VORRICHTUNG ZUR KNOCHEN-THERAPIE MITTELS ULTRASCHALL

Schallerzeuger zur Behandlung eines Lebewesens mit fokussierten Schallwellen.

SURGICAL ULTRASONIC DEVICE WITH TWO MODES OF OPERATION

System and method for controlling an ultrasonic tool

Systems (10) and methods (12) of controlling an ultrasonic surgical tool (20) with a console (22) are provided. A first drive signal (40) is applied to the ultrasonic surgical tool (20). A characteristic of a harmonic signal (44) resulting from application of the first drive signal (40) to the ultrasonic surgical tool (20) is acquired. A cancellation signal (70) is generated based on the characteristic of the harmonic signal (44). The first drive signal (40) and the cancellation signal (70) are combined to produce a second drive signal (80) that is sinusoidal. The second drive signal (80) is applied to the ultrasonic surgical tool (20) such that presence of the harmonic signal (44) resulting from application of the second drive signal (80) is reduced relative to presence of the harmonic signal (44) resulting from application of the first drive signal (40).

IMPROVED APPARATUS FOR ULTRASONIC THERAPEUTIC TREATMENT

The method and apparatus of the invention is directed to treating skeleto/muscular injuries or of diagnosing bone fractures and comprises applying to an external surface of the tissue a two component source of energy, each component having a different frequency in the range between 10 kHz and 4 MHz. This may be done by applying to an external surface of overlying tissue an application head and transmitting therethrough an ultrasonic wave comprising a low frequency carrier wave onto which is superimposed a high frequency transmission. Alternatively the method may comprise steps of applying to an external surface of the tissue an application head which comprises a first member capable of emitting energy at a comparatively low frequency, optionally in the region of between 10 and 110 kHz and applying also energy generated by a second piezo electric source at a frequency in the region of 0.5 to 3 MHz.

OPHTHALMIC SURGICAL CONTROL APPARATUS

An ophthalmic surgical control apparatus is configured to be connectable to a piezo handpiece for emulsifying an eye lens. The control apparatus includes a frequency generator having a first and a second frequency module. The first frequency module generates a first oscillation signal having a first frequency lower than the ultrasonic resonant frequency of the piezo handpiece. The second frequency module generates a second oscillation signal having a second frequency greater than the ultrasonic resonant frequency of the piezo handpiece. A frequency generator control module controls the first and the second frequency modules.

Ultrasonic device generating signals for limiting or reducing the growth of pathological tissue

DEVICE FOR THE BONE THERAPY OF MEANS ULTRASONIC

Ultrasonic instrument for surgical applications

DUAL MODE ULTRASONIC SURGICAL APPARATUS

A single ultrasonic surgical apparatus (10) can provide a substantial cutting effect on tissue, a substantial coagulation effect on tissue, and an appropriate blend of simultaneous cutting and coagulation effects on tissue. The ultrasonic surgical apparatus (10) is comprised of a handpiece (11) which incorporates a transducer (14) and a surgical tool (16), a source of electrical energy (17), a controller (18), and a switch (19). The apparatus may be operated at two frequencies within the ultrasonic spectrum, where the first frequency (22) is selected at the low end of the spectrum for enhanced tissue cutting performance, and the second frequency (23) is approximately three times higher for enhanced tissue coagulation performance. The two frequencies may be operated selectively or concurrently, and may be independently adjustable as to amplitude. The transducer (14) may be composed of magnetostrictive or piezoelectric elements (20 or 21). The surgeon to set the desired amplitude of the mechanical ...

Improved apparatus for ultrasonic therapeutic treatment

Improved apparatus for ultrasonic therapeutic treatment

Ultrasonic surgical instrument with modulator

OPHTHALMO-SURGICAL CONTROL DEVICE

The invention relates to an ophthalmo-surgical control device having a frequency generator, wherein the frequency generator has: - a first frequency module, which is configured to generate a first oscillation signal with a first frequency, wherein the first frequency is lower than an ultrasonic resonance frequency of an ophthalmo-surgical piezo handpiece attachable to the control device for emulsification of an eye lens, and - a second frequency module which is configured to generate a second oscillation signal with a second frequency, wherein the second frequency is higher than the ultrasonic resonance frequency of the ophthalmo-surgical piezo handpiece attachable to the control device, and wherein the control device has a frequency generator control module for controlling the first frequency module and the second frequency module.

