode monitoring system according to claim 1 , wherein the processing circuitry includes a digital signal processor (DSP).3. A return electrode monitoring system according to claim 1 , wherein the processing circuitry is configured to measure a voltage of the feedback signal.4. A return electrode monitoring system according to claim 1 , wherein the processing circuitry is configured to increase claim 1 , decrease or keep constant a frequency of the drive signal in accordance with magnitude information corresponding to the feedback signal.5. ...

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Номер записи: 33
03-04-2014 дата публикации

DEVICES AND METHODS FOR OPTICAL DETECTION OF TISSUE CONTACT

Номер: US20140094797A1
Автор: Brannan Joseph D.
Принадлежит: COVIDIEN LP

A method of directing energy to tissue includes the initial step of positioning an energy applicator for delivery of energy to target tissue. The energy applicator is provided with a surface-contact detection device including one or more optical transmitters and one or more optical receivers. The energy applicator is operably associated with an electrosurgical power generating source. The method also includes the steps of determining whether a radiating portion of the energy applicator is disposed in contact with the target tissue based on a determination of whether optical signals generated by the one or more optical transmitters result in reflected optical signals received at the one or more optical receivers, and if it is determined that the radiating portion of the energy applicator is disposed in contact with tissue, transmitting energy from the electrosurgical power generating source through the radiating portion to the target tissue. 1. An electrosurgical system , comprising: an antenna assembly including a waveguide that includes an open end and electrically-conductive walls defining a cavity therein, the cavity in communication with the open end; and', 'a dielectric structure including a plurality of dielectric layers, the dielectric structure disposed at least partially within the cavity;, 'an energy applicator adapted to direct energy to tissue, the energy applicator includingan electrosurgical power generating source; at least one optical transmitter to generate optical signals;', 'a lens member configured to reflect optical signals generated by the optical transmitter when the lens member is disposed in contact with tissue; and', 'at least one optical receiver to receive optical signals reflected by the lens member;, 'a surface-contact detection device operably associated with the energy applicator, the surface-contact detection device communicatively-coupled to the electrosurgical power generating source, the surface-contact detection device ...

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Номер записи: 34
06-01-2022 дата публикации

Surgical cutting device

Номер: US20220000536A1
Автор: Benjamin B Fulmer, Eugene A. Eighmy, Lloyd G.B. Cooper
Принадлежит: Fulmer Instruments LLC

A cordless surgical knife comprises an enclosure and a blade extending from the enclosure. The enclosure contains a differential amplifier circuit configured to provide an RF signal, an output monitor feedback circuit, a return monitor feedback circuit, and a microprocessor that receives data from the feedback circuits and adjusts the RF signal. The enclosure contains a receiving antenna that is operable to receive a wireless signal associated with the RF signal from tissue of a patient. A transmitting antenna may be in electrical contact with tissue of the patient and transmit the wireless signal. Optionally, both the receiving antenna and transmitting antenna include at least two separate inductive circuits aligned on different planes, or each of the receiving antenna and the transmitting antennas is encapsulated inside an enclosure floating in a liquid so that the antennas are aligned by gravity.

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Номер записи: 35
07-01-2016 дата публикации

ELECTROSURGICAL SYSTEM

Номер: US20160000495A1
Автор: Albrecht Jeremy, Durant Dan, Elliott Patrick, Gorin Igor, Hudson Kevin, Jacobs Hank, JOHNSON GARY, Kowalski Jerry, Linville-Engler Benjamin, LOGAN Michael, Matthews Thomas, McFarland Daniel, Nguyen Duy, Sabarad Jagdish, Tiberia Lou, Whitlock Michael
Принадлежит:

An electrosurgical generator arranged to supply radio frequency (RF) energy to fuse tissue is provided. The generator is arranged to supply RF energy through a removably coupled electrosurgical instrument to fuse tissue grasped by the instrument. The generator monitors a phase angle of the supplied RF energy and adjusts or terminates the supplied RF energy based on the monitored phase angle in comparison to predetermined thresholds and conditions to optimally fuse the tissue. The electrosurgical instrument conducts radio frequency energy to fuse tissue captured between the jaws and a blade to mechanically cut tissue between the jaws. A conductive post positioned on the jaw adjacent to the blade 1. An electrosurgical system comprising:an electrosurgical instrument arranged to grasp and fuse tissue using radio frequency (RF) energy; andan electrosurgical generator connectable to the electrosurgical instrument and configured to supply the RF energy through the electrosurgical instrument, the generator comprising:an RF amplifier to supply RF energy through the electrosurgical instrument; anda controller arranged to monitor a phase angle of the supplied RF energy, the controller signaling the RF amplifier to adjust voltage of the supplied RF energy when the monitored phase angle is equal to a predefined phase value or starts decreasing.2. The system of wherein the predefined phase value is zero degrees.3. The system of wherein the adjustment of voltage by the RF amplifier comprises the RF amplifier decreasing the voltage of the supplied RF energy.4. The system of wherein the adjustment of voltage by the RF amplifier comprises the RF amplifier maintaining the voltage of the supplied RF energy at its current voltage level.5. The system of wherein the adjustment of voltage by the RF amplifier comprises the RF amplifier setting the voltage of the supplied RF energy to a predetermined voltage.6. The system of wherein the controller determines a second predefined phase value ...

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Номер записи: 36
07-01-2021 дата публикации

System, method and computer-accessible medium for in-vivo tissue ablation and/or damage

Номер: US20210000527A1
Автор: Govindarajan Srimathveeravalli, Stephen Barnett SOLOMON
Принадлежит: Memorial Sloan Kettering Cancer Center

Systems, methods and computer-accessible mediums can be provided that can establish particular parameters for electric pulses based on a characteristic(s) of the tissue(s), and control an application of the electric pulses to tissue(s) for a plurality of automatically controlled and separated time periods to ablate the tissue(s) through mediation of membrane potential and through inducing the cells through a plurality of charge-discharge cycles such that an electroporation of a majority of the tissue(s) is prevented or reduced.

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Номер записи: 37
02-01-2020 дата публикации

Vaginal remodeling device and methods

Номер: US20200000517A1
Автор: Chun-Chih Cheng, Ian F. Smith, Jerome Jackson, Jonathan B. Parmer, Patrick Karl Howe, Sean Yasuo Sullivan, Sheree Leigh LUCAS, Stanley Levy, Steven Marc Lopez
Принадлежит: Viveve Inc

This invention relates generally to apparatus and methods for tightening tissue of the female genitalia by heating targeted connective tissue with radiant energy, while cooling the mucosal epithelial surface over the target tissue to protect it from the heat. Embodiments include a handle and treatment tip that has both an energy delivery element and a cooling mechanism. The handle may be a two-handed handle allowing control even while rotating and maneuvering the treatment around the genital opening. The apparatus or system may also include an integrated controller, which may confirm tissue contact without applying RF energy, based only on the temperature of the applicator and the time since the last application of energy from the applicator.

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Номер записи: 38
04-01-2018 дата публикации

System and method for testing electrosurgical generators

Номер: US20180000532A1
Автор: II Robert J. Behnke, Peter L. Valentyik, Scott E.M. Frushour
Принадлежит: COVIDIEN LP

A system is provided. The system includes an electrosurgical generator configured to measure, collect and record data pertaining to a characteristic of tissue as the tissue is being electrosurgically treated. A tuner configured to couple to the electrosurgical generator includes a tuning circuit providing a load having a variable complex impedance for the electrosurgical generator when the electrosurgical generator is connected thereto. A controller including stored data pertaining to impedance values is in operable communication with the electrosurgical generator for retrieving the recorded data pertaining to the characteristic of tissue. The controller is in operable communication with the tuner for varying a complex impedance of the load. The controller configured to compare the recorded data pertaining to the at least one characteristic of tissue with the stored data pertaining to the plurality of impedance values and to adjust the tuner to one of the plurality of impedance values.

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Номер записи: 39
05-01-2017 дата публикации

ELECTROSURGICAL GENERATOR FOR MINIMIZING NEUROMUSCULAR STIMULATION

Номер: US20170000549A1
Автор: FRIEDRICHS Daniel A., GILBERT JAMES A.
Принадлежит:

A system for minimizing neuromuscular stimulation includes a converter, an inverter, and a controller. The converter is configured to output a dc waveform and includes at least one first switching element operated at a first duty cycle. The inverter is coupled to the converter and includes at least one second switching element operated at a second duty cycle. The inverter is configured to invert the DC waveform to generate an electrosurgical pulse waveform. The controller is coupled to the converter and the inverter, and is configured to control the first duty cycle to adjust a magnitude of the electrosurgical pulse waveform and the second duty cycle to adjust at least one property of the electrosurgical pulse waveform to minimize neuromuscular stimulation. 1. An electrosurgical generator for minimizing neuromuscular stimulation , comprising:a converter configured to output a DC waveform, the converter including at least one first switching element operated at a first duty cycle;an inverter coupled to the converter and including at least one second switching element operated at a second duty cycle, the inverter configured to invert the DC waveform to generate an electrosurgical pulse waveform; anda controller coupled to the converter and the inverter and configured to control the first duty cycle to adjust a magnitude of the electrosurgical pulse waveform and the second duty cycle to adjust at least one property of the electrosurgical pulse waveform.2. The electrosurgical generator according to claim 1 , wherein the electrosurgical pulse waveform is monophasic to cause neuromuscular stimulation claim 1 , andwherein the at least one property includes at least one of a repetition frequency or a pulse width period.3. The electrosurgical generator according to claim 2 , wherein the controller is configured to adjust the repetition frequency of the monophasic electrosurgical pulse waveform to be greater than about 100 kHz.4. The electrosurgical generator according to ...

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Номер записи: 40
05-01-2017 дата публикации

SYSTEMS AND METHODS FOR LIMITING JOINT TEMPERATURE

Номер: US20170000550A1
Автор: DeCou Robert, Knudsen Katherine, Marion Duane W.
Принадлежит:

Limiting joint temperature. At least some of the example embodiments are systems including an electrosurgical probe and a high frequency power supply. The electrosurgical probe may include: a shaft with a distal end, a proximal end, and lumen defined within the shaft; an active electrode disposed near the distal end; a return electrode disposed on the shaft; and a temperature sensor disposed on the shaft spaced away from the active electrode and the return electrode, the temperature sensor is electrically insulated from the electrically conductive fluid. The high frequency power supply may be coupled to the active electrode, and configured to provide an electrical energy output between the active electrode and the return electrode. 1. A system comprising: a shaft with a distal end, a proximal end, and lumen defined within the shaft;', 'an active electrode disposed near the distal end of the shaft;', 'a return electrode positioned on the shaft; and', 'a temperature sensor disposed on the shaft spaced away from the active electrode and the return electrode, the temperature sensor electrically insulated from tissues and fluids outside the shaft;', 'a high frequency power supply, the high frequency power supply coupled to the active electrode, and the high frequency power supply configured to provide an electrical energy output between the active electrode and the return electrode., 'an electrosurgical probe comprising2. The system of wherein the temperature sensor is disposed at least 5 mm away from the distal end of the shaft.3. The system of wherein the high frequency power supply further comprises an analog-to-digital converter coupled to the temperature sensor claim 1 , the analog-to-digital converter configured to convert a reading of the temperature sensor to a digital signal.4. The system of wherein the temperature sensor further comprises a thermocouple.5. The system of wherein the temperature sensor further comprises a T-type thermocouple.6. The system of ...

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Номер записи: 41
05-01-2017 дата публикации

ELECTROSURGICAL GENERATOR AND SYSTEM

Номер: US20170000551A1
Автор: Sartor Joe D., Ward Arlen K., WHAM Robert H.
Принадлежит:

An electrosurgical generator includes an electrosurgical energy output configured to deliver electrosurgical energy to a bipolar end effector assembly in a conductive fluid environment for treating tissue. A controller having a processor is configured to control a waveform of the electrosurgical energy such that the waveform oscillates between a cut phase for initiating and sustaining tissue cutting, wherein the waveform includes a cut energy greater than the energy needed to create and sustain arcing, and a hemostasis phase, for desiccating/coagulating tissue, wherein the waveform includes a hemostasis energy less than the energy needed to sustain arcing. 120-. (canceled)21. An electrosurgical generator , comprising:an electrosurgical energy output configured to deliver electrosurgical energy to a bipolar end effector assembly; anda controller having a hardware processor configured to control a waveform of the electrosurgical energy delivered from the output to the bipolar end effector assembly such that the waveform oscillates between a first mode and a second mode, wherein the first mode is continued for a first time interval and the second mode is continued for a second time interval, and wherein the processor is configured to determine at least one of the first time interval or the second time interval in accordance with a movement distance of a portion of the bipolar end effector assembly during the at least one of the first mode or the second mode, respectively.22. The electrosurgical generator according to claim 21 , wherein the processor is configured to determine at least one of the first time interval or the second time interval in accordance with the movement distance of at least one of a first electrode or a second electrode of the bipolar end effector assembly during at least one of the first mode or the second mode.23. The electrosurgical generator according to claim 21 , wherein the first mode corresponds to a cut mode configured to facilitate ...

