ABLATIONSELEKTRODE MIT ISOLIERTEM TEMPERATURMESSELEMENT

MODIFICATION OF THE AIRWAYS BY USE OF ENERGY

MODIFICATION OF THE AIRWAYS BY USE OF ENERGY

ABLATION SYSTEM WITH A SPLIT POINT EXHIBITING CATHETER AND WITH SCOLDING AND MEASURING POSSIBILITIES

Cryoablation system with magnetic resonance imaging detection

A magnetic resonance imaging (MRI) guided surgical system is provided that includes one or more surgical tools having components configured to develop reactive effects when exposed to MR signals generated by the MRI system. The system includes a control system that can determine whether the MR system is generating MR signals, and if the control system determines that the MR system is generating MR signals, mitigates the reactive effects of MR signals on components of the surgical tools. The system can include a cryoablation system with a cryoprobe having a probe shaft being made of a metallic material. If the control system determines that the MR system is generating MR signals, the control system can electrically disconnect the cryoprobe and/or ignore electrical signals generated by the electric heater in response to exposure to MR signals, and/or initiate a cooling operation of the probe shaft, whereby the cooling operation.

Modification of airways by application of energy

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

TEMPERATURE MEASUREMENT IN CATHETER

Ablation of cardiac tissue is carried out by inserting a probe having an ablation electrode and a plurality of microelectrodes into a body of a living subject to establish contact between two of the microelectrodes and target tissue, and energizing the ablation electrode. While the ablation electrode is energized impedances are measured between the microelectrodes, and the power level of the ablation electrode adjusted according to the impedances. 38 3 40 40 40 42 46 46 42 ...

Microwave energy-delivery device and system

H-I L-00077A (1 988-77A) MICROWAVE ENERGY-DELIVERY DEVICE AND SYSTEM Abstract An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide (1032) and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device (20) for applying energy to the point of interest.

Systems and methods for estimating tissue parameters using surgical devices

Systems and methods for estimating tissue parameters, including mass of tissue to be treated and a thermal resistance scale factor between the tissue and an electrode of an energy delivery device, are disclosed. The method includes sensing tissue temperatures, estimating a mass of the tissue and a thermal resistance scale factor between the tissue and an electrode, and controlling an electrosurgical generator (102) based on the estimated mass and the estimated thermal resistance scale factor. The method may be performed iteratively and non-iteratively. The iterative method may employ a gradient descent algorithm that iteratively adds a derivative step to the estimates of the mass and thermal resistance scale factor until a condition is met. The non-iterative method includes selecting maximum and minimum temperature differences and estimating the mass and the thermal resistance scale factor based on a predetermined reduction point from the maximum temperature difference to the minimum temperature ...

Modification of airways by application of energy

ELECTROSURGICAL APPARATUS FOR DELIVERING RADIOFREQUENCY ENERGY AND MICROWAVE ENERGY AND A METHOD FOR ITS USE

An electrosurgical waveform (500) is to be provided having both radiofrequency (RF) energy and microwave energy components arranged to perform efficient haemostasis in biological tissue. The waveform comprises a first portion (506) primarily of RF electromagnetic energy and a second portion (508) primarily of microwave electromagnetic energy that follows the first portion. The second portion further comprises a plurality of RF pulses (510), wherein the first portion is to transition to the second portion when either a duration (512) of the first portion meets or exceeds a predetermined duration threshold or an impedance determined during the first portion meets or exceeds a predetermined threshold.

TEMPERATURE MEASUREMENT IN CATHETER

Ablation of cardiac tissue is carried out by inserting a probe having an ablation electrode and a plurality of microelectrodes into a body of a living subject to establish contact between two of the microelectrodes and target tissue, and energizing the ablation electrode. While the ablation electrode is energized impedances are measured between the microelectrodes, and the power level of the ablation electrode adjusted according to the impedances.

TISSUE HEATING AND ABLATION SYSTEM

Systems and methods employ an energy emitting electrode (34) to heat tissue. The systems and methods derive a temperature prediction for a future time period. The systems and methods control the application of energy to the energy emitting electrode (34) based, at least in part, upon the temperature prediction.

SYSTEMS AND METHODS FOR ABLATING BODY TISSUE USING PREDICTED MAXIMUM TISSUE TEMPERATURE

This invention is systems and methods that ablate body tissue using an electrode (16) for contacting tissue at a tissue electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element (50) to remove heat from the electrode (16) at a determinable rate. The systems and methods employ a processing element (98) to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue electrode interface. The processing element (98) controls the power level of ablation energy transmitted by the electrode (16), or the rate at which the electrode (16) is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.

Methods for treating airways

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

Cryosurgical instrument and related techniques

A cryosurgical instrument includes a cryoprobe operative to form an ice ball in tissue of a patient targeted for cryosurgery upon activation, a sheath disposed over the cryoprobe and at least one measuring device supported by the sheath for measuring a parameter of the tissue of the patient. The instrument includes a processor for predicting formation of the ice ball by the cryoprobe over time and a display for displaying the prediction of ice ball formation. The processor is responsive to an output signal provided by the measuring device and a model of the effective thermal conductivity of the tissue of the patient targeted for surgery. In one embodiment, the measuring device is embedded in the sheath and measures temperature, thermal conductivity, blood perfusion rate and/or thermal diffusivity. The processor may be further responsive to an impedance measurement circuit for verifying the prediction.

Surgical generator

THERMAL SURGICAL TOOL

An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

DEVICE AND METHOD FOR NON-INVASIVE TREATEMNT OF SKIN USING LASER LIGHT

The invention relates generally to the treatment of skin using laser light, and more particularly to a non-invasive device and method for such treatment. During skin treatments, heating of the epidermis is undesired because it may cause discomfort for the person being treated, adverse skin reactions and unwanted changes in skin pigment. The invention provides a laser treatment beam having a first 22a and a second 22b beam region of non-zero light intensity disposed at a periphery of a transverse cross-section of the beam, and a third beam region 22c, arranged between the first 22a and the second 22b beam region, of lower light intensity than said non-zero light intensity. The treatment beam 22 exits the device 10 along its optical treatment axis 13. As the treatment beam 22 passes through an outer layer of the skin to the focal spot 25 along the optical treatment axis (13), the extent of the third beam region 22c is predetermined and/or controlled so as to provide a corresponding third ...

Control system and process for application of energy to airway walls and other mediums

The present invention includes a system for delivering energy to an airway wall of a lung comprising an energy delivering apparatus and a PID controller having one or more variable gain factors which are rest after energy deliver has begun. The energy delivering apparatus may include a flexible elongated member and a distal expandable basket having at least one electrode for transferring energy to the airway wall and at least one temperature sensor for measuring temperature. The PID controller determines a new power set point base on an error between a preset temperature and the measured temperature. The algorithm can be Pi+1 = Pi + G(aei+ ßei-1+ ? ei-2) where a, ß and ? are preset values and a is from 1 to 2; ß is from -1 to -2; and ? is from -0.5 to 0-5. In another variation, the controller is configured to shut down if various measured parameters are exceeded such as, for example, energy, impedance, temperature, temperature differences, activation time and combinations thereof. Methods ...

ВЫЧИСЛЕНИЕ КАРТЫ ПЛОТНОСТИ ЭНЕРГИИ С ИСПОЛЬЗОВАНИЕМ ТЕРМОАКУСТИЧЕСКОГО РЕЖИМА

FIELD: medicine. SUBSTANCE: group of inventions relates to medicine, specifically a heating system for heating the target zone using a treatment plan and calculating an energy density map using a thermoacoustic model. Medical apparatus comprises a computer-readable medium, comprising a computer program for performing a method for heating a target zone using a treatment plan and energy density data. Medium contains machine-executable instructions for execution by the processor, controlling the medical apparatus. Medical apparatus comprises: a heating system for heating a target area of a patient, wherein execution of instructions prompts the processor to receive a treatment plan. Execution of instructions further prompts the processor to repeatedly: heat the target area during alternating heating periods and cooling periods by controlling the heating system using the treatment plan. Calculate the current energy density map in a preset volume using a treatment plan and a thermoacoustic model. Furthermore, the current energy density is repeatedly updated during the heating of the target zone. Calculate the cumulative energy density map by summing the repeatedly calculated current energy density maps, taking into account the estimation of the cooling rate of the tissue. Display the cumulative energy density map on a display. Modify the treatment plan in accordance with the cumulative energy density map taking into account the next heating instance. EFFECT: group of inventions allows to limit the maximum cumulative energy density in the target zone. 12 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК A61B 18/18 A61N 7/02 A61B 18/20 A61N 5/00 (11) (13) 2 654 616 C2 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК A61B 18/18 (2006.01); A61B 18/20 (2006.01); A61B 34/10 (2006.01); A61B 90/36 (2006.01); A61N 7/02 (2006.01) (21)(22) Заявка: 2014144313, 22.03.2013 22.03.2013 Дата регистрации ...

SYSTEM FOR THE CONTROL OF FABRIC ABLATION WITH TEMPERATURE SENSORS

Modification of airways by application of energy

TEMPERATURE SENSING APPARATUS FOR USE WITH A PHOTO-THERMAL TARGETED TREATMENT SYSTEM AND ASSOCIATED METHODS

A temperature measurement system for measuring a temperature of a measured surface includes: 1) a first temperature sensor; and 2) a reference surface including a second temperature sensor integrated therein. The first temperature sensor includes a field of view simultaneously covering both at least a portion of the measured surface and at least a portion of the reference surface, thus is configured for simultaneously taking a first measurement of both the portion of the measured surface and the portion of the reference surface. The first measurement of the reference surface taken by the first temperature sensor is compared to a second measurement taken by the second temperature sensor for use in calibrating the first temperature sensor.

SURGICAL GENERATOR FOR ULTRASONIC AND ELECTROSURGICAL DEVICES

A surgical generator (102) that may produce a drive signal or signals of particular voltages, currents, and frequencies, e.g. 55,500 cycles per second (Hz). The drive signal or signals may be provided to an ultrasonic surgical device (104), and specifically to a transducer. In one embodiment, the generator may be configured to produce a drive signal of a particular voltage, current, and/or frequency that can be stepped with high resolution, accuracy, and repeatability. Additionally, the surgical generator may generate a drive signal or signals with output power sufficient to perform bipolar electrosurgery using radio frequency (RF) energy. The drive signal may be provided, for example, to electrodes of the electrosurgical device (106). Accordingly, the generator may be configured for therapeutic purposes by applying electrical signals to an ultrasonic transducer or electrical energy to the tissue sufficient for treating the tissue (e.g., cutting, coagulation, cauterization, tissue welding ...

SYSTEMS AND METHODS FOR ESTIMATING TISSUE PARAMETERS USING SURGICAL DEVICES

Systems and methods for estimating tissue parameters, including mass of tissue to be treated and a thermal resistance scale factor between the tissue and an electrode of an energy delivery device, are disclosed. The method includes sensing tissue temperatures, estimating a mass of the tissue and a thermal resistance scale factor between the tissue and an electrode, and controlling an electrosurgical generator based on the estimated mass and the estimated thermal resistance scale factor. The method may be performed iteratively and non-iteratively. The iterative method may employ a gradient descent algorithm that iteratively adds a derivative step to the estimates of the mass and thermal resistance scale factor until a condition is met. The non-iterative method includes selecting maximum and minimum temperature differences and estimating the mass and the thermal resistance scale factor based on a predetermined reduction point from the maximum temperature difference to the minimum temperature ...

APPARATUS AND METHOD FOR VENOUS LIGATION

A minimally-invasive surgery apparatus (10) for causing the lumen of a vein to collapse to prevent blood flow through the vein, e.g., a varicose vein or a side branch of the saphenous vein, includes an electrode (20) which is electrically connected to a power source (14), and the electrode (20) is percutaneously advanced into the vein. Then, the power source (14) is activated to energize the electrode (20) and thus the blood vein until the blood vein sufficiently collapses to block the lumen of the vein. A feedback loop including a microprocessor (44) is also provided for sensing electrical impedance of the tissue within the vein being energized and for deenergizing the electrode (20) when the impedance reaches a predetermined value. The apparatus (10) can also be used to block a fallopian tube.

SYSTEMS AND METHODS FOR ABLATING BODY TISSUE USING PREDICTED MAXIMUM TISSUE TEMPERATURE

This invention is systems and methods that ablate body tissue using an electrode (16) for contacting tissue at a tissue electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element (50) to remove heat from the electrode (16) at a determinable rate. The systems and methods employ a processing element (98) to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue electrode interface. The processing element (98) controls the power level of ablation energy transmitted by the electrode (16), or the rate at which the electrode (16) is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.