Multiple frequency phacoemulsification needle driver

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

Improved ultrasonic knife

Disclosed is an improved ultrasonic knife of the type for surgical incision in various types of tissue and/or for the removal of cement within the body. The knife has a reduced thermal footprint to minimize thermally induced tissue damage. Tooth configuration on the knife cooperates with the stroke of the ultrasonic drive to produce efficient cutting, as well as tactile feedback to the surgeon with respect to the rate of cutting, and changes in tissue density. Ultrasonic knife tip extenders are also disclosed for advancing the ultrasonic knife tip through the working channel of an endoscope. Methods utilizing the foregoing apparatus are also disclosed.

GENERATOR FOR DIGITALLY GENERATING COMBINED ELECTRICAL SIGNAL WAVEFORMS FOR ULTRASONIC SURGICAL INSTRUMENTS

Disclosed is a method of generating electrical signal waveforms by a generator. The method includes storing phase points of first and second digital electrical signal waveforms in first and second lookup tables. The first and second digital electrical signal waveforms are represented by a predetermined number of phase points that define wave shapes. At each clock cycle, a digital synthesis circuit retrieves phase points from the first and second lookup tables and the digital processing circuit combines phase points from the first and second lookup tables. A digital-to-analog converter (DAC) circuit converts the combined phase point into an analog signal. The analog signal is configured to drive a first and second ultrasonic transducer.

CIRCUITS FOR SUPPLYING ISOLATED DIRECT CURRENT (DC) VOLTAGE TO SURGICAL INSTRUMENTS

Provided is an apparatus, system, and method for managing radio frequency (RF) and ultrasonic signals output by a generator that includes a surgical instrument comprising an RF energy output and an ultrasonic energy output and a circuit configured to receive a combined RF and ultrasonic signal from the generator. The circuit may be configured to isolate a direct current (DC) voltage from the combined RF and ultrasonic signal. The DC voltage may then be used to power various electrical components of the surgical instrument while still providing RF energy and ultrasonic energy for surgical application.

Sound generator for treating a living being with focused sound waves

The sound generator comprises an electrically activated sound source (2), focusing means (5) for the sound waves emerging from the sound source (2), and an electrical generator apparatus (9) activating the sound source (2). The generator apparatus (9) comprises at least two generators (10, 11) to which the sound source (2) can be connected via switching means (12) and which activate the sound source (2) for generation of different sound waves, for example shock waves and continuous sound. ...

Dual mode ultrasonic surgical apparatus

SYSTEM AND METHOD FOR CONTROLLING AN ULTRASONIC TOOL

Systems (10) and methods (12) of controlling an ultrasonic surgical tool (20) with a console (22) are provided. A first drive signal (40) is applied to the ultrasonic surgical tool (20). A characteristic of a harmonic signal (44) resulting from application of the first drive signal (40) to the ultrasonic surgical tool (20) is acquired. A cancellation signal (70) is generated based on the characteristic of the harmonic signal (44). The first drive signal (40) and the cancellation signal (70) are combined to produce a second drive signal (80) that is sinusoidal. The second drive signal (80) is applied to the ultrasonic surgical tool (20) such that presence of the harmonic signal (44) resulting from application of the second drive signal (80) is reduced relative to presence of the harmonic signal (44) resulting from application of the first drive signal (40).

SYSTEM AND METHOD FOR IMPROVED START-UP OF SELF-OSCILLATING ELECTRO-MECHANICAL SURGICAL DEVICES

An oscillating circuit for determining a resonant frequency of an electro-mechanical oscillating device and for driving the electro-mechanical oscillating device at the determined resonant frequency includes a driving circuit and a start-up, impetus injection circuit. The driving circuit is configured to receive one or more reference signals and further configured to provide a driving signal related to the reference signals to the electro-mechanical oscillating device. The start-up, impetus injection circuit is operably coupled to the electro-mechanical oscillating device and configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device. The start-up, impetus injection circuit is activated upon start-up of the oscillating circuit to drive the electro-mechanical oscillation device and the driving circuit determines a resonant frequency by measuring a parameter related to the resonant frequency of the electro-mechanical oscillating device.