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Номер записи: 42
13-01-2022 дата публикации

SYSTEMS AND METHODS FOR CONTROLLING POWER IN AN ELECTROSURGICAL GENERATOR

Номер: US20220008114A1
Автор: COULSON REBECCA J., McHenry Jennifer R., Olson Jessica E.C., RICKE ANTHONY D., WASKIEWICZ ALEXANDER M.
Принадлежит:

The electrosurgical systems and corresponding methods of the present disclosure involve an electrosurgical generator, sensing circuitry, and a controller. The electrosurgical generator includes a radio frequency (RF) output stage that supplies power to tissue. The sensing circuitry measures impedance of tissue. The controller controls the power supplied from the RF output stage to track a nonlinear power curve until the power supplied from the RF output stage has reached a predetermined peak power of the nonlinear power curve. The controller further determines whether a tissue reaction has occurred based on impedance measured by the sensing circuitry and controls the power supplied from the RF output stage during a cooling phase if the controller determines that a tissue reaction has occurred. The controller may further control the power supplied from the RF output stage to track a linear power curve. 119-. (canceled)20. An electrosurgical forceps , comprising:an end effector including a first jaw member and a second jaw member, each having an electrically-conductive sealing plate, at least one of the first or second jaw members configured to move relative to the other of the first or second jaw members from an open position to a closed position to grasp tissue between the electrically-conductive sealing plates; andan identification module configured to store power curve data including a nonlinear power curve is a non-linear third-order polynomial defined by a plurality of coefficients.21. The electrosurgical forceps according to claim 20 , wherein the identification module is readable by an electrosurgical generator configured to supply electrosurgical energy based on the power curve data.22. The electrosurgical forceps according to claim 20 , wherein the identification module is further configured to store impedance data pertaining to the end effector.23. The electrosurgical forceps according to claim 22 , wherein the impedance data includes at least one of: an ...

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Номер записи: 43
01-01-2015 дата публикации

REAL-TIME PREDICTION OF STEAM-POP EVENTS DURING ABLATION

Номер: US20150005758A1
Автор: Bar-Tal Meir, Berger Abraham, HAZAN Avri, Osadchy Daniel
Принадлежит:

A method for performing a medical procedure, includes, coupling a probe to tissue in an organ of a patient. Ablation energy is applied to the tissue using the probe. A model of an evolution of steam pressure in the tissue, caused by the ablation energy, as a function of time is estimated. Based on the model, an occurrence time of a steam pop event caused by the steam pressure is predicted, and the predicted occurrence time of the steam pop event is indicated to an operator. 1. A method for performing a medical procedure , comprising:coupling a probe to tissue in an organ of a patient;applying ablation energy to the tissue using the probe;estimating a model of an evolution of steam pressure in the tissue, caused by the ablation energy, as a function of time;predicting, based on the model, an occurrence time of a steam pop event caused by the steam pressure; andindicating the predicted occurrence time of the steam pop event to an operator.2. The method according to claim 1 , wherein estimating the model comprises estimating an evolution of temperature in the tissue claim 1 , caused by the ablation energy claim 1 , as a function of time.3. The method according to claim 1 , wherein estimating the model comprises estimating a penetration depth of the probe into the tissue claim 1 , and calculating the model based on the penetration depth and the ablation energy.4. The method according to claim 3 , wherein estimating the penetration depth comprises measuring multiple values of temperature and impedance of the tissue claim 3 , and estimating the penetration depth based on the measured values.5. The method according to claim 1 , wherein estimating the model comprises estimating a function curve of the tissue pressure as a function of time claim 1 , and wherein predicting the occurrence time of the steam pop event comprises identifying an intersection time between the function curve and a predefined threshold claim 1 , and deriving the occurrence time from the intersection ...

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Номер записи: 44
01-01-2015 дата публикации

PULSE GENERATOR

Номер: US20150005760A1
Автор: POULSEN Henrik Bisgaard
Принадлежит:

An electrosurgical instrument for use with an electrosurgical generator. The electrosurgical instrument incorporates a signal modificator having an input end electrically connected to the electrosurgical generator and an output end electrically connected to one or more electrodes of the electrosurgical instrument, where the signal modificator modifies a continuous signal from the electrosurgical generator into a pulsing signal to the one or more electrodes of the electrosurgical instrument. The signal modificator comprises a circuit for providing the pulsing signal. 1. An electrosurgical instrument for use with an electrosurgical generator , wherein the electrosurgical instrument incorporates a signal modificator having an input end electrically or connectable to the electrosurgical generator and an output end electrically connected to one or more electrodes of the electrosurgical instrument , where the signal modificator is adapted to modify a continuous signal from the electrosurgical generator into a pulsing signal to the one or more electrodes of the electrosurgical instrument and comprises a circuit for providing the pulsing signal.2. The electrosurgical instrument according to claim 1 , wherein the signal modificator is incorporated inside a part of a housing or a casing of the electrosurgical instrument claim 1 , preferably inside a handle or part of a handle of the electrosurgical instrument.3. The electrosurgical instrument according to claim 2 , wherein the circuit comprises a timer IC such as a 555 Timer IC claim 2 , a Schmitt trigger claim 2 , a Blocking oscillator claim 2 , or an Armstrong oscillator.4. The electrosurgical instrument according to claim 2 , wherein the circuit is adapted for controlling switching means to electrically connect/disconnect the one or more electrodes to/from the electrosurgical generator.5. The electrosurgical instrument according to claim 1 , wherein the signal modificator is detachably secured to the electrosurgical ...

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Номер записи: 45
01-01-2015 дата публикации

ELECTRO-SURGICAL SYSTEM, AN ELECTRO-SURGICAL DEVICE, AND A METHOD FOR OPERATING AN ELECTRO-SURGICAL SYSTEM

Номер: US20150005765A1
Автор: Bierhoff Waltherus Cornelis Jozef, Hendriks Bernardus Hendrikus Wilhelmus, Horikx Jeroen Jan, Kahya Neriman Nicoletta, Klewer Jasper, LUCASSEN GERHARDUS WILHELMUS, Mueller Manfred, REICH CHRISTIAN, Ruers Theodoor Jacques Marie, VAN DER VOORT MARJOLEIN
Принадлежит: KONINKLIJKE PHILIPS N.V.

An electro-surgical system () with an optical feedback functionality for performing electro-surgery on tissue () of patient. An electro-surgical device () has an electrode portion () with an optical guide () integrated therein. An optical unit () performs optical characterization of tissue type and/or condition, and is arranged for performing an analysis of the tissue type and/or condition. A control unit () generates a feedback control signal (FEEDCON) based on the analysis of the tissue type and/or condition, optical guide allows inspecting the tissue that is e.g. just a few millimeters ahead of the electrode portion () performing e.g. the cutting. As a result of the fast and reliable analysis performed by the spectrometer in the optical unit according to the present invention, the system can proactively react to what kind of tissue is in front of the electro-surgical portion i.e. the ‘blade’ of the electro-surgical device or the electro-surgical ‘knife’. 1100. An electro-surgical system () with an optical feedback functionality for performing electro-surgery on an associated subject , the system comprising:{'b': '150', 'an electro-surgical power source () capable of providing a high frequency (HF) signal,'}{'b': '105', 'an electro-surgical device (), the device comprising{'b': '130', 'a handling portion (), and'}{'b': '110', 'an electrode portion (), the electrode portion being electrically connected to the electro-surgical power source for receiving said high frequency (HF) signal so as to perform electro-surgery upon bringing the electrode portion into contact and/or proximity of said subject, and'}{'b': 114', '115', '115, 'i': a', 'b, 'an optical guide (), wherein the optical guide comprises at least two or three optical sub guides, at least one optical sub guide for transmitting optical radiation for irradiation of tissue, and at least one optical sub guide for receiving optical radiation from the tissue, the optical guide being integrated into said electrode ...

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Номер записи: 46
11-01-2018 дата публикации

SYSTEMS AND METHODS FOR TREATING TISSUE WITH RADIOFREQUENCY ENERGY

Номер: US20180008336A1
Автор: GREEN Ronald L., Radziunas Jeffrey, Shikhman Oleg
Принадлежит: Mederi Therapeutics, Inc.

A device for applying radiofrequency energy for sphincter treatment comprising a flexible outer tube, an expandable basket having a plurality of arms movable from a collapsed position to an expanded position, and a plurality of electrodes movable with respect to the arms from a retracted position to an extended position. An advancer is slidably disposed within the outer tube to move the plurality of electrodes to the extended position. An actuator moves the advancer from a first position to a second position to advance the plurality of electrodes. An aspiration tube extends within the outer tube. An assembly includes an aspiration disabler having a first position to enable aspiration from a distal portion of the aspiration tube to a proximal portion and a second position to disable aspiration. 116-. (canceled)17. A method of treating gastrointestinal reflux disease comprising:providing a treatment device having a plurality of electrodes and an assembly having a disabler for disabling aspiration through an aspiration tube extending within the device, the disabler having a first position to enable aspiration from a distal portion of the aspiration tube to a proximal portion of the aspiration tube, the disabler movable to a second position to disable aspiration to facilitate axial and rotational movement of the treatment device within tissue and to limit undesired movement of tissue which can cause overtreatment of tissue and tissue ablation;applying radiofrequency energy to the plurality of electrodes to thermally treat tissue below a tissue ablation threshold and create a plurality of tissue lesions along axially spaced tissue levels within the upper gastrointestinal tract;monitoring tissue temperature throughout the applying of radiofrequency energy; andregulating power ensuring in response to the monitoring of tissue temperature that the tissue temperature does not exceed a predetermined value which would cause tissue ablation and/or tissue necrosis.18. The method ...

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Номер записи: 47
27-01-2022 дата публикации

CATHETER WITH ABLATION ELECTRODE

Номер: US20220022957A1
Автор: Harlev Doron, Tsai Luke, Wallace Andrew Miles
Принадлежит:

Ablation systems and methods of the present disclosure control lesion depth and width such that, for example, wide and shallow lesions can be formed in target tissue in an anatomic structure of a patient during a medical procedure. Such wide and shallow lesions can be useful for treating, for example, thin tissue such as atrial tissue in atria of the heart of the patient. 1. A catheter , comprising:an elongated shaft including a distal end portion; andan expandable ablation electrode having (i) a proximal region coupled to the distal end portion of the elongated shaft and (ii) a distalmost region opposite the proximal region,wherein the ablation electrode is transformable between a low-profile delivery state and an expanded treatment state for delivery of therapeutic energy to target tissue, and the ablation electrode has a maximum radial dimension greater than a maximum radial dimension of the distal end portion of the elongated shaft in an absence of external force applied to the ablation electrode,', 'the ablation electrode is configured such that blood or another fluid can flow therethrough, and', 'the ablation electrode is configured such that the therapeutic energy can be delivered to the target tissue through an outer portion of the ablation electrode, including through the distalmost region of the ablation electrode, and independent of orientation of contact between the outer portion of the ablation electrode and the target tissue., 'wherein, when in the expanded treatment state'}2. The catheter of wherein:when in the expanded treatment state in the absence of the external force, the ablation electrode is positionable at multiple different angles relative to the target tissue; andfor a same amount of the therapeutic energy delivered through the outer portion of the ablation electrode to the target tissue, the ablation electrode is configured such that lesions of similar sizes can be generated at each of the multiple different angles.3. The catheter of ...

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Номер записи: 48
10-01-2019 дата публикации

Low Power Tissue Sealing Device and Method

Номер: US20190008576A1
Автор: Helfer Joel, Kennedy Jenifer, Ross David, Schechter David, Schmaltz Dale
Принадлежит:

An electrosurgical instrument has a power supply operatively coupled to an end effector. The end effector has a pair of jaws for effectuating an action on tissue positioned therebetween. The power supply is configured to input a first signal and a second signal to a buck-boost converter. The buck-boost converter is configured to transmit an output to an H-bridge circuit. The H-bridge circuit is configured to pass a signal to a resonant LC transformer circuit. The power supply is configured to transmit a power signal. The pair of jaws are operatively coupled to the power supply to receive the power signal, the power having no more than 80 Volts RMS, and less than 2 Amps RMS. The power is configured to seal the tissue positioned between the pair of jaws in 3 seconds or less. 1. An electrosurgical instrument , comprising:a power supply operatively coupled to an end effector,the end effector having a pair of jaws for effectuating an action on tissue positioned therebetween,the power supply configured to input a first signal and a second signal to a buck-boost converter, the buck-boost converter configured to transmit an output to an H-bridge circuit, the H-bridge circuit configured to pass a signal to a resonant LC transformer circuit, the power supply configured to transmit a power signal; andthe pair of jaws operatively coupled to the power supply to receive the power signal, the power having no more than 80 Volts RMS, and less than 2 Amps RMS, the power configured to seal the tissue positioned between the pair of jaws in 3 seconds or less.2. The instrument of claim 1 , wherein:the pair of jaws are configured to compress the tissue to a thickness of 0.005 inches or less.3. The instrument of claim 1 , wherein:the resonant LC transformer circuit comprises includes a capacitor, an inductor, and a transformer, wherein the transformer is a 1:9 transformer.4. The instrument of claim 1 , wherein:the power has 1.5 Amps or less.5. The instrument of claim 1 , wherein:the pair ...

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Номер записи: 49
03-02-2022 дата публикации

Cautious irreversible-electroporation (ire) protocol for avoiding bubble generation

Номер: US20220031387A1
Автор: Assaf Govari
Принадлежит: Biosense Webster Israel Ltd

An irreversible electroporation (IRE) includes setting an initial IRE protocol for applying IRE pulses by electrodes of a catheter placed in contact with tissue in an organ. A notification is issued to a user upon determining that the initial IRE protocol is expected to cause bubbles in blood. In response to the notification, user input is received from the user, that selects between the initial IRE protocol and an alternative protocol that is not expected to cause the bubbles. The IRE pulses are applied according to the initial IRE protocol or the alternative IRE protocol, depending on the user input.