METHODS OF REDUCING MUCUS IN AIRWAYS

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

Surgical generator for ultrasonic and electrosurgical devices

In accordance with various embodiments, methods for controlling electrical power provided to tissue via a surgical device may comprise providing a drive signal. A power of the drive signal may be proportional to a power provided to the tissue via the surgical device. The methods may also comprise periodically receiving indications of an impedance of the tissue and applying a first composite power curve to the tissue, wherein applying the first composite power curve to the tissue comprises. Applying the first composite power curve to the tissue may comprise modulating a first predetermined number of first composite power curve pulses on the drive signal; and for each of the first composite power curve pulses, determining a pulse power and a pulse width according to a first function of the impedance of the tissue The methods may also comprise applying a second composite power curve to the tissue. Applying the second composite power curve to the tissue may comprise modulating at least one second composite power curve pulse on the drive signal; and for each of the at least one second composite power curve pulses, determining a pulse power and a pulse width according to a second function of the impedance of the tissue.

Systems and methods for controlling tissue ablation using multiple temperature sensing elements

Systems and associated methods place a temperature sensing element in an "edge regions" between an energy transmitting electrode and a non-electrically conducting support body, where higher temperatures are likely to exist. Reliable temperature sensing, which is sensitive to variations in temperatures along the electrode, results.

Real-time 3D microwave monitoring of thermal therapy

A method for determining a change of temperature of an object. The method may include heating an object and measuring scattering parameters (S-parameters) of scattered microwave electric fields from the object. A distorted Born iterative method may be used to determine a change of a dielectric property of the object based on the measured S-parameters. A change of temperature of the object may be determined based on the change of the dielectric property of the object.

УСТРОЙСТВО И СПОСОБ ДЛЯ НЕИНВАЗИВНОГО ЛЕЧЕНИЯ КОЖИ С ИСПОЛЬЗОВАНИЕМ ЛАЗЕРНОГО СВЕТА

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2016 133 959 A (51) МПК A61B 18/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016133959, 04.01.2015 (71) Заявитель(и): КОНИНКЛЕЙКЕ ФИЛИПС Н.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: 21.01.2014 EP 14151850.6 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 22.08.2016 (86) Заявка PCT: (87) Публикация заявки PCT: WO 2015/110273 (30.07.2015) A Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Неинвазивное устройство (10) для лечения внутреннего слоя (17) кожи с использованием лазерного света, содержащее: - источник (20) света и связанную оптическую систему (12) для генерации импульсов лазерного лечебного пучка (22) вдоль оптической оси (13) лечения устройства (10), причем источник (20) света и оптическая система (12) сконструированы и выполнены так, чтобы обеспечивать в пределах поперечного сечения лазерного лечебного пучка (22): - первую (22a, 122a) и вторую (22b, 122b) области пучка с ненулевой интенсивностью светового излучения, расположенные на периферии поперечного сечения, и - третью область (22c, 122c) пучка, расположенную между первой (22a, 122a) и второй (22b, 122b) областями пучка, с более низкой интенсивностью светового излучения, чем упомянутая ненулевая интенсивность светового излучения; причем оптическая система (12) дополнительно сконструирована и выполнена так, чтобы: - при использовании фокусировать лечебный лазерный пучок (22) в фокальное пятно (25) во внутреннем слое (17) кожи, расположенном на оптической оси (13) лечения; - при использовании направлять первую (22a, 122a) и вторую (22b, 122b) области пучка вдоль оптической оси (13) лечения через наружный слой (16) кожи в фокальное Стр.: 1 A 2 0 1 6 1 3 3 9 5 9 (54) УСТРОЙСТВО И СПОСОБ ДЛЯ НЕИНВАЗИВНОГО ЛЕЧЕНИЯ КОЖИ С ИСПОЛЬЗОВАНИЕМ ЛАЗЕРНОГО СВЕТА 2 0 1 6 1 3 3 9 5 9 EP 2015/ ...

CONTROL SYSTEM AND - PROCEDURES FOR THE ENERGY INPUT FOR AIRWAY WALLS OR OTHER MEDIA

ABLATION ELECTRODE WITH INSULATING TEMPERATURE MEASURING ELEMENT

Cryoablation system with magnetic resonance imaging detection

A magnetic resonance imaging (MRI) guided surgical system is provided that includes one or more surgical tools having components configured to develop reactive effects when exposed to MR signals generated by the MRI system. The system includes a control system that can determine whether the MR system is generating MR signals, and if the control system determines that the MR system is generating MR signals, mitigates the reactive effects of MR signals on components of the surgical tools. The system can include a cryoablation system with a cryoprobe having a probe shaft being made of a metallic material. If the control system determines that the MR system is generating MR signals, the control system can electrically disconnect the cryoprobe and/or ignore electrical signals generated by the electric heater in response to exposure to MR signals, and/or initiate a cooling operation of the probe shaft, whereby the cooling operation.

Electrosurgical apparatus for delivering radiofrequency energy and microwave energy and a method for its use

An electrosurgical waveform (500) is to be provided having both radiofrequency (RF) energy and microwave energy components arranged to perform efficient haemostasis in biological tissue. The waveform comprises a first portion (506) primarily of RF electromagnetic energy and a second portion (508) primarily of microwave electromagnetic energy that follows the first portion. The second portion further comprises a plurality of RF pulses (510), wherein the first portion is to transition to the second portion when either a duration (512) of the first portion meets or exceeds a predetermined duration threshold or an impedance determined during the first portion meets or exceeds a predetermined threshold.

Microwave energy-delivery device and system

MICROWAVE ENERGY-DELIVERY DEVICE AND SYSTEM Abstract An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide (1032) and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device (20) for applying energy to the point of interest.

Microwave energy-delivery device and system

MICROWAVE ENERGY-DELIVERY DEVICE AND SYSTEM Abstract An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide (1032) and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device (20) for applying energy to the point of interest.

Temperature measurement in catheter

Ablation of cardiac tissue is carried out by inserting a probe having an ablation electrode and a plurality of microelectrodes into a body of a living subject to establish contact between two of the microelectrodes and target tissue, and energizing the ablation electrode. While the ablation electrode is energized impedances are measured between the microelectrodes, and the power level of the ablation electrode adjusted according to the impedances.

MODIFICATION OF AIRWAYS BY APPLICATION OF ENERGY

This relates to methods and devices for treating reversible chronic obstructive pulmonary disease, and more particularly, relates to a device for exchanging energy with airway tissue such as that found in the airway of human lungs. The exchange of energy with this airway tissue in the airways reduces the ability of the air ways to constrict and/or reduces the resistance within the airway to the flow of air through the airway. This also relates to a method for decreasing responsiveness or decreasing resistance to airflow of airways involves the transfer of energy to or from the airway walls to prevent or reduce airway constriction and other symptoms of lung diseases. The treatment reduces the ability of the airway to contract during an acute narrowing of the airways, reduces mucus plugging of the airways, and/or increases the airway diameter. The methods according to the present invention provide a longer duration and/or more effective treatment for lung diseases than currently used drug ...

MICROWAVE ENERGY-DELIVERY DEVICE AND SYSTEM

An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device for applying energy to the point of interest.

INDUCTIVELY HEATED SURGICAL TOOL

Oscillating electrical energy is delivered to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures. Thermal, electrosurgical and mechanical modalities may be combined in a surgical tool. Potentially damaging effects in a first modality may be minimized by using a secondary modality. In one example, thermal hemostasis may thus help electrosurgical applications avoid the adverse tissue effects associated with hemostatic monopolar electrosurgical waveforms while retaining the benefits of using monopolar incising waveforms.

CONTROL SYSTEM AND PROCESS FOR APPLICATION OF ENERGY TO AIRWAY WALLS AND OTHER MEDIUMS

The present invention includes a system for delivering energy to an airway wall of a lung comprising an energy delivering apparatus and a PID controller having one or more variable gain factors which are rest after energy deliver has begun. The energy delivering apparatus may include a flexible elongated member and a distal expandable basket having at least one electrode for transferring energy to the airway wall and at least one temperature sensor for measuring temperature. The PID controller determines a new power set point base on an error between a preset temperature and the measured temperature. The algorithm can be Pi+1 = Pi + G(.alpha.ei+.beta.ei-1+.gamma.ei-2) where .alpha., .beta. and .gamma. are preset values and .alpha. is from 1 to 2; .beta. is from -1 to -2; and .gamma. is from -0.5 to 0-5. In another variation, the controller is configured to shut down if various measured parameters are exceeded such as, for example, energy, impedance, temperature, temperature differences, ...

SYSTEMS FOR IDENTIFYING CATHETERS AND MONITORING THEIR USE

A catheter (14) carries a functional component (16), like an ablating electrode, having a predetermined operating character-istic. The catheter (14) also electronically retains an identification code that uniquely identifies the predetermined characteristic. The catheter (14) is capable of transmitting the identification code to an external reader in response to a predetermined prompt. An associated apparatus, like an ablating energy source (12), reads the identification code and compares it to predetermined op-erating criteria. The apparatus (12) will not permit interaction with the functional catheter component (16) if the identification code indicates that the functional characteristics of the catheter (14) are not suited for the intended interaction. The catheter (14) can also store usage information to prevent reuse.

ELECTROSURGICAL APPARATUS FOR DELIVERING RADIOFREQUENCY ENERGY AND MICROWAVE ENERGY AND A METHOD FOR ITS USE

ELECTRODE STRUCTURE FOR HEATING AND ABLATING TISSUE AND METHOD FOR MAKING AND ASSEMBLING THE SAME

L'invention concerne des procédés de fabrication de structures cellulosiques, telles que celles utilisées par exemple dans des ensembles d'électrode pouvant être déployés/repliés, dans des dispositifs d'électrophysiologie diagnostique et/ou thérapeutique. Un procédé préféré consiste à fournir un mandrin pourvu d'une partie tête et d'une partie col, la partie tête présentant une circonférence extérieure supérieure à celle de la partie col; à tremper ledit mandrin dans une substance cellulosique; à faire durcir ladite substance cellulosique; et à séparer le mandrin de la substance cellulosique durcie.

Tissue heating and ablation systems and methods using time-variable set point temperature curves for monitoring and control

Systems and methods employ an energy emitting electrode to heat tissue. The systems and methods follow a prescribed temperature set curve, in which a setpoint temperature changes over time, to control the application of energy to the electrode.

MECHANISMS FOR CONTROLLING DIFFERENT ELECTROMECHANICAL SYSTEMS OF AN ELECTROSURGICAL INSTRUMENT

DEVICE FOR DERMATOLOGICAL TREATMENT

ВЫЧИСЛЕНИЕ КАРТЫ ПЛОТНОСТИ ЭНЕРГИИ С ИСПОЛЬЗОВАНИЕМ ТЕРМОАКУСТИЧЕСКОГО РЕЖИМА

1. Медицинское устройство (300, 400, 500, 600, 700), содержащее:- систему (304) нагревания для нагревания целевой зоны (324) пациента (320);- процессор (330) для управления (340) системой (304) нагревания;- память (336), содержащая машинно-выполняемые команды, при этом выполнение команд побуждает процессор (330) получать (100, 200, 342) план лечения, причем выполнение команд дополнительно побуждает процессор (330) многократно:- нагревать (102, 202, 344) целевую зону (324) в течение чередующихся периодов нагревания и периодов охлаждения посредством управления (340) системой (304) нагревания с использованием плана лечения;- вычислять (104, 204, 346) текущую карту (350) плотности энергии в предварительно заданном объеме с использованием плана лечения и термоакустической модели, причем текущая плотность энергии многократно обновляется (348) в процессе нагревания целевой зоны (324);- вычислять (206, 346) карту (350) кумулятивной плотности энергии с использованием взвешенного осреднения текущих карт плотности энергии;- отображать (206, 402) карту (350) кумулятивной плотности энергии на дисплее; и- модифицировать (208, 404) план лечения в соответствии с картой (350) кумулятивной плотности энергии с учетом следующего акта нагревания.2. Медицинское устройство (300, 400, 500, 600, 700) по п. 1, в котором выполнение команд дополнительно побуждает процессор (330):- вычислять карту (350) кумулятивной плотности энергии суммированием многократно вычисляемых текущих карт плотности энергии с учетом оценки скорости охлаждения ткани.3. Медицинское устройство (300, 400, 500, 600, 700) по п. 1, в котором выполнение команд побуждает процессор (330):- определять (210, 406) карту (418) безопасного уровня мощности с использованием карты (350) кумулятивной плотности энергии; и- отображать (212, 408) карту (418) безопасного уровня мощности на дисплее.4. Медицинское устройство (300, 400, 500, 600, 700) по п. 1, в котором вы РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2014 144 313 A (51) МПК A61N 7/ ...