ULTRASONIC INSTRUMENT FOR SURGICAL APPLICATIONS

An improved surgical instrument is described wherein, an ultrasonic stack includes one or more piezoelectric sections surrounded by at least first resonator section and a second resonator section. The excitation signal for the ultrasonic stack is adapted to provide power at a first and a second frequency in order to drive thesurgical tip of the instrument at a first frequency and second frequency simultaneously.

High frequency generator intended for the projector supply of ultrasounds of therapeutic use

ULTRASONIC GENERATOR SYSTEMS AND METHODS

Embodiments shown and described herein relate, in general, to systems and methods for driving ultrasonic transducers and, more particularly, to systems and methods for controlling the output of high power ultrasonic transducers and improving performance of ultrasonic systems.

Ophthalmosurgical control device for use in ophthalmosurgical system, comprises frequency generator, where frequency generator includes frequency module arranged to generate oscillation signal with frequency

The ophthalmosurgical control device (1) comprises a frequency generator (2), where the frequency generator includes a frequency module (3) arranged to generate an oscillation signal with a frequency (f1). The generated frequency is lower than an ultrasonic resonance frequency of an ophthalmosurgical piezoelectric device. Another frequency module (4) is arranged to generate another oscillation signal with another frequency (f2). A frequency generator control module (5) is provided for driving the former frequency module and latter frequency module.

CHIRURGISCHE ULTRASCHALLVORRICHTUNG MIT ZWEI BETRIEBSARTEN

Vorrichtung und Verfahren zum Betrieb eines ultraschallgetriebenen Werkzeugs

Die Erfindung betrifft ein Verfahren zum Betrieb eines Ultraschallsystems (2) eines zahnärztlichen Instruments, wobei das Ultraschallsystem (2) ein Bearbeitungswerkzeug (2.1) und einen piezoelektrischen oder magnetostriktiven Antrieb (2.2) umfasst und von dem Antrieb (2.2) mit einer Resonanzfrequenz (R1-R6) des Ultraschallsystems (2) angeregt wird und wobei die über das Ultraschallsystem (2) abgegebene Leistung veränderbar ist. Der Antrieb (2.2) wird mit wenigstens einer weiteren Resonanzfrequenz (R1-R6) einer anderen Ordnung des Ultraschallsystems (2) gezielt angeregt. Des Weiteren betrifft die Erfindung ein zahnärztliches Instrument (1) mit einem Ultraschallsystem (2) zur Behandlung eines Patienten. Das Ultraschallsystem (2) umfasst einen piezoelektrischen oder magnetostriktiven Antrieb (2.2) und ein Bearbeitungswerkzeug (2.1) und wird durch den Antrieb (2.2) angeregt, wobei eine Antriebselektronik (4) zur Steuerung des Antriebs (2.2) vorgesehen ist. Es ist eine Auswahleinrichtung (3) ...

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

System And Method For Controlling An Ultrasonic Tool

Systems () and methods () of controlling an ultrasonic surgical tool () with a console () are provided. A first drive signal () is applied to the ultrasonic surgical tool (). A characteristic of a harmonic signal () resulting from application of the first drive signal () to the ultrasonic surgical tool () is acquired. A cancellation signal () is generated based on the characteristic of the harmonic signal (). The first drive signal () and the cancellation signal () are combined to produce a second drive signal () that is sinusoidal. The second drive signal () is applied to the ultrasonic surgical tool () such that presence of the harmonic signal () resulting from application of the second drive signal () is reduced relative to presence of the harmonic signal () resulting from application of the first drive signal (). 1122044{'b': 20', '40, 'driving the ultrasonic surgical tool () with a first drive signal ();'}{'b': 44', '20', '40, 'acquiring a characteristic of the harmonic signal () resulting from driving the ultrasonic surgical tool () with the first drive signal ();'}{'b': 70', '44, 'generating a cancellation signal () based on the acquired characteristic of the harmonic signal ();'}{'b': 40', '70', '80', '80, 'combining the first drive signal () and the cancellation signal () to produce a second drive signal (), the second drive signal () being sinusoidal; and'}{'b': 20', '80', '44', '20', '80', '44', '20', '40, 'driving the ultrasonic surgical tool () with the second drive signal () such that presence of the harmonic signal () resulting from driving the ultrasonic surgical tool () with the second drive signal () is reduced relative to presence of the harmonic signal () resulting from driving the ultrasonic surgical tool () with the first drive signal ().'}. A method () of controlling an ultrasonic surgical tool () to reduce presence of a harmonic signal (), the method comprising: The present application is a continuation of U.S. patent application Ser. No. 17/ ...