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Номер записи: 50
19-01-2017 дата публикации

METHODS AND SYSTEMS FOR THERMALLY-INDUCED RENAL NEUROMODULATION

Номер: US20170014177A1
Автор: Clark Benjamin J., Thai Erik, Wu Andrew, Zadno Nicolas, Zarins Denise
Принадлежит:

Methods and system are provided for thermally-induced renal neuromodulation. Thermally-induced renal neuromodulation may be achieved via direct and/or via indirect application of thermal energy to heat or cool neural fibers that contribute to renal function, or of vascular structures that feed or perfuse the neural fibers. In some embodiments, parameters of the neural fibers, of non-target tissue, or of the thermal energy delivery element, may be monitored via one or more sensors for controlling the thermally-induced neuromodulation. In some embodiments, protective elements may be provided to reduce a degree of thermal damage induced in the non-target tissues. In some embodiments, thermally-induced renal neuromodulation is achieved via delivery of a pulsed thermal therapy. 1117-. (canceled)118. A field generator adapted to be external to a human patient and operably coupled to an intravascular catheter having a distal electrode for treatment of the patient , the field generator comprising:non-transitory memory storing a set of instructions; anda processor coupled to the non-transitory memory, increase energy delivery, from the field generator to the electrode when the electrode is positioned at a target intravascular site, at a generally constant rate to a predetermined first power level over a predetermined first period of time;', 'maintain energy delivery to the electrode at the first power level for a second period of time; and', 'increase energy delivery to the electrode in predetermined increments following the second period of time if a measured temperature value at the target intravascular site is less than a preset temperature threshold and a measured impedance value is less than a predetermined impedance threshold, the increase in energy delivery following the second period of time continuing until the power level has reached a target maximum power threshold., 'wherein the set of instructions are configured to cause the processor to—'}119. The field ...

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Номер записи: 51
21-01-2016 дата публикации

SURGICAL INSTRUMENT CONTROL

Номер: US20160015447A1
Автор: BROGNA Salvatore J., Rosa David J.
Принадлежит: INTUITIVE SURGICAL OPERATIONS, INC.

A computer-controlled surgical system may include a surgical instrument having a working end, the working end having a moveable mechanical component, and movement of the mechanical component performing a clamping and cutting function by the working end. The surgical system may further include a computer control system operably coupled to the surgical instrument and to first and second input devices. In response to a first command received from the first input device, the computer control system controls movement of the mechanical component within a first range of motion, and in response to a second command received from the second input device, the computer control system controls movement of the mechanical component within a second range of motion different from the first range of motion.

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Номер записи: 52
17-01-2019 дата публикации

APPARATUS FOR EFFECTIVE ABLATION AND NERVE SENSING ASSOCIATED WITH DENERVATION

Номер: US20190015002A1
Автор: Almany Steven, FISCHELL DAVID R., FISCHELL TIM A., Ghazarossian Vartan, John Michael Sasha
Принадлежит:

An intravascular catheter for nerve activity ablation and/or sensing includes one or more needles advanced through supported guide tubes (needle guiding elements) which expand to contact the interior surface of the wall of the renal artery or other vessel of a human body allowing the needles to be advanced though the vessel wall into the extra-luminal tissue including the media, adventitia and periadvential space. The catheter also includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened needles are advanced to penetrate into the vessel wall. Electrodes near the distal ends of the needles allow sensing of nerve activity before and after attempted renal denervation. In a combination embodiment ablative energy or fluid is delivered from the needles in or near the adventitia to ablate nerves outside of the media while sparing nerves within the media. 1. A catheter for sensing the activity from nerves outside of the lumen of a target vessel of a human body comprising:a catheter body having a distal end for insertion into a patient, a proximal end for controlling the movement of at least one needle, and a central axis extending in a longitudinal direction;a connector configured to connect to external electronic equipment outside of a proximal end of the catheter, said equipment having a sensing subsystem configured for sensing local nerve activity within a patient, and configured to be connected to at least one additional electrode in electrical contact with the patient;at least one needle guiding element adapted to expand outwardly from the catheter body toward the interior wall of the target vessel;at least one needle, the needle having at least one distal electrode, the needle adapted to be advanced outwardly, guided by the at least one needle guiding element to penetrate and advance through the interior wall of the ...

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Номер записи: 53
28-01-2016 дата публикации

ELECTROSURGICAL SYSTEM AND METHOD HAVING ENHANCED ARC PREVENTION

Номер: US20160022349A1
Автор: Armstrong Scott A., Gaspredes Jonathan L., Woloszko Jean
Принадлежит:

Electrosurgical systems and methods are described herein, the system including an electrosurgical probe with an active electrode disposed near the probe distal end, a system with a power supply for delivery of voltage to the active electrode and a controller that receives and processes a signal from a current sensor and a temperature sensor. The current sensor measures the current output of the power supply and the temperature sensor is adjacent an electrically conductive fluid located at a target site. The controller may be programmed to operate in a low voltage mode that limits the power supply to a low voltage output so as to determine whether the current output from the current sensor is within a current output range. This range is defined by predetermined upper and lower limits that are modified by at least one measured value. 1. An electrosurgical system for treating tissue comprising:an electrosurgical probe comprising a shaft having a distal end and a proximal end, an active electrode disposed near the distal end;a high frequency power supply for delivery of high frequency voltage to said active electrode, the high frequency power supply coupled to the active electrode and a return electrode;a controller electrically connected to receive and process a signal from a current sensor, the current sensor operable to measure a current output associated with the power supply when a low voltage output is delivered to the active electrode or the return electrode; andwherein the controller is programmed to prevent delivery of a therapeutic voltage output until the current output received is within a range, said range having an upper limit set in relation to at least one measured value.2. The system of claim 1 , wherein the at least one measured value is selected from the group consisting of: an electrode circuit impedance; voltage applied; electrical current applied; and power provided.3. The system of claim 1 , wherein the controller is electrically connected to ...

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Номер записи: 54
28-01-2016 дата публикации

METHOD AND SYSTEM RELATED TO ELECTROSURGICAL PROCEDURES

Номер: US20160022350A1
Автор: Gaspredes Jonathan L., Ryan Thomas P., Woloszko Jean, Yuan David Y.
Принадлежит:

Electrosurgical procedures. At least some of the example methods that include: supplying energy to an active electrode of an electrosurgical wand, the supplying energy to the active electrode by an electrosurgical controller; monitoring an electrical parameter associated with the energy; and determining, based on the electrical parameter, the presence of a wand condition of the electrosurgical wand, the wand condition being at least one selected from the group consisting of: a surface area of the active electrode is less than a predetermined threshold surface area; the surface area of the active electrode is approaching the predetermined threshold surface area; and that the electrosurgical wand is affected by a blockage. 1. A method comprising:supplying energy to an active electrode of an electrosurgical wand, the supplying energy to the active electrode by an electrosurgical controller;monitoring an electrical parameter associated with the energy; anddetermining, based on the electrical parameter, the presence of a wand condition of the electrosurgical wand, the wand condition being at least one selected from the group consisting of: a surface area of the active electrode is less than a predetermined threshold surface area; the surface area of the active electrode is approaching the predetermined threshold surface area; and that a fluid flow through the electrosurgical wand is at least partially blocked.2. The method of wherein determining further comprises:calculating a value indicative of variation of the electrical parameter over at least a portion of the predetermined period of use; anddetermining the presence of the wand condition based on the value indicative of electrical variation.3. The method of wherein determining the presence of the wand condition based on the value indicative of electrical variation further comprises determining the wand condition as present when the value indicative of variation is below a predetermined value.4. The method of : ' ...

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Номер записи: 55
25-01-2018 дата публикации

APPARATUS FOR TREATING SKIN BLEMISHES WITH COLD PLASMA

Номер: US20180021080A1
Автор: FUMI Eugenio, URBANI Danilo
Принадлежит:

Disclosed is a medical apparatus including at least one electrode for generating cold plasma, the electrode including a tail and a head and being covered with isolating and biocompatible mineral material, the tail being the electrode portion to be connected with the corresponding handpiece and the head being the electrode portion to be faced towards the skin of the patient, the apparatus including at least one electrode including a head including a spherical end and/or at least one electrode including a head shaped to form a corkscrew-like element. 11211101213111413153241112511662122231871918208910010012011012018110100100110130100110140. Apparatus externally comprising: at least one mechanical structure for the containment and electromagnetic screening , and internally comprising: a first unit () comprising: at least one color LCD display with touch screen and accessible from a front panel of said apparatus; a second unit () comprising: at least one logic card in turn containing a microprocessor () with memory () for resident programs , at least one DDS () adapted to generate RF signals preset according to need , at least one modulator-attenuator () controlled by the microprocessor () and generating pulses , at least one ON-OFF function , at least one system for the adjustment of intensity of the output radiofrequency of the entire machine , at least one amplifier () adapted to restore the losses of said modulator-attenuator () , and at least one low-pass filter () adapted to limit the band to the desired one , said radio frequencies being comprised between 1 MHz and 15 MHz; said medical apparatus further internally comprising a third unit () comprising: at least one pre-driver and at least one RF broadband power amplifier for the signals coming from said second unit () up to a power of 200 watts; a fourth unit () comprising: at least one RF power filter inserted by the microprocessor () depending on the frequency generated by the DDS (); a fifth unit () comprising: ...

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Номер записи: 56
24-01-2019 дата публикации

DEVICES AND METHODS FOR OPTICAL DETECTION OF TISSUE CONTACT

Номер: US20190021780A1
Автор: Brannan Joseph D.
Принадлежит:

An electrosurgical system includes an energy applicator adapted to direct energy to tissue, an electrosurgical power generating source, and a surface-contact detection device. The surface-contact detection device is operably associated with the energy applicator. The surface-contact detection device is communicatively-coupled to the electrosurgical power generating source. The surface-contact detection device includes at least one optical transmitter to generate optical signals, a lens member configured to reflect optical signals generated by the optical transmitter when the lens member is disposed in contact with tissue, and at least one optical receiver to receive optical signals reflected by the lens member. The electrosurgical power generating source is adapted to transmit energy to the energy applicator when it is determined that the lens member is disposed in contact with tissue. 118-. (canceled)19. A method of delivering electrosurgical energy to tissue , comprising:positioning an antenna assembly having a waveguide for delivery of energy to tissue, the waveguide having a plurality of dielectric layers disposed coaxially with a longitudinal axis defined by the waveguide;generating a signal from a surface-contact detection device;determining a position of the antenna assembly based on a response to the generated signal; anddelivering energy to tissue via the waveguide based on the determined position of the antenna assembly.20. The method according to claim 19 , wherein the plurality of dielectric layers are disposed within a cavity defined by an electrically conductive surface.21. The method according to claim 19 , wherein generating the signal includes generating an optical signal from the surface-contact detection device.22. The method according to claim 19 , wherein generating the signal includes generating an optical signal from the surface-contact detection device and the response to the signal is a reflection of the signal.23. The method according to ...

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Номер записи: 57
22-01-2015 дата публикации

IMPEDANCE MEDIATED CONTROL OF POWER DELIVERY FOR ELECTROSURGERY

Номер: US20150025529A1
Автор: Koss Tim, Taimisto Miriam H., Varner Roseanne
Принадлежит:

In a method of controlling electrosurgical power delivery based on a comparison of sensed tissue impedance to various impedance threshold values, energy is delivered to tissue in a sealing cycle as a series of pulses. An initial pulse has a profile with a preset energy starting value that increases at a ramping rate to a preset end value. Sensed impedance data are monitored throughout each pulse and compared to an impedance threshold value for RF setpoint, an impedance threshold value for cumulative time, and an impedance threshold value for energy cutback. Based on sensed impedance during a pulse, the profile of a subsequent pulse can be modified. In a high impedance event that reflects low tissue presence, energy may be cutback. A sealing cycle is stopped when a cumulative amount of time with an impedance value over the impedance cumulative time threshold value reaches a sealing cycle duration limit. 148.-. (canceled)49. A method comprising the steps of:A. delivering energy from an electrosurgical device to a target tissue in a sealing cycle comprising a series of pulses, the series beginning with an initial pulse having a profile comprising a preset RF level start value that increases at a preset ramping rate to a preset RF end value;B. comparing sensed impedance values of the target tissue to each of three preset impedance threshold values, these threshold values comprising an impedance threshold value for RF setpoint, an impedance threshold value for cumulative time, and an impedance threshold value for energy cutback; andC. controlling the delivery of energy during the sealing cycle by responding to the comparison of the sensed impedance values to the impedance threshold values.50. The method of wherein the step of controlling the delivery of energy during the sealing cycle by responding to the comparison of the sensed impedance values to the impedance threshold values comprises ceasing the sealing cycle when a cumulative time of tissue showing an impedance ...

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Номер записи: 58
23-01-2020 дата публикации

SYSTEM FOR MANAGING HIGH IMPEDANCE CHANGES IN A NON-THERMAL ABLATION SYSTEM FOR BPH

Номер: US20200022748A1
Автор: Kroll Kai, Kroll Mark W.
Принадлежит:

A protection circuit for a direct-current (DC) ablation prostate therapy system. The protection circuit is selectively coupled to a power source that provides DC constant current to a plurality of electrodes in a catheter configured to deliver DC ablation therapy to prostrate tissue. The protection circuit is controlled by a controller and a switching circuit to buffer energy from the power source in response to a monitoring circuit that monitors at least one parameter of the DC ablation therapy, such as voltage or impedance. The controller is configured to selectively activate the switching circuit based on the monitoring circuit detecting an undesirable increase in the energy delivered for the DC ablation therapy. 1. A direct current (DC) prostrate ablation therapy system comprising:a catheter including a plurality of electrodes configured to deliver a DC ablation therapy to prostrate tissue;a power source configured to supply a DC current to the plurality of electrodes;an overload protection device configured to buffer energy from the power source;a monitoring circuit configured to monitor a voltage of the DC ablation therapy;a switching circuit configured to selectively control a path of the DC current from the power source to the plurality of electrodes and the overload protection device; anda controller configured to selectively activate the switching circuit in response to the monitoring circuit detecting an undesirable increase in the voltage delivered for the DC ablation therapy.2. The system of claim 1 , wherein the power source is configured to selectively supply the DC current as a constant current of between 10 to 50 mA of direct current.3. The system of claim 1 , wherein the overload protection device comprises at least one capacitor.4. The system of claim 1 , wherein each of the plurality of electrodes comprises at least one anode and at least one cathode.5. The system of claim 4 , wherein each anode of each of the plurality of electrodes is ...