ИЗМЕРЕНИЕ ТЕМПЕРАТУРЫ В КАТЕТЕРЕ

... 1. Способ абляции, содержащий стадии:введения зонда в организм живого пациента, причем зонд имеет наконечник, электрод для абляции и множество микроэлектродов;образования контакта между двумя микроэлектродами и целевой тканью;подачи питания на электрод для абляции с определенным уровнем мощности;измерения сопротивления между двумя микроэлектродами, пока на электрод для абляции подается питание; ирегулировки уровня мощности электрода для абляции в зависимости от сопротивления.2. Способ по п. 1, далее содержащий стадии:неоднократного повторения стадии измерения сопротивления; иопределения температуры ткани по разнице в сопротивлении между первым измерением и вторым измерением.3. Способ по п. 2, далее содержащий стадии:определения того, что температура ткани превысила предопределенный предел; иснижения мощности электрода для абляции в зависимости от результатов определения.4. Способ по п. 3, в котором снижение мощности предусматривает деактивацию электрода для абляции путем снижения мощности ...

ABLATIONSELEKTRODE MIT ISOLIERTEM TEMPERATURMESSELEMENT

NONLINEAR MONITORING SYSTEMS FOR HEATING UP AND FOR CLEARING AWAY BODY FABRIC

SYSTEMS AND METHODS FOR THE ABLATION OF BODY FABRIC USING FORESEEABLE MAXIMUM FABRIC TEMPERATURE

FABRIC ABLATION SYSTEM

Control system and process for application of energy to airway walls and other mediums

Surgical generator for ultrasonic devices and for electrosurgical devices

A surgical generator (102) that may produce a drive signal or signals of particular voltages, currents, and frequencies, e.g. 55,500 cycles per second (Hz). The drive signal or signals may be provided to an ultrasonic surgical device (104), and specifically to a transducer. In one embodiment, the generator may be configured to produce a drive signal of a particular voltage, current, and/or frequency that can be stepped with high resolution, accuracy, and repeatability. Additionally, the surgical generator may generate a drive signal or signals with output power sufficient to perform bipolar electrosurgery using radio frequency (RF) energy. The drive signal may be provided, for example, to electrodes of the electrosurgical device (106). Accordingly, the generator may be configured for therapeutic purposes by applying electrical signals to an ultrasonic transducer or electrical energy to the tissue sufficient for treating the tissue (e.g., cutting, coagulation, cauterization, tissue welding ...

Systems and methods facilitating application of an appropriate thermal dosage in microwave ablation procedures

Provided in accordance with the present disclosure is a microwave ablation system including a microwave ablation probe configured to deliver energy to a target volume of tissue during an ablation procedure, at least one temperature sensor configured to determine a temperature of the target volume of tissue at a plurality of points in time during the ablation procedure, and a computing device operably coupled to the microwave ablation probe and the at least one temperature sensor. The computing device includes a processor and a memory storing instructions, which causes the computing device to load a temperature accumulation profile corresponding to the target volume of tissue, and dynamically control the microwave ablation probe in accordance with the temperature of the target volume of tissue at each of the points in time such that the temperature of the target volume of tissue follows the temperature accumulation profile during the ablation procedure.

SYSTEMS FOR IDENTIFYING CATHETERS AND MONITORING THEIR USE

... 2148714 9410921 PCTABS00032 A catheter (14) carries a functional component (16), like an ablating electrode, having a predetermined operating characteristic. The catheter (14) also electronically retains an identification code that uniquely identifies the predetermined characteristic. The catheter (14) is capable of transmitting the identification code to an external reader in response to a predetermined prompt. An associated apparatus, like an ablating energy source (12), reads the identification code and compares it to predetermined operating criteria. The apparatus (12) will not permit interaction with the functional catheter component (16) if the identification code indicates that the functional characteristics of the catheter (14) are not suited for the intended interaction. The catheter (14) can also store usage information to prevent reuse.

ABLATION ELECTRODE WITH INSULATED TEMPERATURE SENSING ELEMENTS

An ablation electrode (16) carries a temperature sensing element (94) for measuring the temperature of the tissue being ablated. A thermal insulating element (88) associated with the sensing element blocks the transfer of heat energy from between the temperature sensing element (94) and the electrode (16). The temperature sensing element therefore measures temperature without being affected by the surrounding thermal mass of the electrode (16).

METHOD FOR TREATING AIRWAYS IN THE LUNG

A device and method for treating bodily conduits involves the application of energy to the smooth muscle tissue of the conduit walls to reduce the bulk of smooth muscle tissue and mucus glands. The irradiation treatment of the smooth muscle tissue causes a reduction in the amount of smooth muscle tissue over time which increases the inner diameter of the body conduit for improved fluid flow and prevents smooth muscle spasms. The treatment is particularly useful in the lungs for treatment of asthma to prevent bronchospasms, increase the airway diameter for improved air exchange, and reduce mucus secretions in the lungs.

Method of treatment with adjustable ferromagnetic coated conductor thermal surgical tool

An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

MODIFIKATION DER LUFTWEGE DURCH ANWENDUNG VON ENERGIE

Surgical generator for ultrasonic devices and for electrosurgical devices

A surgical generator (102) that may produce a drive signal or signals of particular voltages, currents, and frequencies, e.g. 55,500 cycles per second (Hz). The drive signal or signals may be provided to an ultrasonic surgical device (104), and specifically to a transducer. In one embodiment, the generator may be configured to produce a drive signal of a particular voltage, current, and/or frequency that can be stepped with high resolution, accuracy, and repeatability. Additionally, the surgical generator may generate a drive signal or signals with output power sufficient to perform bipolar electrosurgery using radio frequency (RF) energy. The drive signal may be provided, for example, to electrodes of the electrosurgical device (106). Accordingly, the generator may be configured for therapeutic purposes by applying electrical signals to an ultrasonic transducer or electrical energy to the tissue sufficient for treating the tissue (e.g., cutting, coagulation, cauterization, tissue welding ...

ABLATION ELECTRODE WITH INSULATED TEMPERATURE SENSING ELEMENTS

DEVICE FOR DERMATOLOGICAL TREATMENT

A system for the treatment of targets under the skin of a patient comprising: a laser device for emitting a first series of laser pulses towards an area of the skin of a patient, where a target which must be reached by said laser pulses is located under said skin; a cooling system of said area of the skin by means of a cooling fluid; a first measurement sensor of a first temperature of said area of skin; a second measurement sensor of the temperature of said cooling fluid; said computer which receives the signals from said first and second temperature measurement sensor; said computer controls said laser device that emits a first series of laser pulses having predetermined power, duration and spacing; said temperature measurement sensor measures the temperature of said area of skin, following said first series of laser pulses; said computer calculates the predicted temperature reached of said area of the skin following the emission of a second series of pulses having said predetermined power, duration and spacing.

DETERMINATION PROCESS AND PREDICTIVE CLOSED-LOOP CONTROL OF DOSIMETRY USING MEASUREMENT OF SKIN SURFACE TEMPERATURE AND ASSOCIATED METHODS

A method for determining a suitable set of parameters for operating a light source within a photo -thermal targeted treatment system for targeting a chromophore embedded in a medium is disclosed. The method includes, before administration of a treatment protocol: 1) administering at least one laser pulse from the light source at a preset power level to a location to be treated, the preset power level being below a known damage threshold; 2) measuring a skin surface temperature at the location to be treated, following administration of the at least one laser pulse; 3) estimating a relationship between the parameters for operating the light source and the skin surface temperature; and 4) defining a safe operating range for the parameters for operating the light source in order to avoid thermal damage to the medium at the location to be treated while still effectively targeting the chromophore in administering the treatment protocol.

MICROWAVE ENERGY-DELIVERY DEVICE AND SYSTEM

An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device for applying energy to the point of interest.

Methods of treating a lung

A method for treating the lung dining an acute episode of reversible chronic obstructive pulmonary disease such as an asthma attack. The method comprises transferring energy to an airway wall of an airway such that a diameter of the airway is increased. The energy may be transferred to the airway wall prior to, during or after an asthma attack. The energy may be transferred in an amount sufficient to temporarily or permanently increase the diameter of the airway. The method may be performed while the airway is open, closed or partially closed.

TEMPERATURE MONITORING APPARATUS AND METHOD FOR MONITORING A TEMPERATURE WITHIN A TISSUE

A temperature monitoring apparatus (40) is disclosed for monitoring a temperature within a tissue (10), in particular during a thermal ablation process. The monitoring apparatus comprises a temperature application unit (42) configured to introduce heating power into the tissue for heating the tissue. The monitoring apparatus further comprises an ultrasound unit (44) for emitting and receiving ultrasound waves and for determining a temperature in the measurement region (22, 24) of the tissue on the basis of ultrasound shear wave detection. The monitoring apparatus further comprises a temperature estimation unit (46) including a heat transfer model (48) for estimating a temperature in a region of interest (26) within the tissue, wherein the heat transfer model is based on medical images of the tissue.

METHODS OF TREATING INFLAMMATION IN AIRWAYS

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

Katheter mit gespaltener Spitze und signalverarbeitendes HF-Ablationssystem

Systems and methods for estimating tissue parameters using surgical devices

Systems and methods for estimating tissue parameters, including mass of tissue to be treated and a thermal resistance scale factor between the tissue and an electrode of an energy delivery device, are disclosed. The method includes sensing tissue temperatures, estimating a mass of the tissue and a thermal resistance scale factor between the tissue and an electrode, and controlling an electrosurgical generator (102) based on the estimated mass and the estimated thermal resistance scale factor. The method may be performed iteratively and non-iteratively. The iterative method may employ a gradient descent algorithm that iteratively adds a derivative step to the estimates of the mass and thermal resistance scale factor until a condition is met. The non-iterative method includes selecting maximum and minimum temperature differences and estimating the mass and the thermal resistance scale factor based on a predetermined reduction point from the maximum temperature difference to the minimum temperature ...

ESTIMATING A TEMPERATURE DURING ABLATION

Described embodiments include an apparatus that includes an electrical interface and a processor. The processor is 5 configured to receive, via the electrical interface, a temperature sensed by a temperature sensor at a distal end of an intrabody probe, to estimate a temperature of tissue of a subject, based on the sensed temperature and a parameter of an ablating current driven, by an ablation electrode at the distal 0 end of the intrabody probe, into the tissue, and to generate an output in response to the estimated temperature. Other embodiments are also described. 3447024v1 1LLn -nl LL-J ...

Electrode structure for heating and ablating tissue and method for making and assembling the same

Control system and process for application of energy to airway walls and other mediums

SYSTEMS AND METHODS FACILITATING APPLICATION OF AN APPROPRIATE THERMAL DOSAGE IN MICROWAVE ABLATION PROCEDURES

Provided in accordance with the present disclosure is a microwave ablation system including a microwave ablation probe configured to deliver energy to a target volume of tissue during an ablation procedure, at least one temperature sensor configured to determine a temperature of the target volume of tissue at a plurality of points in time during the ablation procedure, and a computing device operably coupled to the microwave ablation probe and the at least one temperature sensor. The computing device includes a processor and a memory storing instructions, which causes the computing device to load a temperature accumulation profile corresponding to the target volume of tissue, and dynamically control the microwave ablation probe in accordance with the temperature of the target volume of tissue at each of the points in time such that the temperature of the target volume of tissue follows the temperature accumulation profile during the ablation procedure.

NON-LINEAR CONTROL SYSTEMS AND METHODS FOR HEATING AND ABLATING BODY TISSUE

Systems and methods employ an energy emitting electrode (16) to heat tissue. The systems and methods control the application of energy to the electrode (16) using adjustments that take into account, in a non-linear fashion, changes in monitored operating conditions.