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi- tap transformer may be provided.

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

IMPROVED APPARATUS FOR ULTRASONIC THERAPEUTIC TREATMENT

The method and apparatus of the invention is directed to treating skeleto/muscular injuries or of diagnosing bone fractures and comprises applying to an external surface of the tissue a two component source of energy, each component having a different frequency in the range between 10 kHz and 4 MHz. This may be done by applying to an external surface of overlying tissue an application head and transmitting therethrough an ultrasonic wave comprising a low frequency carrier wave onto which is superimposed a high frequency transmission. Alternatively the method may comprise steps of applying to an external surface of the tissue an application head which comprises a first member capable of emitting energy at a comparatively low frequency, optionally in the region of between 10 and 110 kHz and applying also energy generated by a second piezo electric source at a frequency in the region of 0.5 to 3 MHz.

Method and apparatus for selecting operations of a surgical instrument based on user intention

Disclosed is a method for operating a surgical instrument, the surgical instrument comprising a radio frequency (RF) energy output, an ultrasonic energy output, and a first jaw and a second jaw configured for pivotal movement between a closed position and an open position, the method comprising: receiving a first input indicating a user selection of one of a first option and a second option; receiving a second input indicating whether the first jaw and the second jaw are in the closed position or in the open position; receiving a third input indicating electrical impedance at the RF energy output; and selecting a mode of operation for treating a tissue from a plurality of modes of operation based at least in part on the first input, the second input and the third input.

System and method for improved start-up of self-oscillating electro-mechanical surgical devices

SYSTEM AND METHOD FOR IMPROVED START-UP OF SELF-OSCILLATING ELECTRO-MECHANICAL SURGICAL DEVICES An oscillating circuit (200) for determining a resonant frequency of an electro mechanical oscillating device (230) and for driving the electro-mechanical oscillating device at the determined resonant frequency includes a driving circuit and a start-up, impetus injection circuit (270). The driving circuit is configured to receive one or more reference signals and further configured to provide a driving signal related to the reference signals to the electro mechanical oscillating device. The start-up, impetus injection circuit (270) is operably coupled to the electro-mechanical oscillating device (230) and configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device (230). The start-up, impetus injection circuit (270) is activated upon start-up of the oscillating circuit (200) to drive the electro-mechanical oscillation device (230) and the driving ...

ULTRASONIC SURGICAL INSTRUMENT WITH MODULATOR

A surgical instrument includes a transducer (14) configured to produce vibrations along a longitudinal axis at a predetermined frequency. An end effector (50) is adapted to couple to the transducer and extends along the longitudinal axis. The end effector includes a body having a proximal end and a distal end. The distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. A drive module (600) is coupled to the transducer to generate a modulated drive signal. The distal end of the end effector is movable in response to the vibrations produced by the transducer in response to the modulated drive signal.

ENERGY GENERATOR WITH MULTIFUNCTIONAL ENERGY RECEPTACLE

ULTRASONIC INSTRUMENT FOR SURGICAL APPLICATIONS

An improved surgical instrument is described wherein, an ultrasonic stack includes one or more piezoelectric sections surrounded by at least first resonator section and a second resonator section. The excitation signal for the ultrasonic stack is adapted to provide power at a first and a second frequency in order to drive the surgical tip of the instrument at a first frequency and second frequency simultaneously.

Subcutaneous neural stimulation or local tissue destruction

A method of generating a high energy density at any point in the body, noninvasively, by two high frequency sonic beams creating a low frequency beating pattern at their intersection locus. One method provides for two transducers at different angular positions. Each transducer produces a beam pattern of high frequency. One transducer produces a high frequency which is higher by a predetermined quantity than the other. At their point of intersection, the sonic oscillations add and subtract, producing a low frequency beat equal to the predetermined quantity. This high energy low frequency beat can be used to stimulate neural points in the skull or other parts of the body or for tissue destruction. In a related method, the high frequency beams are set in axial alignment so that the frequency generating output is fixed between the transducers. A master modulator can then be used to electronically vary the position of the intersecting locus along the axial line connecting the transducers.