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Номер записи: 59
01-02-2018 дата публикации

Radio-frequency electrical membrane breakdown for the treatment of adipose tissue and removal of unwanted body fat

Номер: US20180028260A1
Автор: David G. Bostwick, Gary M. Onik, James A. Miessau
Принадлежит: RFEMB HOLDINGS LLC

An imaging, guidance, planning and treatment system integrated into a single unit or assembly of components, and a method for using same, that can be safely and effectively deployed to treat and ablate unwanted masses of adipose tissue in all medical settings, including in a physician's office or in an outpatient setting. The system utilizes the novel process of Radio-Frequency Electrical Membrane Breakdown (‘EMB’* or “RFEMB”) to destroy the cellular membranes of unwanted adipose tissue without damaging sensitive anatomical structures in the treatment, area. The system preferably comprises at least one EM B treatment probe 20, at least one ultrasound scanner, at least one trackable anesthesia needle 300, and at least one controller unit for at least partially automating the treatment process.

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Номер записи: 60
29-01-2015 дата публикации

SYSTEMS AND METHODS FOR MEASURING TISSUE IMPEDANCE THROUGH AN ELECTROSURGICAL CABLE

Номер: US20150032098A1
Автор: FORD CAROLYN G., LARSON ERIC J., WASKIEWICZ ALEXANDER M.
Принадлежит: COVIDIEN LP

The electrosurgical systems and methods of the present disclosure include a tissue resistance measurement system that compensates for capacitive parasitics in a cable connecting an electrosurgical generator to and electrosurgical cable to estimate the real resistance of a tissue load. The electrosurgical generator includes an output stage coupled to an electrical energy source and generates electrosurgical energy. The electrosurgical generator includes a plurality of sensors sensing a voltage and current of the electrosurgical energy and a controller controlling the output stage. The controller includes a calculator that calculates a real part of an impedance based on the sensed voltage and current, an estimator that estimates a resistance of the tissue using a solution to a quadratic equation that is a function of the real part of the impedance, and a control signal generator configured to generate a control signal for the output stage based on the resistance of the tissue. 1. An electrosurgical generator that delivers electrosurgical energy to tissue via an electrosurgical cable and an electrosurgical instrument , the electrosurgical generator comprising:an output stage coupled to an electrical energy source and configured to generate electrosurgical energy to the electrosurgical instrument;a plurality of sensors configured to sense a voltage waveform and a current waveform of the generated electrosurgical energy; and a calculator configured to calculate a real part of impedance based on the sensed voltage and current waveforms;', 'an impedance compensator configured to correct a target impedance curve using a solution to a quadratic equation that models the reactive components of the electrosurgical cable; and', 'a control signal generator configured to generate a control signal to control the output stage so that the calculated real part of the impedance tracks the corrected target impedance curve., 'a controller configured to control the output stage to ...

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Номер записи: 61
29-01-2015 дата публикации

SYSTEMS AND METHODS FOR MEASURING TISSUE IMPEDANCE THROUGH AN ELECTROSURGICAL CABLE

Номер: US20150032099A1
Автор: FORD CAROLYN G., LARSON ERIC J., WASKIEWICZ ALEXANDER M.
Принадлежит: COVIDIEN LP

The electrosurgical systems and methods of the present disclosure include a tissue resistance measurement system that compensates for capacitive parasitics in a cable connecting an electrosurgical generator to and electrosurgical cable to estimate the real resistance of a tissue load. The electrosurgical generator includes an output stage coupled to an electrical energy source and generates electrosurgical energy. The electrosurgical generator includes a plurality of sensors sensing a voltage and current of the electrosurgical energy and a controller controlling the output stage. The controller includes a calculator that calculates a real part of an impedance based on the sensed voltage and current, an estimator that estimates a resistance of the tissue using a solution to a quadratic equation that is a function of the real part of the impedance, and a control signal generator configured to generate a control signal for the output stage based on the resistance of the tissue. 1. An electrosurgical generator that delivers electrosurgical energy to tissue via a cable and an instrument coupled to the cable , the electrosurgical generator comprising:an output stage coupled to an electrical energy source and configured to generate electrosurgical energy;a plurality of sensors configured to sense a voltage waveform and a current waveform of the generated electrosurgical energy; and a calculator configured to calculate a real part of an impedance based on the sensed voltage and current waveforms;', 'an estimator configured to estimate a resistance of the tissue using a solution to a quadratic equation that is a function of a real part of the impedance; and', 'a control signal generator configured to generate a control signal based on the resistance of the tissue., 'a controller configured to control the output stage, the controller comprising2. The electrosurgical generator according to claim 1 , wherein the estimator uses the calculated real part of the impedance value as ...

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Номер записи: 62
29-01-2015 дата публикации

SYSTEMS AND METHODS FOR OPERATING AN ELECTROSURGICAL GENERATOR

Номер: US20150032100A1
Автор: ANDERSON SARA E., COULSON REBECCA J., COUTURE GARY M., MANLEY Prakash
Принадлежит: COVIDIEN LP

The systems and methods according to embodiments of the present disclosure provide optimal tissue effect during an electrosurgical procedure. A system and method for controlling an electrosurgical generator is provided including sensing an impedance of target tissue; generating electrosurgical energy in a first phase at a first power level until the sensed impedance of the target tissue is greater than a first threshold impedance; generating a plurality of pulses of electrosurgical energy in a second phase at a second power level, each pulse being generated until the sensed impedance of the target tissue is greater than a second threshold impedance set for that pulse; and generating at least one high-voltage pulse in a third phase at a third power level for a predetermined duration to divide the target tissue. 1. A method for controlling an electrosurgical generator , the method comprising:sensing an impedance of target tissue;generating electrosurgical energy in a first phase at a first power level until the sensed impedance of the target tissue is greater than a first threshold impedance;generating a plurality of pulses of electrosurgical energy in a second phase at a second power level, each pulse being generated until the sensed impedance of the target tissue is greater than a second threshold impedance set for that pulse; andgenerating at least one high-voltage pulse in a third phase at a third power level for a predetermined duration to divide the target tissue.2. The method according to claim 1 , further comprising generating electrosurgical energy in an impedance sense phase at a fourth power level to sense an initial tissue impedance of the target tissue.3. The method according to claim 2 , wherein the first threshold impedance is equal to a predetermined impedance rise amount above the initial tissue impedance.4. The method according to claim 2 , wherein the second threshold impedance is equal to an adjustable impedance rise amount above the initial tissue ...

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Номер записи: 63
11-02-2016 дата публикации

Cardiac tissue elasticity sensing

Номер: US20160038039A1
Автор: Hauck John A.
Принадлежит:

A system and method are provided for assessing the compliance of internal patient tissue for purposes of catheter guidance and/or ablation procedures. Specifically, the system/method provides for probing internal patient tissue in order to obtain force and/or tissue displacement measurements. These measurements are utilized to generate an indication of tissue elasticity. In one exemplary embodiment, the indication of elasticity is correlated with an image of the internal tissue area and an output of this image including elasticity indications is displayed for a user. 128-. (canceled)29. A method , comprising:receiving a first force signal from a catheter as the catheter is displaced relative to an internal tissue location;receiving a first displacement signal indicative of movement of the catheter between a reference position and the internal tissue location; andprocessing said first force signal and said first displacement signal to generate a tissue characteristic value for the internal tissue location.30. The method of claim 29 , further comprising:selecting a level of ablation power based at least in part on said tissue characteristic value; andproviding said level of ablation power to an ablation electrode disposed proximate to a distal end of the catheter.31. The method of claim 30 , wherein said level of ablation power is selected at least in part to control a lesion dimension created at the internal tissue location by said providing said ablation power.32. The method of claim 29 , wherein generating said tissue characteristic value comprises generating a tissue elasticity value for the internal tissue location.33. The method of claim 29 , wherein generating said tissue characteristic value comprises generating an ablation lesion characterization for the internal tissue location.34. The method of claim 29 , further comprising:receiving a second force signal from the catheter as displaced relative to the internal tissue location;receiving a second displacement ...

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Номер записи: 64
11-02-2016 дата публикации

Monitoring and Controlling Energy Delivery of an Electrosurgical Device

Номер: US20160038216A1
Автор: Dandy Jonathan, Juzkiw Taras, Woo Jason
Принадлежит:

A method is disclosed for delivering energy to a region of tissue within a patient's body using a medical treatment system. The medical treatment system comprises an energy delivery device coupled to an energy source and the method includes steps of delivering energy, measuring an energy delivery parameter, determining distance of the energy delivery device from a conductive object and optionally adjusting a position of the energy delivery device based on the determined distance. 1. A method is disclosed for delivering energy to a region of tissue within a patient's body using a medical treatment system , the medical treatment system comprising a medical device coupled to an energy delivery source , the method comprising the steps of:(1) delivering energy from the medical device;(2) advancing the medical device while delivering the energy;(3) measuring an energy delivery parameter while advancing the medical device;(4) detecting whether or not a value of the energy delivery parameter crosses a threshold;(5) if the threshold is crossed, thereby indicating proximity of the medical device to a conductive object, determining a relative distance between the medical device and the conductive object based on one or more detected values of the energy delivery parameter;(6) comparing the relative distance determined as the device is being advanced to determine if the distance between the medical device and metal object is decreasing; and(7) upon determining that the distance between the medical device and the conductive object is decreasing, adjusting a position of the medical device and repeating steps (3)-(7) until the medical device is positioned at a desired distance from the conductive object.2. The method of claim 1 , wherein the step of adjusting a position of the medical device comprises moving the medical device away from the conductive object until the value of the energy delivery parameter no longer exceeds the threshold.3. The method of claim 1 , wherein the ...

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Номер записи: 65
11-02-2016 дата публикации

TISSUE CONTACT DETECTION PRIOR TO AND DURING AN ABLATION PROCEDURE

Номер: US20160038229A1
Автор: Allison Robert C., Kanowsky Eric R., Lenihan Timothy J., McCarthy John F.
Принадлежит:

The present invention provides systems and methods for radiometrically measuring temperature and detecting tissue contact during ablation. An interface module includes a first input/output (I/O) port for receiving radiometer and thermocouple signals from an integrated catheter tip (ICT) that includes a radiometer; a second I/O port for receiving ablative energy from an electrosurgical generator; a temperature display; a patient relay; a computer-readable medium storing radiometer and thermocouple parameters and instructions for causing the processor to: calculate a temperature adjacent to the ICT based on the radiometer and thermocouple signals and the parameters; causing the temperature display to display the calculated temperature; closing the patient relay to pass ablative energy from the second to the first I/O port; determining whether the ICT is in contact with tissue based on the radiometer signal. An output device indicates whether the ICT is determined to be in contact with the tissue. 1. A method of using an interface module with an ablation energy generator and an integrated catheter tip (ICT) , the ICT including a radiometer , an ablative tip , and a thermocouple , the method of using the interface module comprising the steps of:(a) receiving at a first I/O port of the interface module a radiometer signal and a thermocouple signal from the ICT;(b) receiving at a second I/O port of the interface module ablative energy from the ablation energy generator;(c) calculating at the interface module a temperature adjacent to the ICT based on the radiometer signal, the thermocouple signal, and the operation parameters;(d) determining at the interface module whether the ICT is in contact with tissue based on the radiometer signal;(e) outputting with an output device an indication of the interface module's determination of whether the ICT is in contact with the tissue;(f) displaying on a temperature display of the interface module the calculated temperature; and(g) ...

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Номер записи: 66
08-02-2018 дата публикации

CONTROLLING IMPEDANCE RISE IN ELECTROSURGICAL MEDICAL DEVICES

Номер: US20180036061A1
Автор: Davison Mark A., Messerly Jeffrey D., Yates David C.
Принадлежит:

Various embodiments are directed to electrosurgical systems for providing an electrosurgical signal to a patient. A control circuit may, for a first application period, apply the electrosurgical signal to first and second electrodes according to a first mode. In the first mode, the control circuit may limit the electrosurgical signal to a first maximum power when the impedance between the first and second electrodes exceeds a first mode threshold. The control circuit may also, for a second application period after the first application period, apply the electrosurgical signal according to a second mode. In the second mode, the control circuit may limit the electrosurgical signal to a second mode maximum power when the impedance between the first and second electrodes exceeds a second mode threshold. The second maximum power may be greater than the first maximum power. 110-. (canceled)11. A method for providing an electrosurgical signal to a patient using an electrosurgical system , the method comprising:for a first application period, applying the electrosurgical signal to first and second electrodes of the electrosurgical system according to a first mode, wherein in the first mode, the electrosurgical signal is limited to a first maximum power when the impedance between the first and second electrodes exceeds a first mode threshold; andfor a second application period after the first application period, applying the electrosurgical signal according to a second mode, wherein in the second mode, the electrosurgical signal is limited to a second mode maximum power when the impedance between the first and second electrodes exceeds a second mode threshold, wherein the second maximum power is greater than the first maximum power.12. The method of claim 11 , wherein the first mode threshold is less than the second mode threshold.13. The method of claim 11 , further comprising:for a third application period after the second application period, applying the electrosurgical ...