Temperature distribution determining apparatus

本发明涉及一种用于确定由向对象施加能量引起的对象内温度分布的温度分布确定装置。温度分布测量单元（6、7）在向对象（3）施加能量从而使得对象（3）被加热到第一温度范围内的温度时测量对象（3）中的时空依赖的第一温度分布，并且温度分布估计单元（5）基于所测量的第一温度分布的时空依赖性估计第二温度范围内的对象（3）中的时空依赖的第二温度分布，其中第二温度范围不同于第一温度范围。由于温度分布不但能够第一温度范围中获得而且能够在第二温度范围中获得，因此可增加可确定温度分布的总的温度范围。

gerador cirúrgico, instrumento cirúrgico e sistema de instrumento cirúrgico

Adjustable ferromagnetic coated conductor thermal surgical tool

An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

System and method for measuring subsurface temperature of tissue during ablation

An RF ablation system comprises irrigated split tip electrode catheter, an RF generator and a signal processor. The catheter comprises four orthogonally arranged electrodes at the distal tip. The catheter is used to map the electrical activity of a heart chamber to locate site(s) of aberrant electrical pathways to be ablated. Once an ablation site has been located, the signal processor activates the RF generator to transmit a low level RF current to each electrode member of the split tip electrode. The signal processor receives signals indicative of the impedance between each electrode member and one or more surface indifferent electrodes and determines which electrode members are associated with the highest impedance. Such electrode members are those in greatest contact with the myocardium. The signal processor then automatically activates the RF generator to transmit an RF ablation current to the electrode members in contact with the myocardium to create a lesion.

THERAPEUTIC GUIDANCE COMPUTE NODE CONTROLLER

The various examples of the present disclosure are directed towards a multi-physics controller that can predict and monitor ablation procedures. In some examples of the present disclosure, fat saturation images can be used to create custom microwave ablation bioelectric/biothermal models. In some examples of the present disclosure, a deformation correction methodology can be used. Thereby, microwave and mechanics computational models can forecast therapeutic delivery intraoperatively while correcting for deformation.

Systems and methods facilitating application of an appropriate thermal dosage in microwave ablation procedures

Provided in accordance with the present disclosure is a microwave ablation system including a microwave ablation probe configured to deliver energy to a target volume of tissue during an ablation procedure, at least one temperature sensor configured to determine a temperature of the target volume of tissue at a plurality of points in time during the ablation procedure, and a computing device operably coupled to the microwave ablation probe and the at least one temperature sensor. The computing device includes a processor and a memory storing instructions, which causes the computing device to load a temperature accumulation profile corresponding to the target volume of tissue, and dynamically control the microwave ablation probe in accordance with the temperature of the target volume of tissue at each of the points in time such that the temperature of the target volume of tissue follows the temperature accumulation profile during the ablation procedure.

Surgical generator for ultrasonic devices and for electrosurgical devices

Abstract A surgical generator (102) that may produce a drive signal or signals of particular voltages, currents, and frequencies, e.g. 55,500 cycles per second (Hz). The drive signal or signals may be provided to an ultrasonic surgical device (104), and specifically 5 to a transducer. In one embodiment, the generator may be configured to produce a drive signal of a particular voltage, current, and/or frequency that can be stepped with high resolution, accuracy, and repeatability. Additionally, the surgical generator may generate a drive signal or signals with output power sufficient to perform bipolar electrosurgery using radio frequency (RF) energy. The drive signal may be provided, o for example, to electrodes of the electrosurgical device (106). Accordingly, the generator may be configured for therapeutic purposes by applying electrical signals to an ultrasonic transducer or electrical energy to the tissue sufficient for treating the tissue (e.g. cutting, coagulation, cauterization, ...

Systems and methods for estimating tissue parameters using surgical devices

Systems and methods for estimating tissue parameters, including mass of tissue to be treated and a thermal resistance scale factor between the tissue and an electrode of an energy delivery device, are disclosed. The method includes sensing tissue temperatures, estimating a mass of the tissue and a thermal resistance scale factor between the tissue and an electrode, and controlling an electrosurgical generator (102) based on the estimated mass and the estimated thermal resistance scale factor. The method may be performed iteratively and non-iteratively. The iterative method may employ a gradient descent algorithm that iteratively adds a derivative step to the estimates of the mass and thermal resistance scale factor until a condition is met. The non-iterative method includes selecting maximum and minimum temperature differences and estimating the mass and the thermal resistance scale factor based on a predetermined reduction point from the maximum temperature difference to the minimum temperature ...

TISSUE HEATING AND ABLATION SYSTEM

Systems and methods employ an energy emitting electrode (34) to heat tissue. The systems and methods derive a temperature prediction for a future time period. The systems and methods control the application of energy to the energy emitting electrode (34) based, at least in part, upon the temperature prediction.

SYSTEM FOR CONTROLLING TISSUE ABLATION USING TEMPERATURE SENSORS

This invention is a system and associated method to ablate body tissue using multiple emitters (30) of ablating energy. The system and method convey ablating energy individually to each emitter (30) in a sequence of power pulses. The system and method periodically sense the temperature of each emitter (30) and compare the sensed temperatures to a desired temperature established for all emitters (30) to generate a signal individually for each emitter (30) based upon the comparison. The system and method individually vary the power pulse to each emitter (30) based upon the signal for that emitter to maintain the temperatures of all emitters essentially at the desired temperature during tissue ablation.

NON-LINEAR CONTROL SYSTEMS AND METHODS FOR HEATING AND ABLATING BODY TISSUE

Systems and methods employ an energy emitting electrode (16) to heat tissue. The systems and methods control the application of energy to the electrode (16) using adjustments that take into account, in a non-linear fashion, changes in monitored operating conditions.

ABLATION ELECTRODE WITH INSULATED TEMPERATURE SENSING ELEMENTS

An ablation electrode (16) carries a temperature sensing element (94) for measuring the temperature of the tissue being ablated. A thermal insulating element (88) associated with the sensing eleme nt blocks the transfer of heat energy from between the temperature sensing element (94) and the electrode (16), The temperature sensing element therefore measures temperature without being affected by the surrounding thermal mass of the electrode (16) .

CONTROL AND DELIVERY OF ELECTRIC FIELDS VIA AN ELECTRODE ARRAY

A method of controlling electric fields created by a plurality of electrodes. The method includes repetitively applying multiple sets of voltages to at least some of a plurality of electrodes over a treatment period to achieve and maintain a target temperature, the at least some of the electrodes being treatment electrodes. The sets of voltages may be in patterns such that a unique current pattern between electrodes is created for each set of voltages, resulting in temperature averaging. The voltage at each electrode may be determined based on a temperature of an adjacent electrode. The voltage at each electrode may also or alternatively be determined based on an estimated voltage at the electrode.

MODIFICATION OF AIRWAYS BY APPLICATION OF ENERGY

This relates to methods and devices for treating reversible chronic obstructive pulmonary disease, and more particularly, relates to a device for exchanging energy with airway tissue such as that found in the airway of human lungs. The exchange of energy with this airway tissue in the airways reduces the ability of the air ways to constrict and/or reduces the resistance within the airway to the flow of air through the airway. This also relates to a method for decreasing responsiveness or decreasing resistance to airflow of airways involves the transfer of energy to or from the airway walls to prevent or reduce airway constriction and other symptoms of lung diseases. The treatment reduces the ability of the airway to contract during an acute narrowing of the airways, reduces mucus plugging of the airways, and/or increases the airway diameter. The methods according to the present invention provide a longer duration and/or more effective treatment for lung diseases than currently used drug ...

ELECTROSURGICAL APPARATUS AND METHOD FOR PROMOTING HAEMOSTASIS IN BIOLOGICAL TISSUE

An electrosurgical waveform having both radiofrequency (RF) energy and microwave energy components that is arranged to perform efficient haemostasis in biological tissue. The waveform comprises a first portion primarily of RF electromagnetic energy, and a second portion primarily of microwave electromagnetic energy that follows the first portion. The second portion further comprises a plurality of RF pulses, wherein the first portion transitions to the second portion when either a duration of the first portion meets or exceeds a predetermined duration threshold, or an impedance determined during the first portion meets or exceeds a predetermined threshold. The waveform is arranged to deliver energy rapidly so that haemostasis can occur in a short time frame in a situation where the maximum available power is limited, or to avoid undesirable thermal damage to the biological tissue.

TISSUE ABLATION SYSTEM

SYSTEM ZUR STEUERUNG VON GEWEBEABLATION MIT TEMPERATURSENSOREN

Inductively heated multi-mode surgical tool

Thermal, Electrosurgical and Mechanical modalities may be combined in a surgical tool. Potentially damaging effects in a first modality may be minimized by using a secondary modality. In one example, thermal hemostasis may thus help electrosurgical applications avoid the adverse tissue effects associated with hemostatic monopolar electrosurgical waveforms while retaining the benefits of using incising waveforms.

Devices and Systems for Carotid Body Ablation

Methods and endovascular catheters for assessing, and treating patients having sympathetically mediated disease, involving augmented peripheral chemoreflex and heightened sympathetic tone by reducing chemosensor input to the nervous system via transmural carotid body ablation.

SYSTEM AND METHOD FOR DISPLAYING AN ACTIVE HEATING ZONE DURING AN ABLATION PROCEDURE

A method of generating a representation of an active heating zone on a display in real time during an ablation procedure includes processing imaging data of a surgical site generated by an imaging device, navigating an ablation device in proximity to target tissue, delivering electrosurgical energy to the target tissue via the ablation device to generate an active heating zone, detecting a Doppler shift in the imaging data based on the delivery of electrosurgical energy to the target tissue, and generating a representation of the active heating zone relative to the surgical site based on the detected Doppler shift. 1. A method of generating a representation of an active heating zone on a display in real time during an ablation procedure , the method comprising:processing imaging data of a surgical site generated by an imaging device;navigating an ablation device in proximity to target tissue within the surgical site;delivering electrosurgical energy to the target tissue via the ablation device to generate an active heating zone;detecting a Doppler shift in the imaging data based on the delivery of electrosurgical energy to the target tissue; andgenerating a representation of the active heating zone relative to the surgical site based on the detected Doppler shift.2. The method according to claim 1 , wherein the representation of the active heating zone is a graphical representation of the active heating zone generated on a display by a processing unit coupled to the display and configured to process the imaging data generated by the imaging device.3. The method according to claim 1 , wherein generating the representation of the active heating zone includes indicating a clinical outcome prediction zone based on active heating intensity.4. The method according to claim 1 , further comprising verifying a position of the ablation device within the surgical site based on the representation of the active heating zone.5. The method according to claim 4 , further comprising ...

MICROWAVE ENERGY-DELIVERY DEVICE AND SYSTEM

An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device for applying energy to the point of interest. 120-. (canceled)21. An ablation system , comprising: a feedline including an outer conductor;', 'a balun operably coupled to the outer conductor of the feedline; and, 'a microwave ablation device includinga temperature sensor disposed in proximity to the balun and configured to sense a temperature of a portion of the feedline;a fluid delivery system configured to operably couple to the microwave ablation device and provide a fluid to the microwave ablation device; andan energy source configured to operably couple to the microwave ablation device and provide microwave energy to the microwave ablation device.22. The ablation system according to claim 21 , wherein the fluid delivery system includes a cooling unit configured to operably couple to the microwave ablation device and cool the fluid provided to the microwave ablation device.23. The ablation system according to claim 21 , wherein the balun is electrically shorted to the outer conductor.24. The ablation system according to claim 21 , wherein the energy source is configured to provide microwave energy to the microwave ablation device in response to the temperature of the portion of the feedline.25. The ablation system according to claim 21 , wherein the microwave ablation device further includes an outer tubular member disposed around the feedline and an inner tubular member disposed adjacent the feedline.26. The ablation system according to claim 25 , wherein the feedline claim 25 , the inner tubular member claim 25 , and the ...

SYSTEMS AND METHODS FOR ESTIMATING TISSUE PARAMETERS USING SURGICAL DEVICES

Systems and methods for estimating tissue parameters, including mass of tissue to be treated and a thermal resistance scale factor between the tissue and an electrode of an energy delivery device, are disclosed. The method includes sensing tissue temperatures, estimating a mass of the tissue and a thermal resistance scale factor between the tissue and an electrode, and controlling an electrosurgical generator based on the estimated mass and the estimated thermal resistance scale factor. The method may be performed iteratively and non-iteratively. The iterative method may employ a gradient descent algorithm that iteratively adds a derivative step to the estimates of the mass and thermal resistance scale factor until a condition is met. The non-iterative method includes selecting maximum and minimum temperature differences and estimating the mass and the thermal resistance scale factor based on a predetermined reduction point from the maximum temperature difference to the minimum temperature difference. 19-. (canceled)10. A method of controlling a system that includes a generator that generates energy to treat tissue , the method comprising:providing a test signal to the tissue;sensing temperatures of the tissue and an electrode of the system a predetermined number of times;calculating a temperature difference for each sensed temperature value;estimating mass of the tissue and a thermal resistance scale factor between the tissue and the electrode; andgenerating a control signal to control an output stage of the generator based on the estimated mass of the tissue and the estimated thermal resistance scale factor.11. The method according to claim 10 , wherein the mass of the tissue and the thermal resistance scale factor are estimated based on the sensed temperatures and the calculated changes in temperature.12. The method according to claim 11 , wherein estimating the mass of the tissue and a thermal resistance scale factor includes:calculating an initial mass estimate ...