DUAL MODE ULTRASONIC SURGICAL APPARATUS

A single ultrasonic surgical apparatus (10) can provide a substantial cutting effect on tissue, a substantial coagulation effect on tissue, and an appropriate blend of simultaneous cutting and coagulation effects on tissue. The ultrasonic surgical apparatus (10) is comprised of a handpiece (11) which incorporates a transducer (14) and a surgical tool (16), a source of electrical energy (17), a controller (18), and a switch (19). The apparatus may be operated at two frequencies within the ultrasonic spectrum, where the first frequency (22) is selected at the low end of the spectrum for enhanced tissue cutting performance, and the second frequency (23) is approximately three times higher for enhanced tissue coagulation performance. The two frequencies may be operated selectively or concurrently, and may be independently adjustable as to amplitude. The transducer (14) may be composed of magnetostrictive or piezoelectric elements (20 or 21). The surgeon to set the desired amplitude of the mechanical ...

System and method for controlling an ultrasonic tool

Disclosed herein is a console for controlling an ultrasonic surgical tool to reduce presence of a ) harmonic signal, the console comprising: a controller configured to: drive the ultrasonic surgical tool with a first drive signal; acquire characteristics of the harmonic signal in the ultrasonic surgical tool resulting from driving the ultrasonic surgical tool with the first drive signal; generate a cancellation signal based on the acquired characteristics of the harmonic signal; combine the cancellation signal with the first drive signal to produce a second drive signal; drive the ultrasonic surgical tool with the second drive signal; compare the presence of the harmonic signal within a current of the ultrasonic surgical tool resulting from driving the ultrasonic surgical tool with the second drive signal to a predetermined threshold; and based on the comparison, generate and drive the ultrasonic surgical tool with a third drive signal that reduces the presence of the harmonic signal within ...

System and method for improved start-up of self-oscillating electro-mechanical surgical devices

SYSTEM AND METHOD FOR IMPROVED START-UP OF SELF-OSCILLATING ELECTRO-MECHANICAL SURGICAL DEVICES An oscillating circuit (200) for determining a resonant frequency of an electro mechanical oscillating device (230) and for driving the electro-mechanical oscillating device at the determined resonant frequency includes a driving circuit and a start-up, impetus injection circuit (270). The driving circuit is configured to receive one or more reference signals and further configured to provide a driving signal related to the reference signals to the electro mechanical oscillating device. The start-up, impetus injection circuit (270) is operably coupled to the electro-mechanical oscillating device (230) and configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device (230). The start-up, impetus injection circuit (270) is activated upon start-up of the oscillating circuit (200) to drive the electro-mechanical oscillation device (230) and the driving ...

Ultrasonic bone therapy apparatus and method

Improved apparatus for ultrasonic therapeutic trteatment

System and method for controlling an ultrasonic tool

Systems (10) and methods (12) of controlling an ultrasonic surgical tool (20) with a console (22) are provided. A first drive signal (40) is applied to the ultrasonic surgical tool (20). A characteristic of a harmonic signal (44) resulting from application of the first drive signal (40) to the ultrasonic surgical tool (20) is acquired. A cancellation signal (70) is generated based on the characteristic of the harmonic signal (44). The first drive signal (40) and the cancellation signal (70) are combined to produce a second drive signal (80) that is sinusoidal. The second drive signal (80) is applied to the ultrasonic surgical tool (20) such that presence of the harmonic signal (44) resulting from application of the second drive signal (80) is reduced relative to presence of the harmonic signal (44) resulting from application of the first drive signal (40).