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Номер записи: 67
24-02-2022 дата публикации

METHODS OF DELAYED ENERGY ACTIVATION FOR ELECTROSURGICAL TOOLS IN ROBOTIC SURGICAL SYSTEMS

Номер: US20220054187A1
Автор: BROGNA Salvatore J., Goldberg Randal P., Hanuschik Michael, Mohr Paul W., Nixon Thomas R., Robinson David W.
Принадлежит:

Methods for minimally invasive electro-surgical systems are disclosed. One method includes determining if an input device is selected at a control console. If the input device is selected then, providing feedback to a user of the selection of the input device, delaying a first predetermined period of time for the user to receive the feedback, determining if the input device is deselected, and if not deselected, then activating an electrosurgical device to couple energy to tissue. If deselected, the method skips activation of the electrosurgical device. While active, a method includes determining if the input device is deselected, and if so, then deactivating the electrosurgical device, determining if the input device is reselected and if the input device is not reselected, then waiting and determining if a second predetermined period of time has lapsed prior to reselection of the input device and if not, then repeating the reselected determining step. 1. A method for a minimally invasive electro-surgical system , the method comprising:determining if a user input device is selected at a control console; providing feedback to a user of the selection of the user input device,', 'delaying a first predetermined period of time for the user to receive the feedback,', 'determining if the user input device is deselected, and', 'if the user input device is not deselected, then activating an electrosurgical device to couple electrosurgical energy to tissue., 'if the user input device is selected then,'}2. The method of claim 1 , further comprising:if the user input device is deselected, then skipping activation of the electrosurgical device.3. The method of claim 2 , wherein if the user input device is deselected claim 2 , further comprising:swapping energy control from a first electrosurgical tool to a second electrosurgical tool; andrepeating the determining if the user input device is selected at the control console.4. The method of claim 1 , whereinthe feedback provided to ...

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Номер записи: 68
18-02-2021 дата публикации

SYSTEMS AND METHODS FOR ACTIVATING TRANSDUCERS

Номер: US20210045689A1
Автор: Bisalputra Danai, Louie Roxanne Wai Tak, Reinders Daniel Martin, Weinkam Daniel Robert
Принадлежит:

Transducer-based systems and methods may be configured to display a graphical representation of a transducer-based device, the graphical representation including graphical elements corresponding to transducers of the transducer-based device, and also including between graphical elements respectively associated with a set of the transducers and respectively associated with a region of space between the transducers of the transducer-based device. Selection of graphical elements and/or between graphical elements can cause activation of the set of transducers associated with the selected elements. Transducer activation characteristics, such as initiation time, activation duration, activation sequence, and energy delivery characteristics, can vary based on numerous factors. Visual characteristics of graphical elements and between graphical elements can change based on an activation-status of the corresponding transducers. Activation requests for a set of transducers can be denied if it is determined that a transducer in the set of transducers is unacceptable for activation. 1. (canceled)2. A transducer activation system comprising:a data processing device system;an input-output device system communicatively connected to the data processing device system; anda memory device system communicatively connected to the data processing device system and storing a program executable by the data processing device system,wherein the data processing device system is configured by the program at least to:cause reception, via the input-output device system, of user-based input indicating at least a selection of transducers from a plurality of transducers of a transducer-based device, the selected transducers activatable to form an ablation path in tissue; andcause activation, via the input-output device system and at least in part in response to the user-based input indicating at least the selection of the transducers, of multiple transducer sets from the selected transducers,wherein ...

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Номер записи: 69
18-02-2021 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR ABLATION USING SURGICAL CLAMPS

Номер: US20210045798A1
Автор: Long Gary L., VISWANATHAN Raju
Принадлежит: Farapulse, Inc.

Systems, devices, and methods for electroporation ablation therapy are disclosed, with the device including a first jaw including a plurality of first electrodes and a second jaw including a plurality of second electrodes. The first jaw and the second jaw may be substantially rigid, elongate, and collectively define a longitudinal axis. The first jaw and the second jaw may be configured to engage tissue therebetween during use. 120.-. (canceled)21. An apparatus , comprising:a first jaw and a second jaw, the first jaw and the second jaw being substantially rigid, elongate, and collectively defining a longitudinal axis, the first jaw and the second jaw further configured to engage tissue therebetween during use;a first plurality of electrodes disposed on a side of the first jaw facing the second jaw, each electrode of the plurality of first electrodes having, within a cross-section of the apparatus that is orthogonal to the longitudinal axis, a width that is less than a length of that electrode, the plurality of first electrodes spaced apart laterally with respect to the longitudinal axis;a second plurality of electrodes disposed on a side of the second jaw facing the first jaw, each electrode of the plurality of second electrodes having, within the cross-section, a width that is less than a length of that electrode, the plurality of second electrodes spaced apart laterally with respect to the longitudinal axis; and configure a first electrode of the first plurality of electrodes to have a first polarity;', 'configure a second electrode of the second plurality of electrodes to have a second polarity opposite the first polarity;', 'deliver a pulsed waveform to the first and second electrodes such that the first and second electrodes generate an electric field that forms a contiguous ablation zone that extends from the first electrode to the second electrode without having to overlap with an electric field generated by any other electrodes of the first and second ...

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Номер записи: 70
18-02-2021 дата публикации

TOKEN-BASED ELECTROSURGICAL INSTRUMENT ACTIVATION

Номер: US20210045804A1
Автор: Deane Gordon Thomas, Roberts Paul Christopher, Schofield Simon
Принадлежит:

An electrosurgical connection unit for a surgical robot arm to connect an electrosurgical instrument attached to the arm to an electrosurgical generator. The electrosurgical connection unit includes an input port connectable to the electrosurgical generator, the input port configured to receive a driving electrosurgical signal and output one or more activation signals; an output port connectable to the electrosurgical instrument, the output port configured to output the driving electrosurgical signal received on the input port; one or more activation switch units, wherein activation of an activation switch unit causes an activation signal to be output from the input port indicating a driving electrosurgical signal with a desired waveform is to be activated; and a control unit configured to selectively activate one of the one or more activation switch units in response to a control signal. 120-. (canceled)21. A method of activating an electrosurgical instrument attached to a surgical robot arm , the method comprising:generating, at a surgical robot arm control unit, a token comprising information indicating a time at which the token was generated;transmitting the token from the surgical robot arm control unit to an external computing device;receiving the token at the external computing device;in response to the external computing device receiving input indicating that the electrosurgical instrument is to be activated, transmitting a modified version of the received token to the surgical robot arm control unit, the modified version of the token indicating that the electrosurgical instrument is to be activated; andif the surgical robot arm control unit receives the modified version of the token within a threshold amount of time from when the token was generated, outputting one or more signals that cause the electrosurgical instrument to be activated.22. The method of claim 21 , further comprising periodically incrementing a rolling counter at the surgical robot arm ...

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Номер записи: 71
18-02-2016 дата публикации

SYSTEM AND METHOD FOR TESTING ELECTROSURGICAL GENERATORS

Номер: US20160045249A1
Автор: Behnke, Frushour Scott E.M., II Robert J., Valentyik Peter L.
Принадлежит:

A system is provided. The system includes an electrosurgical generator configured to measure, collect and record data pertaining to a characteristic of tissue as the tissue is being electrosurgically treated. A tuner configured to couple to the electrosurgical generator includes a tuning circuit providing a load having a variable complex impedance for the electrosurgical generator when the electrosurgical generator is connected thereto. A controller including stored data pertaining to impedance values is in operable communication with the electrosurgical generator for retrieving the recorded data pertaining to the characteristic of tissue. The controller is in operable communication with the tuner for varying a complex impedance of the load. The controller configured to compare the recorded data pertaining to the at least one characteristic of tissue with the stored data pertaining to the plurality of impedance values and to adjust the tuner to one of the plurality of impedance values. 120-. (canceled)21. A system , comprising:an electrosurgical generator configured to output energy;a tuner coupled to the electrosurgical generator and including at least one tuning circuit configured to provide a simulated tissue load having a variable complex impedance for the electrosurgical generator; anda controller coupled to the electrosurgical generator and the tuner, the controller including stored data pertaining to a plurality of complex impedance values, the controller configured to vary the variable complex impedance of the tuner based on at least one of the plurality of impedance values during diagnostic testing of the electrosurgical generator.22. The system according to claim 21 , further comprising a step motor coupled to the controller and the tuner claim 21 , the controller being configured to activate the step motor to vary the variable complex impedance of the tuner.23. The system according to claim 22 , further comprising an impedance analyzer operably coupled to ...

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Номер записи: 72
12-02-2015 дата публикации

System for treating gastric reflux by tightening a lower esophageal sphincter

Номер: US20150045786A1
Автор: EDWARDS STUART D., Gaiser John W., Utley David S.
Принадлежит: Mederi Therapeutics, Inc.

A method of treating a sphincter provides a sphincter electropotential mapping device with at least one of a mapping electrode or a treatment electrode. The sphincter electropotential mapping device is introduced into at least a portion of the sphincter, the lower esophageal sphincter, stomach, the cardia or the fundus. Bioelectric activity causing a relaxation of the sphincter is detected and energy is delivered from either the mapping electrode or the treatment electrode to treat the bioelectric activity. A method of treating a sphincter provides a sphincter electropotential mapping device with at least one of a mapping electrode or a treatment electrode. The sphincter electropotential mapping device is introduced into at least a portion of the sphincter, the lower esophageal sphincter, stomach, the cardia or the fundus. Bioelectric activity causing a relaxation of the sphincter is detected and energy is delivered from either the mapping electrode or the treatment electrode to treat the bioelectric activity. 13-. (canceled)4. A system for regulating temperature at a tissue site during treatment of gastroesophageal reflux disease , the system comprising:a device having a plurality of electrodes, a tissue temperature measuring device attached to the electrodes for producing a signal representative of a measured tissue temperature at an interface between the electrodes and tissue, the electrodes advanceable from a retracted position within the device to an extended position extending from the device to apply energy to the lower esophageal sphincter to form lesions to tighten the sphincter to treat gastroesophageal reflux disease;a power source to apply energy to the plurality of electrodes, the power source having multiple channels to deliver separately modulated power to the plurality of electrodes such that individual electrodes of the plurality of electrodes generate an independent output, the tissue temperature measuring device coupled to the power source, and ...

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Номер записи: 73
15-02-2018 дата публикации

HIGH-FREQUENCY GENERATOR FOR ELECTRIC SURGICAL INSTRUMENT

Номер: US20180042663A1
Автор: TAKAMI Sadayoshi
Принадлежит: OLYMPUS CORPORATION

A high-frequency generator for an electric surgical instrument that treats a living tissue includes a power supply that generates a power, and a resonant circuit that excites a high-frequency signal. The resonant circuit includes a parallel resonant circuit which is connected to the power supply, and a series resonant circuit which is coupled to the parallel resonant circuit and is connected to the electric surgical instrument. The parallel resonant circuit has a higher parallel resonant frequency than a series resonant frequency of the series resonant circuit. 1. A high-frequency generator for an electric surgical instrument that treats a living tissue , the high-frequency generator comprising:a power supply that generates a power; anda resonant circuit that includes a parallel resonant circuit and a series resonant circuit, and excites a high-frequency signal based on the power, the parallel resonant circuit being connected to the power supply, the series resonant circuit being coupled to the parallel resonant circuit and being connected to the electric surgical instrument,wherein the parallel resonant circuit has a higher parallel resonant frequency than a series resonant frequency of the series resonant circuit.2. The high-frequency generator according to claim 1 , wherein the parallel resonant frequency is set based on an amount of variation in a frequency of the high-frequency signal caused by variation in a load of the living tissue with which the electrical surgical instrument is brought in contact.3. The high-frequency generator according to claim 1 , wherein the series resonant circuit is coupled to the parallel resonant circuit through a transformer.5. The high-frequency generator according to claim 1 , wherein the series resonant circuit includes a second coil and a second condenser that are connected in series.6. The high-frequency generator according to claim 5 , further comprising a third condenser that is connected in parallel with respect to the ...

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Номер записи: 74
01-05-2014 дата публикации

CARDIAC TISSUE ELASTICITY SENSING

Номер: US20140121660A1
Автор: Hauck John A.
Принадлежит: St. Jude Medical, Atrial Fibrillation Division, Inc.

A system and method are provided for assessing the compliance of internal patient tissue for purposes of catheter guidance and/or ablation procedures. Specifically, the system/method provides for probing internal patient tissue in order to obtain force and/or tissue displacement measurements. These measurements are utilized to generate an indication of tissue elasticity. In one exemplary embodiment, the indication of elasticity is correlated with an image of the internal tissue area and an output of this image including elasticity indications is displayed for a user. 1. A medical system comprising: a distal portion having an ablation electrode;', 'a contact surface; and', 'a force sensor adapted to measure a force exerted on said contact surface;, 'a catheter configured for disposition to an internal tissue location, said catheter includinga measurement device operative to measure force outputs from said force sensor;a catheter displacement sensor associated with said catheter and being operative to generate movement outputs indicative of movement of said catheter relative to a reference position; anda tissue elasticity assessment module configured to generate an indication of elasticity for tissue contacted by said contact surface based on said movement outputs and said force outputs of said force sensor.2. The system of claim 1 , further comprising:a positioning system operative to measure responses of said catheter displacement sensor to an applied signal, wherein said responses comprise said movement outputs.3. The system of claim 1 , wherein said catheter displacement sensor is disposed in or on said catheter.4. The system of claim 1 , wherein said catheter displacement sensor comprises one or more electrodes disposed in or on said catheter.5. The system of claim 1 , further comprising:a signal generator adapted to provide power to said ablation electrode, wherein a level of said power is selected based at least in part on said indication of elasticity.6. The ...