REAL-TIME 3D MICROWAVE MONITORING OF THERMAL THERAPY

A method for determining a change of temperature of an object. The method may include heating an object and measuring scattering parameters (S-parameters) of scattered microwave electric fields from the object. A distorted Born iterative method may be used to determine a change of a dielectric property of the object based on the measured S-parameters. A change of temperature of the object may be determined based on the change of the dielectric property of the object. 1. A method for determining a change of temperature of an object , comprising:heating the object in a monitored region;measuring scattering parameters (S-parameters) of scattered microwave electric fields from the object;iteratively updating a dielectric background and electric field of the monitored region based on the measured S-parameters;determining a change of a dielectric property of the object based on the updated dielectric background and the updated electric field; anddetermining a change of temperature of the object based on the change of the dielectric property of the object.2. The method of claim 1 , wherein a vector network analyzer measures the S-parameters.3. The method of claim 1 , wherein the object comprises one of tissue or a component.4. The method of claim 1 , wherein the step of heating the object comprises thermal therapy.5. The method of claim 1 , further comprising determining dielectric properties of the object before the heating.6. The method of claim 5 , further comprising forming a dielectric map of the object based on the dielectric properties of the object before the heating.7. The method of claim 1 , wherein the updated dielectric background and the updated electric field are produced based on a distorted Born iterative method.8. The method of claim 1 , wherein the change of the dielectric property of the object is determined based on an electric field volume integral equation.9. The method of claim 1 , wherein the iterative update of the dielectric background and the ...

Medical image processing apparatus

A medical image processing apparatus according to a first embodiment includes processing circuitry. The processing circuitry is configured to generate information related to temperature by using a first image obtained by imaging one or more observation regions prior to treatment and at least one second image obtained by imaging the one or more observation regions during the treatment, generate alert information on a basis of the information related to temperature, and cause a display to output the alert information together with the information related to temperature.

Thermally adjustable surgical system and method

A power source delivers oscillating electrical energy to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

Real-time ultrasound monitoring for ablation therapy

A system for monitoring an ablation therapy may include an ultrasound transmitter to transmit ultrasound signals through a region of tissue during an ablation procedure, an ultrasound receiver to receive the ultrasound signals after the ultrasound signals have passed through the region of tissue, and a signal processor to communicate with the ultrasound transmitter and the ultrasound receiver to obtain a set of measurements related to the ultrasound signals transmitted through the region of tissue during the ablation procedure. The signal processor may determine one or more acoustic characteristics of the ultrasound signals transmitted through the region of tissue based on the set of measurements and generate an image representing a thermal map of the region of tissue during the ablation procedure based on a mapping between the one or more acoustic characteristics of the ultrasound signals and changes in temperature.

Surgical generator for ultrasonic and electrosurgical devices

A method for determining motional branch current in an ultrasonic transducer of an ultrasonic surgical device over multiple frequencies of a transducer drive signal. The method may comprise, at each of a plurality of frequencies of the transducer drive signal, oversampling a current and voltage of the transducer drive signal, receiving, by a processor, the current and voltage samples, and determining, by the processor, the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and the frequency of the transducer drive signal.

ESTIMATING A TEMPERATURE DURING ABLATION

Described embodiments include an apparatus that includes an electrical interface and a processor. The processor is configured to receive, via the electrical interface, a temperature sensed by a temperature sensor at a distal end of an intrabody probe, to estimate a temperature of tissue of a subject, based on the sensed temperature and a parameter of an ablating current driven, by an ablation electrode at the distal end of the intrabody probe, into the tissue, and to generate an output in response to the estimated temperature. Other embodiments are also described. 1. Apparatus , comprising:an electrical interface; and to receive, via the electrical interface, a temperature sensed by a temperature sensor at a distal end of an intrabody probe,', 'to estimate a temperature of tissue of a subject, based on the sensed temperature and a parameter of an ablating current driven, by an ablation electrode at the distal end of the intrabody probe, into the tissue, and', 'to generate an output in response to the estimated temperature., 'a processor, configured2. The apparatus according to claim 1 , wherein the parameter includes a power of the ablating current.3. The apparatus according to claim 1 , wherein the parameter includes an amplitude of the ablating current.4. The apparatus according to claim 1 , wherein the processor is configured to estimate the temperature of the tissue by:selecting a coefficient in response to the parameter, andmultiplying, by the coefficient, a value that is based on the sensed temperature.50. The apparatus according to claim 4 , wherein the processor is configured to estimate the temperature of the tissue as T+α(T−T) claim 4 , Tbeing the sensed temperature claim 4 , α being the coefficient claim 4 , and Tbeing a quantity based on a temperature T_ that was sensed by the temperature sensor prior to the driving of the ablating current.60. The apparatus according to claim 5 , wherein the processor is further configured to compute Tas T_−β claim 5 , β ...

Microwave energy-delivery device and system

An ablation system including an image database storing a plurality of computed tomography (CT) images of a luminal network and a navigation system enabling, in combination with an endoscope and the CT images, navigation of a locatable guide and an extended working channel to a point of interest. The system further includes one or more fiducial markers, placed in proximity to the point of interest and a percutaneous microwave ablation device for applying energy to the point of interest.

TEMPERATURE MEASUREMENT IN CATHETER

Ablation of cardiac tissue is carried out by inserting a probe having an ablation electrode and a plurality of microelectrodes into a body of a living subject to establish contact between two of the microelectrodes and target tissue, and energizing the ablation electrode. While the ablation electrode is energized impedances are measured between the microelectrodes, and the power level of the ablation electrode adjusted according to the impedances. 1. A method of ablation , comprising the steps of:inserting a probe into a body of a living subject, the probe having a tip, an ablation electrode and a plurality of microelectrodes;establishing a contacting relationship between two of the microelectrodes and a target tissue;energizing the ablation electrode at a power level;while the ablation electrode is energized, measuring impedances of the microelectrodes and determining a pair of the microelectrodes having a highest and second highest impedance for determining a bipolar impedance between the pair of the microelectrodes; andresponsively to the bipolar impedance, adjusting the power level of the ablation electrode.2. The method according to claim 1 , further comprising the steps of:iteratively performing the step of measuring an impedance; andestimating a tissue temperature from a change between a first performance and a second performance of measuring an impedance.3. The method according to claim 2 , further comprising the steps of:making a determination that the tissue temperature exceeds a predetermined limit; andresponsively to the determination reducing the power of the ablation electrode.4. The method according to claim 3 , wherein reducing the power comprises deactivating the ablation electrode by reducing the power to zero.5. The method according to claim 1 , wherein measuring an impedance comprises polling the microelectrodes to determine pairwise impedances therebetween.6. The method according to claim 1 , wherein establishing a contacting relationship ...

ABLATION THERAPY PLANNING SYSTEM

It is an object of the invention to improve the patient safety during thermal ablation. This object is achieved by an ablation therapy planning system, configured to carry out the steps of: receiving a medical image of a patient, and receiving an input defining an intended treatment location for one or more thermal applicators relative to a skin location and one or more intended treatment parameters and determining a location of a skin of the patient and estimating a temperature or thermal dose at the skin location resulting from the intended treatment location and one or more intended treatment parameters and raising an alarm if the calculated temperature or thermal dose at the skin location is above or below a certain threshold. 1. An ablation therapy planning system , comprising program code means for causing the ablation therapy planning system to carry out the steps of:receiving a medical image of a patient, and receiving an input defining an intended treatment location for one or more thermal applicators relative to a skin location and one or more intended treatment parameters and;determining a location of a skin of the patient and;estimating a temperature or thermal dose at the skin location resulting from the intended treatment location and one or more intended treatment parameters and;raising an alarm if the calculated temperature or thermal dose at the skin location is above or below a certain threshold.2. An ablation therapy planning system as claimed in claim 1 , wherein the treatment parameters are a fixed set of parameter configurations to encode different ablation zones claim 1 , isotherms or isodoses.3. An ablation therapy planning system as claimed in claim 2 , wherein the ablation therapy planning system is configured for raising an alarm when predefined isotherms or isodose lines are intersecting the skin location or are within a predefined distance from the skin location.4. An ablation therapy planning system as claimed in claim 1 , wherein the ...

Control and delivery of electric fields via an electrode array

A method of controlling electric fields created by a plurality of electrodes. The method includes repetitively applying multiple sets of voltages to at least some of a plurality of electrodes over a treatment period to achieve and maintain a target temperature, the at least some of the electrodes being treatment electrodes. The sets of voltages may be in patterns such that a unique current pattern between electrodes is created for each set of voltages, resulting in temperature averaging. The voltage at each electrode may be determined based on a temperature of an adjacent electrode. The voltage at each electrode may also or alternatively be determined based on an estimated voltage at the electrode.

Surgical generator for ultrasonic and electrosurgical devices

In accordance with various embodiments, methods to control electrical power provided to tissue via first and second electrodes may comprise providing a drive signal to the tissue via the first and second electrodes and modulating a power provided to the tissue via the drive signal based on a sensed tissue impedance according to a first power curve. The first power curve may define, for each of a plurality of potential sensed tissue impedances, a first corresponding power. The methods may also comprise monitoring a total energy provided to the tissue via the first and second electrodes. When the total energy reaches a first energy threshold, the methods may comprise determining whether an impedance of the tissue has reached a first impedance threshold. The methods may further comprise, conditioned upon the impedance of the tissue failing to reach the first impedance threshold, modulating the power provided to the tissue via the drive signal based on the sensed tissue impedance according to a second power curve. The second power curve may define, for each of the plurality of potential sensed tissue impedances, a second corresponding power.

Surgical generator for ultrasonic and electrosurgical devices

A control circuit configured to receive a control signal that defines a first phase and a second phase from a surgical generator. The control circuit may include a first resistor, a second resistor in parallel with the first resistor, and a switch in series with the second resistor. The switch may be configured to transition between an open state and a closed state corresponding to an operational mode of a surgical instrument. In the first phase of the control signal, the control circuit is configured to communicate surgical instrument information to the surgical generator. In the second phase of the control signal and in the open state of the switch, the control circuit is configured to provide a first output. In the second phase of the control signal and in the closed state of the switch, the control circuit is configured to provide a second output.

Determination process and forecast control with feedback dosimetry using measurement of skin surface temperature and correct methods

FIELD: medical technology. SUBSTANCE: inventions relates to medical technology. Determination of a suitable set of parameters for the operation of a radiation source in a photothermal targeted therapy system for targeted action on a chromophore embedded in a medium is disclosed. Before using the therapy protocol, the following is carried out: 1) applying at least one laser pulse from a radiation source with a preset power level at the location to be treated, the preset power level being below a known damage threshold; 2) measuring the temperature of the skin surface at the location to be treated after application of the at least one laser pulse; 3) evaluation of the relationship between the parameters of the radiation source and the temperature of the skin surface; and 4) defining a safe operating range for the radiation source to prevent thermal damage to the environment at the location to be treated, provided that the chromophore is effectively targeted when the therapy protocol is applied. EFFECT: photothermal targeted therapy improvement. 15 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 765 091 C1 (51) МПК A61B 18/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК A61B 18/20 (2021.08) (21)(22) Заявка: 2021114363, 21.10.2019 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): ЭККЬЮР ЭКНИ, ИНК. (US) Дата регистрации: 25.01.2022 Приоритет(ы): (30) Конвенционный приоритет: 26.11.2018 US 62/771,523; 22.10.2018 US 62/749,104 (45) Опубликовано: 25.01.2022 Бюл. № 3 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 24.05.2021 (86) Заявка PCT: 2 7 6 5 0 9 1 (56) Список документов, цитированных в отчете о поиске: US 20140121631 A1, 01.05.2014. US 20130178916 A1, 11.07.2013. RU 2620357 C2, 24.05.2017. EP 2499985 A1, 19.09.2012. US 20140371736 A1, 18.12.2014. R U 21.10.2019 (72) Автор(ы): ХОФВАНДЕР, Хенрик (HU) 2 7 6 5 0 9 1 R U C 1 C 1 US 2019/057209 (21.10.2019) (87) ...