Multiple frequency phacoemulsification needle driver

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

SYSTEM AND METHOD FOR CONTROLLING AN ULTRASONIC TOOL

Systems () and methods () of controlling an ultrasonic surgical tool () with a console () are provided. A first drive signal () is applied to the ultrasonic surgical tool (). A characteristic of a harmonic signal () resulting from application of the first drive signal () to the ultrasonic surgical tool () is acquired. A cancellation signal () is generated based on the characteristic of the harmonic signal (). The first drive signal () and the cancellation signal () are combined to produce a second drive signal () that is sinusoidal. The second drive signal () is applied to the ultrasonic surgical tool () such that presence of the harmonic signal () resulting from application of the second drive signal () is reduced relative to presence of the harmonic signal () resulting from application of the first drive signal (). 1. (canceled)2. A console for controlling an ultrasonic surgical tool to reduce presence of a harmonic signal , the console comprising: drive the ultrasonic surgical tool with a first drive signal;', 'acquire characteristics of the harmonic signal in the ultrasonic surgical tool resulting from driving the ultrasonic surgical tool with the first drive signal;', 'generate a cancellation signal based on the acquired characteristics of the harmonic signal;', 'combine the cancellation signal with the first drive signal to produce a second drive signal;', 'drive the ultrasonic surgical tool with the second drive signal;', 'compare the presence of the harmonic signal within a current of the ultrasonic surgical tool resulting from driving the ultrasonic surgical tool with the second drive signal to a predetermined threshold; and', 'based on the comparison, generate and drive the ultrasonic surgical tool with a third drive signal that reduces the presence of the harmonic signal within the current of the ultrasonic surgical tool relative to the presence of the harmonic signal within the current of the ultrasonic surgical tool resulting from driving the ultrasonic ...

CHIRURGISCHE ULTRASCHALLVORRICHTUNG MIT ZWEI BETRIEBSARTEN

Apparatus for preparing soft tissue grafts

A tissue splitting device for splitting a harvested soft tissue to provide a layer of tissue having a uniform thickness and methods for tissue transplantation using uniform layers of tissue.

Multiple frequency phacoemulsification needle driver

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

Methods for operating generator for digitally generating electrical signal waveforms and surgical instruments

Disclosed is a method of generating electrical signal waveforms by a generator. The generator includes a processor and a memory in communication with the processor. The memory defines a first and second table. The processor retrieves information from the first table defined in the memory, where the information is associated with a first wave shape of a first electrical signal waveform for performing a surgical procedure. The processor retrieves information from the second table defined in the memory, where the information is associated with a second wave shape of a second electrical signal waveform for performing a surgical procedure. The processor combines the first and second wave shapes to create a combined wave shape of an electrical signal waveform for performing a surgical procedure and the combined wave shape electrical signal waveform for performing a surgical procedure is delivered to a surgical instrument.

Multiple frequency phacoemulsification needle driver

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

ULTRASONIC SURGICAL INSTRUMENT WITH MODULATOR

A surgical instrument includes a transducer (14) configured to produce vibrations along a longitudinal axis at a predetermined frequency. An end effector (50) is adapted to couple to the transducer and extends along the longitudinal axis. The end effector includes a body having a proximal end and a distal end. The distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. A drive module (600) is coupled to the transducer to generate a modulated drive signal. The distal end of the end effector is movable in response to the vibrations produced by the transducer in response to the modulated drive signal.

System and Method for Improved Start-Up of Self-Oscillating Electro-Mechanical Surgical Devices

An oscillating circuit for determining a resonant frequency of an electro-mechanical oscillating device and for driving the electro-mechanical oscillating device at the determined resonant frequency includes a driving circuit and a start-up, impetus injection circuit. The driving circuit is configured to receive one or more reference signals and further configured to provide a driving signal related to the reference signals to the electro-mechanical oscillating device. The start-up, impetus injection circuit is operably coupled to the electro-mechanical oscillating device and configured to selectively provide a start-up excitation signal to the electro-mechanical oscillation device. The start-up, impetus injection circuit is activated upon start-up of the oscillating circuit to drive the electro-mechanical oscillation device and the driving circuit determines a resonant frequency by measuring a parameter related to the resonant frequency of the electro-mechanical oscillating device.

Ultrasonic surgical tool capable of vibrating in plural modes and a drive system that induces non-linear vibrations in the tool tip

An ultrasonic surgical tool system with a tip capable of simultaneously vibrating in plural modes. The system includes a console capable of supplying a drive signal to the tip that includes plural components. Each component has a frequency characteristic that is based in part on the equivalent of current through the mechanical components of the tip. The frequency components are different from each other. Based on the application of drive signal the tip undergoes non-linear vibrations.