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Номер записи: 75
14-02-2019 дата публикации

TISSUE ABLATION WITH IRREVERSIBLE ELECTROPORATION

Номер: US20190046255A1
Автор: Davalos Rafael, Rubinsky Boris
Принадлежит: The Regents of the University of California

A new method for the ablation of undesirable tissue such as cells of a cancerous or non-cancerous tumor is disclosed. It involves the placement of electrodes into or near the vicinity of the undesirable tissue through the application of electrical pulses causing irreversible electroporation of the cells throughout the entire area of the undesirable tissue. The electric pulses irreversibly permeate the cell membranes, thereby invoking cell death. The irreversibly permeabilized cells are left in situ and are removed by the body immune system. The amount of tissue ablation achievable through the use of irreversible electroporation without inducing thermal damage is considerable. 1. A method of ablating tissue cells , comprising the steps of:placing one or more electrodes near the tissue cells;applying a set of electrical pulses through the one or more electrodes, the set of electrical pulses comprised of at least one individual pulse having a pulse length of no more than 100 microseconds, the set of electrical pulses is applied in an amount sufficient to induce irreversible electroporation of the tissue cells but is insufficient to induce thermal damage to substantially all of the tissue cells such that the tissue cells are ablated by irreversible electroporation.2. The method of claim 1 , wherein the set of electrical pulses are applied for a duration in a range of from about 5 microseconds to about 62 seconds.3. The method of claim 1 , wherein at least one individual pulse of the applied set of electrical pulses has a pulse length of no more than 5 microseconds.4. The method of claim 1 , wherein at least 15 individual pulses are applied.5. The method of claim 1 , wherein at least 8 pulses are applied claim 1 , each of the 8 pulses have a pulse length up to 100 microseconds.6. The method of claim 1 , wherein the applied set of electrical pulses produce a voltage gradient up to 8000 volt/cm.7. The method of claim 1 , wherein a first electrode is placed at about 5 mm to ...

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Номер записи: 76
14-02-2019 дата публикации

METHOD FOR EMPLOYING SINGLE FAULT SAFE REDUNDANT SIGNALS

Номер: US20190046256A1
Автор: KRAPOHL James E.
Принадлежит:

An electrosurgical system includes an electrosurgical instrument coupled to an electrosurgical generator. The electrosurgical system may include a first sensor and a second sensor, which are configured to detect redundant tissue properties and output a signal corresponding thereto. The electrosurgical system has a signal processing circuit for receiving and modifying the output signal from the second sensor. The electrosurgical generator may include a controller for receiving an output signal from the first sensor and a processed signal from the signal processing circuit. The controller compares the two signals received and shuts down the system based on the comparison of the first sensor and a processed signal. 117-. (canceled)18. An electrosurgical system , comprising:a signal processing circuit operably coupled to a first sensor, that measures at least one property of electrosurgical energy and outputs a first signal, and a second sensor, that measures the at least one property of the electrosurgical energy and outputs a second signal, the signal processing circuit configured to receive the second signal, to modify the second signal, and to output a processed signal; and receive the first signal and the processed signal;', 'compare the first signal and the processed signal;', 'convert the processed signal back to the second signal when a difference between the first signal and the processed signal exceeds a predetermined amount;', 'compare the first signal to the second signal converted from the processed signal; and', 'terminate an output of electrosurgical energy when the first signal and the processed signal are substantially identical., 'a controller configured to19. The electrosurgical system according to claim 18 , wherein the signal processing circuit is configured to delay the second signal for a predetermined period of time before outputting the processed signal.20. The electrosurgical system according to claim 18 , wherein the signal processing circuit ...

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Номер записи: 77
14-02-2019 дата публикации

DISENGAGEMENT MECHANISM FOR ELECTROSURGICAL FORCEPS

Номер: US20190046259A1
Автор: BATCHELOR Kester J., Blus Theodore C., Curtis Richard J., Windgassen Ryan J.
Принадлежит:

An electrosurgical forceps comprising: (a.) a pair of working arms comprising; (i.) a first working arm and a second working arm, each of the first working arm and the second working arm having an inner surface; (ii.) one or more electrodes located on the inner surface of the first working arm, the second working arm, or both; and (b.) a selectively engageable activation system comprising; (i.) a control unit; (ii.) an activation switch; and (iii.) a disengagement mechanism; wherein the first working arm and the second working arm are laterally movable relative to each other so that the activation switch is actuated when the disengagement mechanism is in an engaged position by closing the first working arm and the second working arm together, sending a signal to the control unit, which in turn sends a therapy signal to the one or more electrodes; wherein when the disengagement mechanism is in a disengagement position and the working arms are closed, the therapy signal is prevented from being sent from the control unit to the one or more electrodes. 1. An electrosurgical forceps comprising: i. a first working arm and a second working arm, each of the first working arm and the second working arm having an inner surface;', 'ii. one or more electrodes located on the inner surface of the first working arm, the second working arm, or both; and, 'a. a pair of working arms comprising;'} i. a control unit;', 'ii. an activation switch; and', 'iii. a disengagement mechanism;, 'b. a selectively engageable activation system comprising;'}wherein the first working arm and the second working arm are laterally movable relative to each other so that the activation switch is depressed by the disengagement mechanism when the disengagement mechanism is in an engaged position by closing the first working arm and the second working arm together, sending a signal to the control unit, which in turn sends a therapy signal to the one or more electrodes;wherein when the disengagement mechanism ...

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Номер записи: 78
25-02-2016 дата публикации

Surgical forceps and latching system

Номер: US20160051273A1
Автор: Kester J. Batchelor, Richard J. Curtis, Ryan J. Windgassen
Принадлежит: Gyrus ACMI Inc

A surgical forceps comprising: a first working arm and a second working arm configured to move towards and away from each other; and an electromagnetic latching system; wherein the electromagnetic latching system is configured to create a force that is in a direction aligned with closing of the forceps or opposite to the closing of the forceps when an electromagnetic activation button is depressed.

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Номер записи: 79
23-02-2017 дата публикации

SYSTEMS AND METHODS OF DISCRIMINATING BETWEEN ARGON AND HELIUM GASES FOR ENHANCED SAFETY OF MEDICAL DEVICES

Номер: US20170049496A1
Автор: Konesky Gregory A., Simeonov Borislav S.
Принадлежит:

Systems and methods for discriminating between various gases, e.g., argon and helium, for enhanced safety of medical devices are provided. The present disclosure may take the form of a dedicated-use embodiment where a specific gas, helium for example, is expected, and an enabling or “Go” signal is issued when that gas is detected, or an inhibitory or “No-Go” signal when a gas is present that is not identified as helium. Alternately, a control line or input command can be used to select between helium and argon as the expected gas and then issue the appropriate “Go/No-Go” signal, depending on which gas is identified. 123-. (canceled)24. An apparatus for use with a medical device comprising:at least one gas input configured to receive a gas;a gas discriminator coupled to the at least one gas input and configured to determine a type of the received gas, the gas discriminator further configured to generate a signal indicative of the received gas type;a non-transitory memory that stores a database, the database including signal values for combinations of at least two different gas types; anda controller coupled to the non-transitory memory, the controller configured to receive the received gas type signal, scan the signal values of the database to determine the received gas type based on the received gas type signal and generate a control signal to enable or disable the medical device.25. The apparatus as in claim 24 , wherein the gas discriminator is an ionization timing type gas discriminator.26. The apparatus as in claim 24 , wherein the gas discriminator is an emission spectra type gas discriminator.27. The apparatus as in claim 26 , wherein the emission spectra type gas discriminator is configured to determine a predetermined emission spectra for each of at least two types of gas.28. The apparatus as in claim 24 , wherein the gas discriminator is a differential velocity of propagation type gas discriminator.29. The apparatus as in claim 24 , further comprising a ...

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Номер записи: 80
22-02-2018 дата публикации

ENHANCED CONTROL SYSTEMS INCLUDING FLEXIBLE SHIELDING AND SUPPORT SYSTEMS FOR ELECTROSURGICAL APPLICATIONS

Номер: US20180049800A1
Автор: Biggs Michael John, Jackman Brian, Newton David, SCHREIBER Philip, Taylor Warren
Принадлежит:

A boot for an articulable electrosurgical instrument having a conductor is disclosed. The boot has: a first layer having a flexible substantially non-conductive material; a second layer disposed on the first layer, the second layer having a flexible conductive medium configured to be electrically coupled to at least one shield conductor, whereby the boot is configured to transmit normal current and fault current to a reference potential; and a third layer disposed on the second layer, the third layer having a flexible non-conductive material. 1. A boot for an articulable electrosurgical instrument having a conductor , the boot comprising:a first layer having a flexible substantially non-conductive material;a second layer disposed on the first layer, the second layer having a flexible conductive medium configured to be electrically coupled to at least one shield conductor, whereby the boot is configured to transmit normal current and fault current to a reference potential;and a third layer disposed on the second layer, the third layer having a flexible non-conductive material.2. The boot of claim 1 , wherein:the second layer comprises a conductive cloth.3. The boot of claim 1 , wherein:the second layer comprises a wire mesh.4. The boot of claim 1 , wherein:the second layer comprises a wire braid.5. The electrosurgical instrument of claim 1 , wherein:the boot is corrugated.6. The boot of claim 1 , wherein:the boot comprises a proximal region configured to surround at least a portion of a support structure of the electrosurgical instrument and a distal region configured to partially surround an articulable portion of the electrosurgical instrument; andthe distal region is configured to elastically deform.7. The boot of claim 1 , further comprising:a conductive rubber, a coaxial cable, a metal braid inside an insulation material, or a thin conductive film.8. The boot of claim 1 , wherein:the first layer has a woven matrix;the second layer is a sprayed on conductor; ...

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Номер записи: 81
10-03-2022 дата публикации

IMPEDANCE BASED IRREVERSIBLE-ELECTROPORATION (IRE)

Номер: US20220071692A1
Автор: Altmann Andres Claudio, Govari Assaf
Принадлежит:

An irreversible electroporation (IRE) method includes selecting electrodes of a catheter placed in contact with tissue in an organ, for applying IRE pulses between the selected electrodes. An impedance is measured between the selected electrodes. Based on the measured impedance, an IRE protocol is chosen, that has parameters that meet a predefined safety criterion under the measured impedance. The IRE pulses are applied according to the chosen protocol. 1. An irreversible electroporation (IRE) method , comprising:selecting electrodes of a catheter placed in contact with tissue in an organ, for applying IRE pulses between the selected electrodes;measuring an impedance between the selected electrodes;choosing, based on the measured impedance, an IRE protocol having parameters that meet a predefined safety criterion under the measured impedance; andapplying the IRE pulses according to the chosen protocol.2. The IRE method according to claim 1 , wherein choosing the IRE protocol comprises choosing a pulse width claim 1 , a pulse repetition rate and a number of the IRE pulses.3. The IRE method according to claim 1 , wherein choosing the predefined safety criterion comprises choosing an IRE protocol having an impedance threshold that is lower than the measured impedance claim 1 , thereby ensuring that the IRE pulses will not overheat the tissue.4. The IRE method according to claim 3 , wherein the impedance threshold of the chosen protocol is derived by one of a calculation and a look up table.5. The IRE method according to claim 3 , and comprising:setting an IRE protocol comprising the impedance threshold;measuring the impedance between the selected electrodes and comparing the measured impedance to the given threshold;if the measured impedance is below the threshold, changing the IRE protocol to have a new impedance threshold that is below the measured impedance; andapplying the IRE according to the changed protocol.6. The IRE method according to claim 5 , wherein ...

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Номер записи: 82
10-03-2022 дата публикации

CATHETER WITH DEFORMABLE ELECTRODE

Номер: US20220071698A1
Автор: Bond Jonathan Matthew, Collier Ian, Harlev Doron, Wallace Andrew Miles
Принадлежит:

Ablation systems of the present disclosure facilitate the safe formation of wide and deep lesions. For example, ablation systems of the present disclosure can allow for the flow of irrigation fluid and blood through an expandable ablation electrode, resulting in efficient and effective cooling of the ablation electrode as the ablation electrode delivers energy at a treatment site of the patient. Additionally, or alternatively, ablation systems of the present disclosure can include a deformable ablation electrode and a plurality of sensors that, in cooperation, sense the deformation of the ablation electrode, to provide a robust indication of the extent and direction of contact between the ablation electrode and tissue at a treatment site. 1. A catheter , comprising:a shaft having a distal end portion; anda deformable electrode having (i) a proximal region connected to the distal end portion of the shaft and (ii) a distal region opposite the proximal region,{'claim-text': ['the deformable electrode comprises a plurality of struts that define a plurality of cells,', 'the deformable electrode is transformable between a compressed state and an uncompressed state,', 'when in the uncompressed state, at least some struts of the plurality of struts extend circumferentially with respect to an axis extending between the proximal region and the distal region of the deformable electrode, and', 'when in the uncompressed state, the deformable electrode is configured such that energy can be delivered to target tissue through an outer portion of the deformable electrode at multiple different orientations of the deformable electrode relative to a surface of the target tissue, including at an orientation at which the axis is perpendicular to the surface of the target tissue.'], '#text': 'wherein—'}2. The catheter of wherein claim 1 , for a same amount of the energy delivered to the target tissue through the outer portion of the deformable electrode at a given amount of pressure ...