使用皮肤表面温度测量和相关联方法的剂量测定的确定过程和预测闭环控制

公开了一种用于确定合适的参数集合的方法，所述合适的参数集合用于操作用于靶向包埋在介质中的发色团的光热靶向治疗系统内的光源。所述方法包括，在施用治疗方案之前：1）以预设功率水平向待治疗的位置施用来自光源的至少一个激光脉冲，预设功率水平在已知损伤阈值以下；2）在施用所述至少一个激光脉冲之后，测量待治疗位置处的皮肤表面温度；3）估计用于操作光源的参数和皮肤表面温度之间的关系；以及4）限定用于操作光源的参数的安全操作范围，以便避免对待治疗的位置处的介质的热损伤，同时在施用治疗方案中仍然有效地靶向发色团。

Methods and apparatuses for planning, performing, monitoring and assessing thermal ablation

A thermal ablation system is operable to perform thermal ablation using an x-ray system to measure temperature changes throughout a volume of interest in a patient. Image data sets captured by the x-ray system during a thermal ablation procedure provide temperature change information for the volume being subjected to the thermal ablation. Intermediate image data sets captured during the thermal ablation procedure may be fed into a system controller, which may modify or update a thermal ablation plan to achieve volume coagulation necrosis targets. The thermal ablation may be delivered by a variety of ablation modes including radiofrequency ablation, microwave therapy, high intensity focused ultrasound, laser ablation, and other interstitial heat delivery methods. Methods of performing thermal ablation using x-ray system temperature measurements as a feedback source are also provided. Methods of assessing the post-ablation status of the patient and performance of the system are also provided.

Surgical tool with inductively heated regions

An electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region, is fed from a high frequency alternating current source. The ferromagnetic material has a quick response in heating and cooling to the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

Aesthetic method of biological structure treatment by magnetic field

In combined methods for treating a patient using time-varying magnetic field, treatment methods combine various approaches for aesthetic treatment. A magnetic field generating device is placed proximate to a body region of the patient. The magnetic field generating device generates a time-varying magnetic field with a magnetic flux density in a range of 0.5 to 7 Tesla. The time-varying magnetic field is applied to the body region of the patient in order to cause a contraction of a muscle within the body region. A second therapy may be used by applying one or more of optical waves, radio frequency waves, mechanical waves, negative or positive pressure or heat to the body region of the patient.

Controlling an ultrasonic surgical instrument according to tissue location

Various systems and methods for controlling an ultrasonic surgical instrument according to the location of tissue grasped within an end effector are disclosed. A control circuit can be configured to apply varying power levels, via a generator, to an ultrasonic transducer driving an ultrasonic electromechanical system to oscillate an ultrasonic blade. Further, the control circuit can measure impedances of the ultrasonic transducer corresponding to the varying power levels and determine a location of tissue positioned within the end effector according to a difference between the impedances of the ultrasonic transducer relative to a threshold.

Determining the state of an ultrasonic end effector

Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.

Systems for identifying catheters and monitoring their use

A catheter carries a functional component, like an ablating electrode, having a predetermined operating characteristic. The catheter also electronically retains an identification code that uniquely identifies the predetermined operating characteristic. The catheter is capable of transmitting the identification code to an external reader in response to a predetermined prompt. An associated apparatus, like an ablating energy source, reads the identification code and compares it to predetermined operating criteria. The apparatus will not permit interaction with the functional catheter component, if the identification code indicates that the functional characteristics of the catheter are not suited for the intended interaction. The catheter can also store usage information, to prevent reuse.

Temperature feedback monitor for hemostatic surgical instrument

A temperature feedback device and method is provided for the monitoring of tissue treatment status during the application of surgical heating energy. In a preferred embodiment a function of the temperature over time is used to determine when coagulation of tissue has occurred to a desired degree. Preferably an electrosurgical hemostatic energy is used to coagulate tissue. A feedback signal is provided to a user or to a controller of an electrosurgical energy source to control delivery of energy to the tissue.

Tissue heating and ablation systems and methods using self-heated electrodes

Systems and methods using an electrode able to transmit heating or ablation energy into tissue include first and second sensing elements associated with the electrode for measuring first and second temperatures. The electrode also includes a heating element in thermal conductive contact with the electrode for heating the electrode. The systems and methods sequentially activate the heating element and sense temperatures without transmitting tissue heating or ablation energy, and then transmit heating or ablation energy and sense temperatures without activating the heating element, to derive from the sensed temperatures a prediction of maximum tissue temperature.

Systems and methods for controlling power in an electrosurgical probe

Systems and methods for controlling the power supplied to an electrosurgical probe. The systems and methods may be used to monitor electrode-tissue contact, adjust power in response to a loss of contact, and apply power in such a manner that charring, coagulum formation and tissue popping are less likely to occur.

ELECTRODE FOR ABLATION THAT INCLUDES ISOLATED TEMPERATURE DETECTORS.

UN ELECTRODO DE ABLACION (16) PORTA ELEMENTOS SENSIBLES A LA TEMPERATURA (94) PARA MEDIR LA TEMPERATURA DEL TEJIDO QUE VA A SER ELIMINADO.UN ELEMENTO AISLANTE TERMICO (88)ASOCIADO A LOS BLOQUES DE ELEMENTOS SENSIBLES TRANSFIERE LA ENERGIA CALORIFICA ENTRE EL ELEMENTO (94) Y EL ELECTRODO. EL ELEMENTO (94) MIDE LA TEMPERATURA SIN SER AFECTADO POR LA MASA TERMICA DE ELECTRODOS QUE LE RODEA. AN ABLATION ELECTRODE (16) CARDS TEMPERATURE SENSITIVE ELEMENTS (94) TO MEASURE THE TEMPERATURE OF THE FABRIC TO BE REMOVED. 94) AND THE ELECTRODE. ELEMENT (94) MEASURES TEMPERATURE WITHOUT BEING AFFECTED BY THE THERMAL MASS OF ELECTRODES THAT SURROUND IT.

Tissue heating and ablation systems and methods using predicted temperature for monitoring and control

Systems and methods employ an energy emitting electrode to heat tissue. The systems and methods derive a temperature prediction for a future time period. The systems and methods control the application of energy to the energy emitting electrode based, at least in part, upon the temperature prediction.

Cardial ablation systems using temperature monitoring

A cardial ablation system (10) and method employs an ablation electrode (16) having an energy emitting body (92). A temperature sensing element (94) senses the temperature of the tissue being ablated by the electrode (16). The system (10) monitors tissue temperature using the temperature sensing element (94). A control element (12) controls the therapeutic characteristics of the ablated lesion based upon sensed tissue temperature conditions.

Systems and methods for sensing temperature within the body

Systems and methods well suited for use in catheter based tissue ablation systems employ thermocouples (80) for temperature sensing at an energy emitter site (30). The sensed temperature is used to control the energy output from the energy source to maintain tissue temperature within desired parameters. The systems combine accuracy with compact, low profile construction.

Systems and methods for ablating body tissue using predicted maximum tissue temperature

Systems and methods ablate body tissue using an electrode for contacting tissue at a tissue-electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element to remove heat from the electrode at a determinable rate. The systems and methods employ a processing element to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue-electrode interface. The processing element controls the power level of ablation energy transmitted by the electrode, or the rate at which the electrode is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.

System for controlling tissue ablation using temperature sensors

This invention is a system and associated method to ablate body tissue using multiple emitters (30) of ablating energy. The system and method convey ablating energy individually to each emitter (30) in a sequence of power pulses. The system and method periodically sense the temperature of each emitter (30) and compare the sensed temperatures to a desired temperature established for all emitters (30) to generate a signal individually for each emitter (30) based upon the comparison. The system and method individually vary the power pulse to each emitter (30) based upon the signal for that emitter to maintain the temperatures of all emitters essentially at the desired temperature during tissue ablation.

Tissue heating and ablation systems and methods which predict maximum tissue temperature

Systems and methods heat or ablate body tissue by positioning an electrode to transmit heat or ablation energy to a tissue region. The systems and methods measure a first temperature using a temperature sensing element associated with the electrode. The systems and methods also measure a second temperature using a temperature sensing element associated with the electrode. The systems and methods process at least one of the first and second temperatures to derive a prediction of maximum temperature of the tissue region. The systems and methods generate an output that controls the transmission of the heating or ablation energy based, at least in part, upon the maximum tissue temperature prediction.

Systems and methods for controlling power in an electrosurgical probe

Systems and methods for controlling the power supplied to an electrosurgical probe. The systems and methods may be used to monitor electrode-tissue contact, adjust power in response to a loss of contact, and apply power in such a manner that charring, coagulum formation and tissue popping are less likely to occur.

MODIFYING AIRWAYS BY EXERCISING ENERGY

Surgical generator for ultrasonic and electrosurgical devices

A surgical generator is disclosed including an ultrasonic generator module to provide at an ultrasonic drive signal for driving an ultrasonic surgical device and an electrosurgical generator module to provice an electrosurgical drive signal for driving an electrosurgical device. At least one of providing the ultrasonic drive signal or providing the electrosurgical drive signal includes recalling a waveform sample from a look-up table (LUT), modifying the waveform sample to generate a modified waveform based on voltage and current feedback information to pre-distort the waveform sample on a dynamic ongoing basis, indexing each stored voltage and current feedback data pair based on a corresponding LUT sample that was output when the voltage and current feedback data pair was acquired, synchronizing the LUT sample and the voltage and current feedback data pair to correct timing and stability of the pre-distorted waveform sample, and providing the modified waveform to an output stage.

Surgical generator method for controlling and ultrasonic transducer waveform for ultrasonic and electrosurgical devices

A method for controlling a waveform shape of a motional branch current in an ultrasonic transducer of a surgical device. The method may comprise generating a transducer drive signal by selectively recalling, using a direct digital synthesis (DDS) algorithm, drive signal waveform samples stored in a look-up table (LUT), generating samples of current and voltage of the transducer drive signal when the transducer drive signal is communicated to the surgical device, determining samples of the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and a frequency of the transducer drive signal, comparing each sample of the motional branch current to a respective target sample of a target waveform to determine an error amplitude, and modifying the drive signal waveform samples stored in the LUT such that an amplitude error between subsequent samples of the motional branch current and respective target samples is reduced.

Surgical generator for ultrasonic and electrosurgical devices

A surgical generator for providing a drive signal to a surgical device may have a receptacle assembly having a receptacle body, a flange and a central protruding portion. The outer periphery of the central protruding portion may have at least one curved section and at least one linear section. Additionally, a surgical instrument may comprise an electrical connector assembly having a flange. The flange may comprise at least one curved section and at least one linear section. In some embodiments, A surgical instrument system may comprise a surgical generator, a surgical instrument comprising a connector assembly, and an adapter assembly operatively coupled to the receptacle assembly and the connector assembly.

Surgical generator for ultrasonic and electrosurgical devices

A surgical device control circuit. The control circuit may comprise a first circuit portion comprising at least one first switch. The first circuit portion may communicate with a surgical generator over a conductor pair. The control circuit may also comprise a second circuit portion comprising a data circuit element. The data circuit element may be disposed in an instrument of the surgical device and transmit or receive data. The data circuit element may implement data communications with the surgical generator over at least one conductor of the conductor pair.

Surgical generator for ultrasonic and electrosurgical devices

A method for determining motional branch current in an ultrasonic transducer of an ultrasonic surgical device over multiple frequencies of a transducer drive signal. The method may comprise, at each of a plurality of frequencies of the transducer drive signal, oversampling a current and voltage of the transducer drive signal, receiving, by a processor, the current and voltage samples, and determining, by the processor, the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and the frequency of the transducer drive signal.

Surgical generator for ultrasonic and electrosurgical devices

A method for determining motional branch current in an ultrasonic transducer of an ultrasonic surgical device over multiple frequencies of a transducer drive signal. The method may comprise, at each of a plurality of frequencies of the transducer drive signal, oversampling a current and voltage of the transducer drive signal, receiving, by a processor, the current and voltage samples, and determining, by the processor, the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and the frequency of the transducer drive signal.

Surgical generator for ultrasonic and electrosurgical devices

In accordance with various embodiments, methods for controlling electrical power provided to tissue via a surgical device may comprise providing a drive signal to a surgical device; receiving an indication of an impedance of the tissue; calculating a rate of increase of the impedance of the tissue; and modulating the drive signal to hold the rate of increase of the impedance greater than or equal to a predetermined constant.

Surgical generator for ultrasonic and electrosurgical devices

A surgical device control circuit. The control circuit may comprise a first circuit portion comprising at least one first switch. The first circuit portion may communicate with a surgical generator over a conductor pair. The control circuit may also comprise a second circuit portion comprising a data circuit element. The data circuit element may be disposed in an instrument of the surgical device and transmit or receive data. The data circuit element may implement data communications with the surgical generator over at least one conductor of the conductor pair.

Surgical generator for ultrasonic and electrosurgical devices

In accordance with various embodiments, a surgical generator for providing a drive signal to a surgical device may comprise a first transformer and a second transformer. The first transformer may comprise a first primary winding and a first secondary winding. The second transformer may comprise a second primary winding and a second secondary winding. The surgical generator may further comprise a generator circuit to generate the drive signal. The generator circuit may be electrically coupled to the first primary winding to provide the drive signal across the first primary winding. The surgical generator may also comprise a patient-side circuit electrically isolated from the generator circuit. The patient-side circuit may be electrically coupled to the first secondary winding. Further, the patient-side circuit may comprise first and second output lines to provide the drive signal to the surgical device. In addition, the surgical generator may comprise a capacitor. The capacitor and the second secondary winding may be electrically coupled in series between the first output line and ground.

Device for dermatological treatment with control of change of internal parameters in process

FIELD: medicine.SUBSTANCE: group of inventions relates to medical equipment. System for treating targets under the skin of a patient comprises a laser device for emitting a first sequence of laser pulses towards an area of the patient's skin, wherein the target to be reached by the laser pulses is located under the skin; skin area cooling system by means of cooling fluid medium; a first sensor for measuring a first temperature of the skin area; second sensor for measuring temperature of the cooling fluid; a computer which receives signals from the first and second temperature measuring sensors and controls the laser device. Temperature measurement sensor measures temperature of skin area after first sequence of laser pulses, and the computer calculates the predicted temperature reached by said skin region after emitting a second sequence of pulses having said predetermined power, duration and interval.EFFECT: disclosed is a dermatological treatment device with control of changes in internal parameters in the process.10 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 767 894 C1 (51) МПК A61B 18/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК A61B 18/20 (2022.01) (21)(22) Заявка: 2021112442, 04.10.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): КВАНТА СИСТЕМ С.П.А. (IT) 22.03.2022 (56) Список документов, цитированных в отчете о поиске: US 2014121631 A1, 01.05.2014. WO 2018098274 A1, 31.05 2018. US 2009012515 A1, 08.01.2009. WO 2012075419 A2, 07.06.2012. RU 2635477 C2, 13.11.2017. 08.10.2018 IT 102018000009253 (45) Опубликовано: 22.03.2022 Бюл. № 9 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 11.05.2021 (86) Заявка PCT: 2 7 6 7 8 9 4 R U (87) Публикация заявки PCT: WO 2020/075025 (16.04.2020) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" (54) УСТРОЙСТВО ДЛЯ ...

For Vltrasonic device and the electrosurgical generator for electro-surgical device

本发明公开了一种外科发生器(102)，所述外科发生器可产生特定电压、电流和频率(如55，500周期/秒(Hz))的驱动信号。可将所述驱动信号提供到超声外科装置(104)，并且具体地讲提供到换能器。在一个实施例中，所述发生器可能够产生特定电压、电流和/或频率输出信号的驱动信号，所述输出信号可在高分辨率、精确性和再现性的情况下阶跃。另外，所述外科发生器可产生驱动信号，所述驱动信号具有足以使用射频(RF)能量进行双极电外科手术的输出功率。可将所述驱动信号提供到(例如)所述电外科装置(106)的电极。因此，所述发生器能够通过以下方法而被构造用于治疗目的：将电信号施加到超声换能器、或将足以用于处理所述组织(如切割、凝固、烧灼、组织焊接等)的电功率施加到所述组织。

Methods of evaluating individuals having reversible obstructive pulmonary disease

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

Method for treating an asthma attack

A method for treating the lung during an acute episode of reversible chronic obstructive pulmonary disease such as an asthma attack. The method comprises transferring energy to an airway wall of an airway such that a diameter of the airway is increased. The energy may be transferred to the airway wall prior to, during or after an asthma attack. The energy may be transferred in an amount sufficient to temporarily or permanently increase the diameter of the airway. The method may be performed while the airway is open, closed or partially closed.

Methods of treating lungs having reversible obstructive pulmonary disease

This relates to treating a lung having at least one symptom of reversible obstructive pulmonary disease, and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device to at least reduce the ability of the lung to produce at least one of the symptoms of reversible obstructive pulmonary disease. This also includes additional steps that reduce the ability of the lung to produce at least one of the symptoms of reversible obstructive pulmonary disease and to reduce the resistance to the flow of air through a lung.

Method for treating an asthma attack

A method for treating the lung during an acute episode of reversible chronic obstructive pulmonary disease such as an asthma attack. The method comprises transferring energy to an airway wall of an airway such that a diameter of the airway is increased. The energy may be transferred to the airway wall prior to, during or after an asthma attack. The energy may be transferred in an amount sufficient to temporarily or permanently increase the diameter of the airway. The method may be performed while the airway is open, closed or partially closed.

Methods for treating airways

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

Temperature Distribution determining device

本发明涉及一种用于确定由向对象施加能量引起的对象内温度分布的温度分布确定装置。温度分布测量单元（6、7）在向对象（3）施加能量从而使得对象（3）被加热到第一温度范围内的温度时测量对象（3）中的时空依赖的第一温度分布，并且温度分布估计单元（5）基于所测量的第一温度分布的时空依赖性估计第二温度范围内的对象（3）中的时空依赖的第二温度分布，其中第二温度范围不同于第一温度范围。由于温度分布不但能够第一温度范围中获得而且能够在第二温度范围中获得，因此可增加可确定温度分布的总的温度范围。

System and method convenient for applying thermal dose appropriate in microwave ablation program

根据本公开提供了一种微波消融系统，其包括：微波消融探针，其被配置成在消融程序期间将能量输送到组织的目标体积；至少一个温度传感器，其被配置成在消融程序期间在多个时间点处确定组织的目标体积的温度；以及计算装置，其可操作地耦合到所述微波消融探针和所述至少一个温度传感器。所述计算装置包括处理器和存储指令的存储器，所述指令使计算装置加载与组织的目标体积相对应的温度累积曲线，并根据组织的目标体积在每个时间点处的温度动态地控制微波消融探针，使得组织的目标体积的温度在消融程序期间遵循温度累积曲线。

The operation tool of eddy-current heating

将振荡电能输送到电导体，例如导线或导管，其在选择区域中沿圆周涂覆有铁磁性材料。利用高频电能，铁磁性材料在加热和冷却方面具有快速响应，加热和冷却能通过能控制的功率输送来调节。铁磁性材料能在很多手术程序中用于分离组织、凝固、组织破坏或获得其他期望的组织作用。热、电外科和机械模态能组合在手术工具中。在第一模式中的可能损坏性的作用能通过使用第二模态最小化。在一个示例中，热止血因而能辅助电外科应用来避免与止血单极电外科波形相关的不利的组织作用，同时保留使用单极切割波形的有益效果。

Methods for treating asthma by damaging nerve tissue

A method for treating the lung during an acute episode of reversible chronic obstructive pulmonary disease such as an asthma attack. The method comprises transferring energy to an airway wall of an airway such that a diameter of the airway is increased. The energy may be transferred to the airway wall prior to, during or after an asthma attack. The energy may be transferred in an amount sufficient to temporarily or permanently increase the diameter of the airway. The method may be performed while the airway is open, closed or partially closed.

Determining tissue composition via an ultrasonic system

Various systems and methods for determining the composition of tissue via an ultrasonic surgical instrument are disclosed. A control circuit can be configured to monitor the change in resonant frequency of an ultrasonic electromechanical system of the ultrasonic surgical instrument as the ultrasonic blade oscillates against a tissue and determine the composition of the tissue accordingly. In some aspects, the control circuit can be configured to modify the operation of the ultrasonic electromechanical system or other operational parameters of the ultrasonic surgical instrument according to the detected tissue composition.

Modification of airways by application of energy

This relates to methods and devices for treating reversible chronic obstructive pulmonary disease, and more particularly, relates to a device for exchanging energy with airway tissue such as that found in the airways of human lungs. The exchange of energy with this airway tissue in the airways reduces the ability of the airways to constrict and/or reduces the resistance within the airway to the flow of air through the airway. This also relates to a method for decreasing responsiveness or decreasing resistance to airflow of airways involves the transfer of energy to or from the airway walls to prevent or reduce airway constriction and other symptoms of lung diseases. The treatment reduces the ability of the airways to contract during an acute narrowing of the airways, reduces mucus plugging of the airways, and/or increases the airway diameter. The methods according to the present invention provide a longer duration and/or more effective treatment for lung diseases than currently used drug treatments, and obviate patient compliance issues. This also includes additional steps that reduce the ability of the lung to produce at least one of the symptoms of reversible obstructive pulmonary disease and to reduce the resistance to the flow of air through a lung.

Device for dermatological treatment

A system for the treatment of targets under the skin of a patient comprising: a laser device for emitting a first series of laser pulses towards an area of the skin of a patient, where a target which must be reached by said laser pulses is located under said skin; a cooling system of said area of the skin by means of a cooling fluid; a first measurement sensor of a first temperature of said area of skin; a second measurement sensor of the temperature of said cooling fluid; said computer which receives the signals from said first and second temperature measurement sensor; said computer controls said laser device that emits a first series of laser pulses having predetermined power, duration and spacing; said temperature measurement sensor measures the temperature of said area of skin, following said first series of laser pulses; said computer calculates the predicted temperature reached of said area of the skin following the emission of a second series of pulses having said predetermined power, duration and spacing.

Systems and methods for controlling tissue ablation using multiple temperature sensing elements

Systems and associated methods place a temperature sensing element in an “edge region” between an energy transmitting electrode and a non-electrically conducting support body, where higher temperatures are likely to exist. Reliable temperature sensing, which is sensitive to variations in temperatures along the electrode, results.

Apparatus and method for venous ligation

A minimally-invasive surgery apparatus for causing the lumen of a vein to collapse to prevent blood flow through the vein, e.g., a varicose vein or a side branch of the saphenous vein, includes an electrode which is electrically connected to a power source, and the electrode is percutaneously advanced into the vein. Then, the power source is activated to energize the electrode and thus the blood vein until the blood vein sufficiently collapses to block the lumen of the vein. A feedback loop is also provided for sensing electrical impedance of the tissue within the vein being energized and for deenergizing the electrode when the impedance reaches a predetermined value.

SYSTEMS AND METHODS FOR THE ABLATION OF BODY FABRICS USING THE MAXIMUM TEMPERATURE FOR THE FABRIC.

LA INVENCION CONSISTE EN UNOS SISTEMAS Y METODOS PARA CORTAR TEJIDO CORPORAL USANDO UN ELECTRODO (16) PARA HACER CONTACTO CON EL TEJIDO EN UNA SUPERFICIE DE CONTACTO TEJIDO-ELECTRODO Y TRANSMITIR LA ENERGIA DE CORTE A UN NIVEL DE POTENCIA DETERMINABLE. LOS SISTEMAS Y METODOS INCLUYEN UN ELEMENTO (50) PARA RETIRAR EL CALOR DEL ELECTRODO (16) A UNA VELOCIDAD DETERMINADA. LOS SISTEMAS Y METODOS EMPLEAN UN ELEMENTO DE PROCESO (98) PARA INFERIR UNA CONDICION DE PREDICCION DE LA TEMPERATURA MAXIMA DEL TEJIDO QUE OCURRE POR DEBAJO DE LA SUPERFICIE DE CONTACTO TEJIDO-ELECTRODO. EL ELEMENTO DE PROCESO (98) CONTROLA EL NIVEL DE POTENCIA DE LA ENERGIA DE CORTE TRANSMITIDA POR EL ELECTRODO (16) O LA VELOCIDAD A LA QUE SE REFRIGERA EL ELECTRODO (16), O AMBOS, EN BASE AL MENOS EN PARTE EN LA PREDICCION DE LA TEMPERATURA. THE INVENTION CONSISTS OF SYSTEMS AND METHODS TO CUT BODY FABRIC USING AN ELECTRODE (16) TO MAKE CONTACT WITH THE FABRIC IN A FABRIC-ELECTRODE CONTACT SURFACE AND TRANSMIT THE CUTTING ENERGY TO A DETERMINABLE POWER LEVEL. THE SYSTEMS AND METHODS INCLUDE AN ELEMENT (50) TO REMOVE THE HEAT OF THE ELECTRODE (16) AT A CERTAIN SPEED. THE SYSTEMS AND METHODS EMPLOY A PROCESS ELEMENT (98) TO INFERATE A PREDICTION CONDITION OF THE MAXIMUM FABRIC TEMPERATURE THAT OCCURS BELOW THE FABRIC-ELECTRODE CONTACT SURFACE. THE PROCESS ELEMENT (98) CONTROLS THE POWER LEVEL OF THE CUTTING ENERGY TRANSMITTED BY THE ELECTRODE (16) OR THE SPEED TO WHICH THE ELECTRODE (16) COOLS, OR BOTH, BASED ON THE LEAST PART IN THE PREDICTION OF THE TEMPERATURE.