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Номер записи: 83
03-03-2016 дата публикации

SYSTEM AND METHOD FOR ABLATING A TISSUE SITE BY ELECTROPORATION WITH REAL-TIME PULSE MONITORING

Номер: US20160058493A1
Автор: II Robert, Neal, Thomson Ken
Принадлежит: ANGIODYNAMICS, INC.

A medical system for ablating a tissue site by electroporation with real-time pulse monitoring during an electroporation treatment procedure is provided. The treatment control module monitors applied pulses and detect an abnormal condition that indicates either an ineffective electroporation of the tissue or an imminent excessive current such as a spark event that may exceed the capacity of the pulse generator. Rather than terminating the procedure entirety, the treatment control module temporarily pauses the procedure to allow the user to adjust the pulse parameters so as to complete the procedure without starting the procedure over again. 1. A medical system for ablating a tissue site by electroporation with real-time pulse monitoring during an electroporation treatment procedure , comprising:at least two electrodes adapted to be introduced near a target region of a tissue site of a patient;a pulse generator configured to generate and apply between the electrodes a plurality of electroporation pulses according to selected pulse parameters for ablation of tissue in the target region;a treatment control module adapted to detect an abnormal condition of the applied electrical pulses in real-time during an electroporation treatment procedure and temporarily pause the procedure without termination when the abnormal condition is detected, the abnormal condition indicating that a predetermined current threshold value is about to be exceeded or indicating an ineffective electroporation of the tissue.2. The medical system of claim I , further comprising a display coupled to the pulse generator , wherein the treatment control module:sends an instruction to the pulse generator to pause the generation of pulses, and provides a visual indication at the display device that the abnormal condition has been reached; anddisplays at least one pulse parameter which is adjustable by an operator.3. The medical system of claim 1 , wherein the treatment control module is adapted to send ...

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Номер записи: 84
01-03-2018 дата публикации

IMPLANT MODE FOR ELECTROSURGICAL GENERATOR

Номер: US20180055556A1
Автор: ANDERSON SARA E., BUYSSE Steven P., Dunning James E.
Принадлежит:

Disclosed are devices, systems, and methods for operating an electrosurgical generator, including a radio-frequency (RF) output stage configured to output an electrosurgical waveform, a wireless transceiver configured to communicate with an implantable device in a patient, and a controller coupled to the RF output stage and the wireless transceiver, the controller configured to control the RF output stage to generate an electrosurgical waveform based on the implantable device. 1. An electrosurgical generator , comprising:a radio-frequency (RF) output stage configured to output an electrosurgical waveform;a wireless transceiver configured to communicate with an implantable device disposed in a patient; anda controller coupled to the RF output stage and the wireless transceiver, the controller configured to control the RF output stage to generate an electrosurgical waveform based on the implantable device.2. The electrosurgical generator according to claim 1 , wherein the controller is further configured to:determine a type of the implantable device; andcontrol the generation of the electrosurgical waveform by the RF output stage based on the type of the implantable device.3. The electrosurgical generator according to claim 1 , wherein the controller is further configured to:calculate a control signal for generating the electrosurgical waveform such that the electrosurgical waveform interlaces with a stimulating waveform generated by the implantable device; andcontrol the generation of the electrosurgical waveform by the RF output stage based on the calculated control signal.4. The electrosurgical generator according to claim 3 , wherein the controller calculates the control signal by adjusting at least one of voltage claim 3 , current claim 3 , power claim 3 , duty cycle claim 3 , repetition rate claim 3 , frequency claim 3 , pulse width claim 3 , or harmonic content of the electrosurgical waveform.5. The electrosurgical generator according to claim 1 , wherein the ...

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Номер записи: 85
01-03-2018 дата публикации

ABLATION MANAGEMENT

Номер: US20180055557A1
Автор: GROSS Yossi, Zadok Yehuda
Принадлежит: RAINBOW MEDICAL LTD.

During a dual-signal period, a dual electric signal is applied at a site of a nerve of a subject, and during an ablation-signal period that is separate from the dual-signal period, an ablation electric signal is applied at the site. The dual electric signal has an excitation component and an ablation component, and the ablation electric signal has the ablation component but not the excitation component. Other embodiments are also described. 1. A method , comprising:during a dual-signal period, applying, via an electrode disposed at a site of a nerve of a subject, a dual electric signal that has (i) an excitation component that has a frequency of 20-500 Hz, and (ii) an ablation component that has a frequency of 5 kHz-1 GHz; andduring an ablation-signal period that is separate from the dual-signal period, applying, via the electrode disposed at the site, an ablation electric signal that has the ablation component but not the excitation component.2. The method according to claim 1 , wherein the dual electric signal is a dual electric signal that alternates between the excitation component and the ablation component more frequently than once every two seconds claim 1 , and wherein applying the dual electric signal during the dual-signal period comprises applying claim 1 , during the dual-signal period claim 1 , the dual electric signal that alternates between the excitation component and the ablation component more frequently than once every two seconds.3. The method according to claim 1 , wherein the dual electric signal is a complex signal that contains the excitation component and the ablation component claim 1 , and wherein applying the dual electric signal during the dual-signal period comprises applying claim 1 , during the dual-signal period claim 1 , the complex signal that contains the excitation component and the ablation component.47-. (canceled)8. The method according to claim 1 , further comprising detecting a change in a value of a parameter of a subject ...

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Номер записи: 86
02-03-2017 дата публикации

RANDOM PULSED HIGH FREQUENCY THERAPY

Номер: US20170056093A1
Автор: Cosman Eric Richard
Принадлежит:

A method and apparatus for modifying a function of tissue can include the application of an electromagnetic signal output to tissue cells. The electromagnetic signal output can have a waveform with bursts of signal output amplitude that produces fields in the tissue during the burst on-time that can modify cell components. The on-time periods are followed by off-time periods of low signal output amplitude which produce lesser modification effects on cell components. The on-time periods have time durations that are non-predetermined and random. The rate of on-time bursts can be regular, and in one example periodic. In one example, the waveform has amplitudes during the on-time periods and durations of on-time periods that causes elevation of the temperature of tissue that exceeds the lethal temperature levels of 45 to 50° C. 1. An apparatus for altering a function of living tissue comprising:an electrode; anda signal generator coupled to the electrode to generate a signal output to be applied to the living tissue through the electrode, the signal output having an interrupted waveform having bursts of on-time periods of a high frequency wave signal, the on-time periods having non-predetermined time durations, each of the on-time periods being followed by off-time periods of low signal output relative to the intensity of the preceding on-time period, and the bursts of the on-time periods commencing at a regular rate, such that the application of the signal output to the living tissue for a sufficient treatment time will result in alteration of a function of the living tissue.2. The apparatus of claim 1 , wherein the waveform results in an average temperature in the living tissue that is below the lethal temperature range of about 45 to 50° C.3. The apparatus of claim 1 , wherein the waveform results in an average temperature in the living tissue that is above the lethal temperature range of about 45 to 50° C.4. The apparatus of claim 2 , wherein the waveform of the ...

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Номер записи: 87
02-03-2017 дата публикации

BATTERY POWERED SURGICAL INSTRUMENT

Номер: US20170056097A1
Автор: Evans John Hefin Bowen, Green Alan E., Leather Gordon J., Lee Robin M., Monson Gavin M., Pinheiro Paulo Alexandre da Torre, Roberts Paul C., Ruddenklau David I., Snowdon David A., Stocks David J., Styler Clive, Trees Gregory A.
Принадлежит:

A medical instrument is disclosed. The medical instrument includes at least one electrical contact element, a battery, a radio frequency (RF) generation circuit coupled to and operated by the battery and operable to generate an RF drive signal and to provide the RF drive signal to the at least one electrical contact, and a battery discharge circuit coupled to the battery. A processor is coupled to the battery discharge circuit and a memory is coupled to the processor. The memory stores machine executable instructions that when executed cause the processor to monitor activation of the RF generation circuit and disable the RF generation circuit when the RF drive signal is fired a predetermined number of times. The medical instrument may include an activation switch and/or a disposal switch supported by the housing. 1. A battery powered surgical instrument , comprising: a first rotatable electrode;', 'a second rotatable electrode;', 'a first electrical contact element; and', 'a second electrical contact element, wherein the first and second rotatable electrodes are electrically coupled to the corresponding first and second electrical contact elements;, 'a rotatable electrically conductive shaft, comprisinga battery;a radio frequency (RF) generation circuit coupled to the battery and to the first and second electrical contact elements, wherein the RF generation circuit is configured to generate an RF drive signal and wherein the RF generation circuit is configured to provide the RF drive signal to the first and second electrical contact elements;a battery discharge circuit coupled to the battery, wherein the discharge circuit comprises an electrical switch configured to receive a battery discharge signal and is further configured to controllably discharge the battery to prevent reuse of the battery;a processor coupled to the battery discharge circuit; monitor activation of the RF generation circuit; and', 'disable the RF generation circuit when the RF generation circuit ...

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Номер записи: 88
20-02-2020 дата публикации

SYSTEMS AND METHODS FOR ACTIVATING TRANSDUCERS

Номер: US20200054283A1
Автор: Bisalputra Danai, Louie Roxanne Wai Tak, Reinders Daniel Martin, Weinkam Daniel Robert
Принадлежит:

Transducer-based systems and methods may be configured to display a graphical representation of a transducer-based device, the graphical representation including graphical elements corresponding to transducers of the transducer-based device, and also including between graphical elements respectively associated with a set of the transducers and respectively associated with a region of space between the transducers of the transducer-based device. Selection of graphical elements and/or between graphical elements can cause activation of the set of transducers associated with the selected elements. Transducer activation characteristics, such as initiation time, activation duration, activation sequence, and energy delivery characteristics, can vary based on numerous factors. Visual characteristics of graphical elements and between graphical elements can change based on an activation-status of the corresponding transducers. Activation requests for a set of transducers can be denied if it is determined that a transducer in the set of transducers is unacceptable for activation. 1. (canceled)2. A medical device system comprising:a data processing device system;an input-output device system communicatively connected to the data processing device system, the input-output device system comprising a catheter device, an energy source device system, and a sensing device system, the catheter device comprising a structure and a plurality of transducers located on the structure, the plurality of transducers arranged in a distribution, and the plurality of transducers positionable in a bodily cavity; anda memory device system communicatively connected to the data processing device system and storing a program executable by the data processing device system, the memory device system further storing target temperature information associated with respective target temperatures for different transducers of the plurality of transducers having different locations in the distribution, the ...

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Номер записи: 89
20-02-2020 дата публикации

CONTROLLING IMPEDANCE RISE IN ELECTROSURGICAL MEDICAL DEVICES

Номер: US20200054382A1
Автор: Davison Mark A., Messerly Jeffrey D., Yates David C.
Принадлежит:

Various embodiments are directed to electrosurgical systems for providing an electrosurgical signal to a patient. A control circuit may, for a first application period, apply the electrosurgical signal to first and second electrodes according to a first mode. In the first mode, the control circuit may limit the electrosurgical signal to a first maximum power when the impedance between the first and second electrodes exceeds a first mode threshold. The control circuit may also, for a second application period after the first application period, apply the electrosurgical signal according to a second mode. In the second mode, the control circuit may limit the electrosurgical signal to a second mode maximum power when the impedance between the first and second electrodes exceeds a second mode threshold. The second maximum power may be greater than the first maximum power. 120-. (canceled)21. An electrosurgical system , comprising: a first jaw comprising a first electrode; and', 'a second jaw comprising a second electrode, wherein the second jaw is movable relative to the first jaw between an open configuration and a closed configuration; and, 'an end effector, comprising receive an input indicating a repeat mode;', 'apply a first tissue bite algorithm to the first electrode and the second electrode based on an occurrence of a first tissue bite;', 'enter a hold state at a termination of the first tissue bite algorithm; and', 'determine an occurrence of a second tissue bite., 'a control circuit, configured to22. The electrosurgical system of claim 21 , wherein the control circuit is configured to determine the occurrence of the second tissue bite by determining a reduction in impedance between the first electrode and the second electrode.23. The electrosurgical system of claim 21 , wherein the control circuit is configured to determine the occurrence of the second tissue bite by monitoring movement of a jaw closure trigger to an open position and then to a closed position ...

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Номер записи: 90
15-05-2014 дата публикации

ELECTROSURGICAL SYSTEM WITH SELECTIVE CONTROL OF ACTIVE AND RETURN ELECTRODES

Номер: US20140135760A1
Автор: Cadouri Hadar, Tetzlaff Philip M.
Принадлежит: ARTHROCARE CORPORATION

Electrosurgical system with selective control of active and return electrodes. At least some of the illustrative embodiments are systems comprising an electrosurgical wand and an electrosurgical controller. The wand comprises a non-conductive outer surface, at least three electrodes disposed on a distal end of the wand, and at least three electrical leads extending from a proximal end of the wand (one electrical lead electrically coupled to each electrode). The controller comprises a voltage generator and a control circuit coupled between the voltage generator and the electrodes of the wand. The control circuit is configured to: selectively electrically couple the active terminal singly and in combination to the electrodes of the wand; and selectively electrically couple the return terminal singly and in combination to electrodes of the wand. 1. A system comprising:a wand comprising a non-conductive outer surface, at least three electrodes disposed on a distal end of the wand, and at least three electrical leads extending from a proximal end of the wand, one of the at least three electrical leads electrically coupled singly to each of the at least three electrodes; and a controller connector coupled to the at least three electrical leads;', 'a voltage generator configured to generate voltage of varying amplitude, the voltage generator has an active terminal and a return terminal; and', 'a control circuit coupled between the controller connector and the voltage generator;, 'a controller comprisingthe control circuit configured to selectively electrically couple both the active terminal and the return terminal to the at least three electrical leads, such that any of the at least three electrodes are electrically coupled singly or in combination to the voltage generator as an active electrode or as a return electrode.2. The system of wherein the controller further comprises an operator interface device claim 1 , and wherein the control circuit is configured to ...

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Номер записи: 91
17-03-2022 дата публикации

SYSTEM AND METHOD FOR INDICATING RETURN ELECTRODE CONTACT

Номер: US20220079653A1
Автор: Gearheart John R., Hubelbank David
Принадлежит:

An electrosurgical system monitors and visually indicates a degree of contact between a return electrode and a patient's skin. The system includes an electrosurgical generator and a return pad. The return pad includes a return electrode, a lighting element, and a cable electrically and mechanically coupling the return electrode to the generator. The lighting element is configured to emit light based on the degree of contact between the return electrode and the patient. 120-. (canceled)21. A patient return pad , comprising:a return electrode configured to be coupled to a patient and to receive electrosurgical energy from an active electrode;a return lead having a first end portion coupled to the return electrode and a second end portion configured to electrically couple the return electrode to an electrosurgical energy source; anda translucent sheathing disposed over at least a portion of the return lead.22. The patient return pad according to claim 21 , further comprising a lighting element disposed at least partially within the translucent sheathing.23. The patient return pad according to claim 22 , wherein the lighting element is configured to illuminate and emit light through the translucent sheathing based on a measured impedance.24. The patient return pad according to claim 23 , wherein illumination of the lighting element is configured to indicate a degree of contact between the return electrode and the patient.25. The patient return pad according to claim 23 , wherein light emitted by the lighting element is configured to be varied based on the measured impedance of the return electrode.26. The patient return pad according to claim 22 , wherein the lighting element includes a plurality of lighting elements disposed along a length of the return lead.27. The patient return pad according to claim 22 , wherein the lighting element is located at the first end portion of the return lead adjacent the return electrode.28. The patient return pad according to claim 22 ...

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Номер записи: 92
17-03-2022 дата публикации

APPARATUS FOR DETERMINING A POSITION OF A TEMPERATURE PROBE DURING A PLANNING FOR AN ABLATION PROCEDURE

Номер: US20220079677A1
Автор: HAUTVAST GUILLAUME LEOPOLD THEODORUS FREDERIK
Принадлежит:

The invention refers to an apparatus allowing to determine a planned position of a temperature probe during a planning for an ablation procedure. The apparatus comprises an ablation plan providing unit () for providing an ablation plan, wherein the ablation plan comprises geometric information of an ablation region and of a protection region. The protection region should be protected from ablation. The geometric information comprises information on a position and shape of a respective region. A temperature probe position determination unit () is adapted to determine a planned position of the temperature probe, wherein the planned position of the temperature probe is determined based on the geometric information of the ablation region and of the protection region. The apparatus allows to increase the protection of regions that should be protected, like a specific organ, such that the security of an ablation procedure for a patient can also be increased. 1. An apparatus for determining a position of a temperature probe during a planning for an ablation procedure , wherein the apparatus comprises:an ablation plan providing unit configured to provide an ablation plan, wherein the ablation plan comprises geometric information of an ablation region and of a protection region, wherein the protection region should be protected from ablation during the ablation procedure, wherein the geometric information comprises information on a position and shape of a respective region,a temperature probe position determination unit configured to determine a planned position of the temperature probe in which the temperature probe should be positioned to protect the protection region during the ablation procedure, wherein the planned position of the temperature probe is determined based on the geometric information of the ablation region and of the protection region, andwherein the temperature probe position determination unit is configured to determine a shortest path between the ...

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Номер записи: 93
17-03-2022 дата публикации

Signal generators for use with tissue modification systems

Номер: US20220080191A1
Автор: Paul B. Friedrichs, Timothy J. Gundert
Принадлежит: Galary Inc

Embodiments described herein relate to signal generators, systems including signal generators, and related methods. A signal generator includes capacitor(s) to store energy used to generate a treatment signal. The signal generator also includes a waveform shaping circuit, a controller, a voltage sense circuit, and a current sense circuit. The waveform shaping circuit is coupled to the capacitor(s) and includes first, second, third, and fourth switches, each of which is configured to be selectively turned ON and OFF, to allow current to pass through the switch when turned ON, and to prevent current from passing through the switch when turned OFF. The controller selectively controls the switches in order to generate the treatment signal. The controller also selectively controls the switches in order to perform certain fault tests, which rely on voltages sensed by the voltage sense circuit and currents sensed by the current sense circuit.

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Номер записи: 94
17-03-2022 дата публикации

Methods and apparatus for modifying or killing cells by manipulating the cell membrane charging time

Номер: US20220080192A1
Автор: Christopher FESMIRE, Michael Benjamin Sano, Ross A. PETRELLA
Принадлежит: North Carolina State University

A method of treatment includes modifying and/or killing cells by changing the cell membrane charging time to make the cells more susceptible to the influence of electric fields. The method may further include inserting one or more electrodes into tissue, acquiring a temperature of the tissue, delivering electrical energy to the tissue by electrical pulses, determining a rate of energy delivery of the electrical energy such that the temperature rises above a first critical temperature but remains below a second critical temperature, and delivering the electrical energy until a specific dose is achieved.

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Номер записи: 95
10-03-2016 дата публикации

ARRANGEMENT FOR CONTACT COAGULATION OF BIOLOGICAL TISSUE

Номер: US20160066978A1
Автор: Kegreiss Marc, Keller Sandra
Принадлежит: ERBE ELEKTROMEDIZIN GMBH

An arrangement having a device for providing high-frequency voltage Ufor contact coagulation of the biological tissue. The device is equipped to operate with a high voltage that is normally not suitable for contact coagulation, but otherwise used for spark coagulation, for example, more than 400V at the beginning of the contact coagulation. During the operation of the generator the tissue impedance is monitored. This can occur by means of continuously measuring the voltage Uof the flowing current Iand the phasing φ between the voltage and the flowing current. Using both, the measuring unit continuously determines the tissue impedance . A minimum detector is provided to determine if an impedance minimum has passed through and if such is found, to induce the generator control to reduce the voltage Udelivered by the device to a value that avoids spark generation as well as desiccation of the tissue. 1. An arrangement for contact coagulation of biological tissue , the arrangement comprising:a generator configured to provide high-frequency voltage and deliver high-frequency current;a generator control, by means of which the high-frequency voltage provided by the generator can be influenced;an instrument having at least one electrode and being supplied with high-frequency current by the generator;a measuring unit configured to monitor the tissue impedance; anda minimum detector configured to detect a minimum of the tissue impedance, the minimum detector being connected with the generator control in order to induce the generator, upon detecting a minimum of the tissue impedance, to thereupon provide a reduced high-frequency voltage.2. The arrangement of claim 1 , wherein the generator control has a stored adjustment value for the voltage that is to be applied claim 1 , and that the generator control is equipped to induce the generator at the beginning of a coagulation process to provide the voltage that is to be applied at a value that is higher than the adjustment value.3 ...

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Номер записи: 96
08-03-2018 дата публикации

SYSTEM AND METHOD FOR SELECTIVELY ENERGIZING CATHETER ELECTRODES

Номер: US20180064489A1
Автор: Jimenez Eduardo
Принадлежит:

The present invention is directed to a system, a method and a catheter that provide improved ablation capabilities and improved energy efficiency by selectively energizing catheter electrodes on the basis of impedance measurements. In particular, the invention is directed to the selective energization of catheter radial electrodes that together with a tip electrode form a generally continuous tissue contact surface, wherein the selection is made on the basis of impedance measurement as an indication of the amount of tissue contact of each radial electrode. 1. A catheter comprising:an elongated catheter body; anda tip section having an irrigated tip electrode and a plurality of radial electrodes proximal of and immediately adjacent to the irrigated tip electrode such that each of the radial electrodes forms a different continuous elongated electrode surface with the tip electrode.2. The catheter of claim 1 , wherein the radial electrodes span side-by-side radially around the tip section claim 1 , each separated from adjacent radial electrodes by a gap.3. The catheter of claim 2 , wherein the gap includes a non-conducting material.4. The catheter of claim 1 , wherein the plurality of radial electrodes is about four.5. The catheter of claim 1 , wherein the radial electrodes are generally equi-sized.6. The catheter of claim 1 , wherein the radial electrodes are generally equi-angular about the tip section.7. The catheter of claim 1 , wherein the radial electrodes jointly span about 360 degrees around the tip section.8. The catheter of claim 1 , wherein each of the radial electrodes spans about 90 degrees around the tip section.9. The catheter of claim 1 , wherein each of the radial electrodes has a generally rectangular shape.10. The catheter of claim 1 , further comprising a different lead wire for each of the radial electrodes.11. The catheter of claim 1 , wherein the radial electrodes have an elongated form extending longitudinally along the tip section.12. The ...

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Номер записи: 97
29-05-2014 дата публикации

Radio Frequency Procedure Protection

Номер: US20140148802A1
Автор: LeMay Charles
Принадлежит:

A method and apparatus is provided for protecting a patient during a radio frequency medical procedure. A detector includes an input receiving electrical impulses representing at least one patient parameter to be monitored from at least one shielded sensor connected to the patient. The detector detects at least one of (a) a voltage associated with parasitic current generated during a radio frequency medical procedure and (b) a current generated during a radio frequency medical procedure. A control circuit is coupled to the detector and compares at least one of (a) the detected voltage with a threshold voltage value and (b) the detected current with a threshold current value. A switch is coupled between the detector and the control circuit. In response to a control signal generated by the control circuit, the switch selectively switches between a conductive state and a non conductive state. The conductive state maintains a low impedance at the at least one shielded sensor and maintains the shield of the at least one shielded sensor in an effective state when at least one of (a) the detected voltage is below the threshold voltage value and (b) the detected current is below the threshold current value. The non-conductive state provides a high impedance at the at least one shielded sensor and causes the shield of the at least one shielded sensor to become ineffective when at least one of (a) the detected voltage is equal to or greater than the threshold voltage value and (b) the detected current is equal to or greater than the threshold current. 1. An apparatus for protecting a patient during a radio frequency medical procedure comprising:a detector having an input receiving electrical impulses representing at least one patient parameter to be monitored from at least one shielded sensor connected to the patient, said detector detects at least one of (a) a voltage associated with parasitic current generated during the radio frequency medical procedure and (b) a current ...

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Номер записи: 98
17-03-2016 дата публикации

SYSTEMS AND METHODS FOR ACTIVATING TRANSDUCERS

Номер: US20160073918A1
Автор: Bisalputra Danai, Louie Roxanne Wai Tak, Reinders Daniel Martin, Weinkam Daniel Robert
Принадлежит:

Transducer-based systems and methods may be configured to display a graphical representation of a transducer-based device, the graphical representation including graphical elements corresponding to transducers of the transducer-based device, and also including between graphical elements respectively associated with a set of the transducers and respectively associated with a region of space between the transducers of the transducer-based device. Selection of graphical elements and/or between graphical elements can cause activation of the set of transducers associated with the selected elements. Transducer activation characteristics, such as initiation time, activation duration, activation sequence, and energy delivery characteristics, can vary based on numerous factors. Visual characteristics of graphical elements and between graphical elements can change based on an activation-status of the corresponding transducers. Activation requests for a set of transducers can be denied if it is determined that a transducer in the set of transducers is unacceptable for activation. 1selecting, via an input-output device system communicatively connected to a data processing device system and a transducer-based device, at least some of a plurality of transducers of the transducer-based device, the plurality of transducers arranged in a distribution, the distribution positionable in a bodily cavity, the at least some of the plurality of transducers defining a plurality of transducer sets including at least a first transducer set, a second transducer set, and a third transducer set; andactivating, via the input-output device system, the plurality of transducer sets according to a sequence, at least a portion of the activating according to the sequence including an initiation of an activation of each transducer in the first transducer set after each transducer in at least the second transducer set and the third transducer set has been activated, each of at least one of the first ...

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Номер записи: 99
17-03-2016 дата публикации

TREATMENT SYSTEM

Номер: US20160074093A1
Автор: Hayashida Tsuyoshi, HONDA Yoshitaka, KABAYA Akinori, Konishi Sumihito, SHIMIZU Ko
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A treatment system comprises a first power supply apparatus and a second power supply apparatus each connectable with a surgical device and a neutral electrode, the first power supply apparatus being electrically connected with the second power supply apparatus, the treatment system treating a living tissue while performing transmission and reception of information between the first and second power supply apparatuses, wherein, in a case where the neutral electrode is connected to only one of the first and second power supply apparatuses, an output of the surgical device connected to the second power supply apparatus is inhibited during an output of the surgical device connected to the first power supply apparatus, and the output of the surgical device connected to the first power supply apparatus is inhibited during the output of the surgical device connected to the second power supply apparatus. 1. A treatment system comprising: a first power supply apparatus configured to be connectable with a first electric surgical device and a first neutral electrode; and a second power supply apparatus configured to be connectable with a second electric surgical device and a second neutral electrode , in which the first power supply apparatus and the second power supply apparatus are electrically connected with each other through a connector section and a living tissue is treated while transmission and reception of information is performed between the first power supply apparatus and the second power supply apparatus through a communication section ,wherein the first power supply apparatus comprises:a first high-frequency power supply section that supplies high-frequency current to the first electric surgical device based on a first operation instruction signal;a first detecting section that detects whether the first neutral electrode is connected or not; anda first control section that controls the first power supply apparatus,wherein the second power supply apparatus ...

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Номер записи: 100