Device for dermatological treatment

一种用于治疗患者皮肤下的靶点的系统，包括：用于向患者皮肤区域发射第一系列激光脉冲的激光设备，这里，所述激光脉冲必须到达的靶点位于所述皮肤下；通过冷却流体针对所述皮肤区域的冷却系统；所述皮肤区域的第一温度的第一测量传感器；所述冷却流体的温度的第二测量传感器；从所述第一和第二温度测量传感器接收信号的所述计算机；所述计算机控制发射具有预定功率、持续时间和间隔的第一系列激光脉冲的所述激光设备；所述温度测量传感器在所述第一系列激光脉冲之后测量所述皮肤区域的温度；所述计算机计算在具有所述预定功率、持续时间和间隔的第二系列脉冲发射之后所述皮肤达到的预测温度。

Systems and methods for ablating body tissue using predicted maximum tissue temperature

This invention is systems and methods that ablate body tissue using an electrode (16) for contacting tissue at a tissue electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element (50) to remove heat from the electrode (16) at a determinable rate. The systems and methods employ a processing element (98) to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue electrode interface. The processing element (98) controls the power level of ablation energy transmitted by the electrode (16), or the rate at which the electrode (16) is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.

Methods for treating a lung

A method for treating the lung during an acute episode of reversible chronic obstructive pulmonary disease such as an asthma attack. The method comprises transferring energy to an airway wall of an airway such that a diameter of the airway is increased. The energy may be transferred to the airway wall prior to, during or after an asthma attack. The energy may be transferred in an amount sufficient to temporarily or permanently increase the diameter of the airway. The method may be performed while the airway is open, closed or partially closed.

Determining the state of an ultrasonic end effector

Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.

Methods for treating airways

This relates to treating an asthmatic lung and more particularly, relates to advancing a treatment device into the lung and treating the lung with the device. This also includes additional steps of treating the airway wall, applying energy or heat to the airway wall in an asthmatic lung.

Control systems and processes for energy applications to airway walls and other media

Determination process and predictive closed-loop control of dosimetry using measurement of skin surface temperature and associated methods

매질에 매립된 색소포를 타겟팅하기 위해 광열 타겟 치료 시스템 내에서 광원을 동작시키기 위한 적절한 한 세트의 파라미터들을 결정하기 위한 방법이 개시된다. 방법은, 치료 프로토콜의 시행 전에: 1) 미리 설정된 전력 레벨에서 광원으로부터의 적어도 하나의 레이저 펄스를 치료될 위치에 시행하는 단계 ― 미리 설정된 전력 레벨은 알려진 손상 임계치 미만임 ― ; 2) 적어도 하나의 레이저 펄스의 시행 다음에, 치료될 위치에서 피부 표면 온도를 측정하는 단계; 3) 광원을 동작시키기 위한 파라미터들과 피부 표면 온도 사이의 관계를 추정하는 단계; 및 4) 치료 프로토콜을 시행할 때, 색소포를 효과적으로 여전히 타겟팅하면서, 치료될 위치에서 매질에 대한 열 손상을 피하기 위해, 광원을 동작시키기 위한 파라미터들에 대한 안전한 동작 범위를 정의하는 단계를 포함한다. A method for determining an appropriate set of parameters for operating a light source within a photothermal target therapy system to target chromatophores embedded in a medium is disclosed. The method includes, prior to implementation of the treatment protocol: 1) applying at least one laser pulse from a light source at a preset power level to the location to be treated, wherein the preset power level is below a known damage threshold; 2) following the administration of at least one laser pulse, measuring the skin surface temperature at the location to be treated; 3) estimating the relationship between the parameters for operating the light source and the skin surface temperature; and 4) defining safe operating ranges for parameters for operating the light source to avoid thermal damage to the medium at the location to be treated, while effectively still targeting the chromatophores when implementing the treatment protocol. .

Nonlinear control system and method for thermal ablation of human tissue

(57)【要約】 人体組織を加熱するために電極１６にエネルギーを放射するシステム及びそれに関連する方法であって、そのシステム及び方法は、非線型的に、監視される操作状態の変化を考慮した調整を用いて、電極１６に対するエネルギーの適用を制御するものである。

Calculated using the energy density figure of thermoacoustics model

一种医学装置(300、400、500、600、700)包括用于加热对象(320)的目标区(324)的加热系统(304)以及用于控制(340)所述加热系统(304)的处理器，其中，使用热模型来对预定义体积中的能量密度进行建模(338)。所述医学装置(300、400、500、600、700)还包括含有机器可执行指令的存储器(336)，其中，对所述指令的执行令所述处理器(330)接收(100、200、342)处置规划，其中，对所述指令的执行还令所述处理器(330)重复地：通过使用所述处置规划来控制(340)所述加热系统(304)以在交替的加热周期和冷却周期期间加热(102、202、344)所述目标区(324)；并且使用所述处置规划和所述热模型来计算(104、204、346)预定义体积中的当前能量密度图(350)，其中，在对所述目标区(324)的加热期间重复地更新(348)所述当前能量密度。

System for controlling tissue ablation using temperature sensors

This invention is a system and associated method to ablate body tissue using multiple emitters (30) of ablating energy. The system and method convey ablating energy individually to each emitter (30) in a sequence of power pulses. The system and method periodically sense the temperature of each emitter (30) and compare the sensed temperatures to a desired temperature established for all emitters (30) to generate a signal individually for each emitter (30) based upon the comparison. The system and method individually vary the power pulse to each emitter (30) based upon the signal for that emitter to maintain the temperatures of all emitters essentially at the desired temperature during tissue ablation.

Inductively heated surgical tool

Oscillating electrical energy is delivered to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures. Thermal, electrosurgical and mechanical modalities may be combined in a surgical tool. Potentially damaging effects in a first modality may be minimized by using a secondary modality. In one example, thermal hemostasis may thus help electrosurgical applications avoid the adverse tissue effects associated with hemostatic monopolar electrosurgical waveforms while retaining the benefits of using monopolar incising waveforms.

Control system and process for application of energy to airway walls and other mediums

The present invention includes a system for delivering energy to an airway wall of a lung comprising an energy delivering apparatus and a PID controller having one or more variable gain factors which are rest after energy deliver has begun. The energy delivering apparatus may include a flexible elongated member and a distal expandable basket having at least one electrode for transferring energy to the airway wall and at least one temperature sensor for measuring temperature. The PID controller determines a new power set point base on an error between a preset temperature and the measured temperature. The algorithm can be Pi+1 = Pi + G(αei+βei-1+ηei-2) where α, β and η are preset values and α is from 1 to 2; β is from -1 to -2; and η is from -0.5 to 0-5. In another variation, the controller is configured to shut down if various measured parameters are exceeded such as, for example, energy, impedance, temperature, temperature differences, activation time and combinations thereof. Methods for treating a target medium using a PID algorithm are also provided.

Systems and methods for ablating body tissue using predicted maximum tissue temperature

This invention is systems and methods that ablate body tissue using an electrode (16) for contacting tissue at a tissue electrode interface to transmit ablation energy at a determinable power level. The systems and methods include an element (50) to remove heat from the electrode (16) at a determinable rate. The systems and methods employ a processing element (98) to derive a prediction of the maximum tissue temperature condition occurring beneath the tissue electrode interface. The processing element (98) controls the power level of ablation energy transmitted by the electrode (16), or the rate at which the electrode (16) is cooled, or both, based, at least in part, upon the maximum tissue temperature prediction.

Control system and process for application of energy to airway walls and other mediums

The present invention includes a system for delivering energy to an airway wall of a lung comprising an energy delivering apparatus and a PID controller having one or more variable gain factors which are rest after energy deliver has begun. The energy delivering apparatus may include a flexible elongated member and a distal expandable basket having at least one electrode for transferring energy to the airway wall and at least one temperature sensor for measuring temperature. The PID controller determines a new power set point base on an error between a preset temperature and the measured temperature. The algorithm can be Pi+1 = Pi + G(αe i + βe i-1 + γ e i-2 ) where α, β and γ are preset values and α is from 1 to 2; β is from -1 to -2; and γ is from -0.5 to 0-5. In another variation, the controller is configured to shut down if various measured parameters are exceeded such as, for example, energy, impedance, temperature, temperature differences, activation time and combinations thereof. Methods for treating a target medium using a PID algorithm are also provided.

Thermally adjustable surgical system and method

A power source delivers oscillating electrical energy to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.

CONTROL SYSTEM AND METHOD FOR ENERGY SUPPLY TO AIR WAYS OR OTHER MEDIA

Control system and process for application of energy to airway walls and other mediums

The present invention includes a system for delivering energy to an airway wall of a lung comprising an energy delivering apparatus and a PID controller having one or more variable gain factors which are rest after energy deliver has begun. The energy delivering apparatus may include a flexible elongated member and a distal expandable basket having at least one electrode for transferring energy to the airway wall and at least one temperature sensor for measuring temperature. The PID controller determines a new power set point base on an error between a preset temperature and the measured temperature. The algorithm can be Pi+1 = Pi + G(αei+βei-1+ηei-2) where α, β and η are preset values and α is from 1 to 2; β is from -1 to -2; and η is from -0.5 to 0-5. In another variation, the controller is configured to shut down if various measured parameters are exceeded such as, for example, energy, impedance, temperature, temperature differences, activation time and combinations thereof. Methods for treating a target medium using a PID algorithm are also provided.

Determining the state of an ultrasonic electromechanical system according to frequency shift

Various systems and methods for determining the state of an ultrasonic electromechanical system are disclosed. A control circuit can be configured to monitor the change in resonant frequency of an ultrasonic electromechanical system of the ultrasonic surgical instrument as the ultrasonic blade oscillates and determine the state or change in state of the ultrasonic electromechanical system accordingly. The change in state of the ultrasonic electromechanical system can include, for example, the change in temperature of the system. In some aspects, the control circuit can be configured to modify the operation of the ultrasonic electromechanical system or other operational parameters of the ultrasonic surgical instrument according to the state or change in state of the system.

Surgical laser system

A thulium fiber laser system can be used to treat tissues based on the ability for quick changes between laser pulses. For example, to treat stones in a tissue, a long pulse having low peak power can be used to create bubbles in front of the stone (calculi), then follow a series of shorter pulses and higher peak power can be used to break the stone. The sequence can be repeated to maintain large bubble formation, with the long pulse characteristics changed to accommodate for the changes in the tissue. A fluorescent sensing assembly can be used to detect the tissue conditions for selecting the conditions of the thulium fiber laser.

Systems and methods for sensing temperature within the body

Systems and methods well suited for use in catheter-based tissue ablation systems employ thermocouples for temperature sensing. The systems and methods combine accuracy with compact, low profile construction.

Melt system

本申请涉及一种消融系统，包括存储内腔网络的多个计算机断层成像(CT)图像的图像数据库以及，结合内窥镜和CT图像，使得能够把可定位导向装置与延伸的工作通道导航到感兴趣的点的导航系统。该系统还包括放成接近感兴趣的点的一个或多个基准标记器以及用于向感兴趣的点施加能量的经皮微波消融设备。利用本公开的上述实施例，提供了一种克服现有技术的缺点之一的消融系统。<pb pnum="1" />

Multi-mode surgical tool

Thermal, electrosurgical and mechanical modalities may be combined in a surgical tool. Potentially damaging effects in a first modality may be minimized by using a secondary modality. In one example, thermal hemostasis may thus help electrosurgical applications avoid the adverse tissue effects associated with hemostatic monopolar electrosurgical waveforms while retaining the benefits of using monopolar incising waveforms.

Systems and methods for tissue ablation and measurements relating to the same

An exemplary ablation system is provided. The system is designed for safe and efficacious energy delivery into tissue by, for example, emitting energy in a controlled, repeatable manner that allows for feedback and energy emission titration based on sensed parameters (e.g., tissue temperature) measured during ablation. The system may include a switching antenna for both heating of target tissue and radiometry to monitor the temperature of the heated tissue. For example, the switching antenna may include a monopole formed by proximal and distal radiating elements, such that the proximal radiating element includes a short to defeat a choke action of the proximal radiating element. The system further includes a processor for calculating the temperature of the target tissue and estimating volume of the ablation lesion based on the target tissue temperature.