ULTRASONIC PROBE

A method of treating a calculi mass can include using an ultrasonic probe to produce acoustic energy and fragment the mass. The method can include varying the frequency at which fragmentation occurs to treat the mass with a resonant frequency. The ultrasonic probe can have a distal tip for contact with the mass, where the tip has a morphology for concentrating stress on the mass. The ultrasonic probe can have two or more ultrasonic horns to allow for higher voltage and power levels.

Methods for driving an ultrasonic surgical instrument with modulator

Methods for driving a surgical instrument are disclosed. The surgical instrument includes a transducer configured to produce vibrations along a longitudinal axis at a predetermined frequency. An end effector is adapted to couple to the transducer and extends along the longitudinal axis. The end effector includes a body having a proximal end and a distal end. The distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. A drive module is coupled to the transducer to generate a modulated drive signal. The distal end of the end effector is movable in response to the vibrations produced by the transducer in response to the modulated drive signal.

Ultrasonic instrument for surgical applications

Ultrasonic probe for calculi treatment

A method of treating a calculi mass can include using an ultrasonic probe to produce acoustic energy and fragment the mass. The method can include varying the frequency at which fragmentation occurs to treat the mass with a resonant frequency. The ultrasonic probe can have a distal tip for contact with the mass, where the tip has a morphology for concentrating stress on the mass. The ultrasonic probe can have two or more ultrasonic horns to allow for higher voltage and power levels.

Ultrasonic instrument for surgical applications

An improved surgical instrument is described wherein, an ultrasonic stack includes one or more piezoelectric sections surrounded by at least first resonator section and a second resonator section. The excitation signal for the ultrasonic stack is adapted to provide power at a first and a second frequency in order to drive the surgical tip of the instrument at a first frequency and second frequency simultaneously. ...

GENERATOR FOR DIGITALLY GENERATING ELECTRICAL SIGNAL WAVEFORMS FOR ELECTROSURGICAL AND ULTRASONIC SURGICAL INSTRUMENTS

Disclosed is a method of generating electrical signal waveforms by a generator. The generator includes a digital processing circuit, a memory circuit in communication with the digital processing circuit, the memory circuit defining a lookup table, a digital synthesis circuit in communication with the digital processing circuit and the memory circuit, and a digital-to-analog converter (DAC) circuit. The method includes storing, by the digital processing circuit, phase points of a digital electrical signal waveform in the lookup table defined by the memory circuit, wherein the digital electrical signal waveform is represented by a predetermined number of phase points, wherein the predetermined number phase points define a predetermined wave shape. Receiving a clock signal by the digital synthesis circuit. Retrieving, by the digital processing circuit, a phase point from the lookup table. Converting, by the digital processing circuit, the retrieved phase point to an analog signal.

OPHTHALMO-SURGICAL CONTROL DEVICE

Ultrasonic knife

Disclosed is an improved ultrasonic knife of the type for surgical incision in various types of tissue and/or for the removal of cement within the body. The knife has a reduced thermal footprint to minimize thermally induced tissue damage. Tooth configuration on the knife cooperates with the stroke of the ultrasonic drive to produce efficient cutting, as well as tactile feedback to the surgeon with respect to the rate of cutting, and changes in tissue density. Ultrasonic knife tip extenders are also disclosed for advancing the ultrasonic knife tip through the working channel of an endoscope. Methods utilizing the foregoing apparatus are also disclosed.

Ultrasonic device generating signals for limiting or reducing the growth of pathological tissue

Device and method for operating an ultrasonic driven tool

Die Erfindung betrifft ein Verfahren zum Betrieb eines Ultraschallsystems (2) eines zahnärztlichen Instruments, wobei das Ultraschallsystem (2) ein Bearbeitungswerkzeug (2.1) und einen piezoelektrischen oder magnetostriktiven Antrieb (2.2) umfasst und von dem Antrieb (2.2) mit einer Resonanzfrequenz (R1-R6) des Ultraschallsystems (2) angeregt wird und wobei die über das Ultraschallsystem (2) abgegebene Leistung veränderbar ist. Der Antrieb (2.2) wird mit wenigstens einer weiteren Resonanzfrequenz (R1-R6) einer anderen Ordnung des Ultraschallsystems (2) gezielt angeregt. Des Weiteren betrifft die Erfindung ein zahnärztliches Instrument (1) mit einem Ultraschallsystem (2) zur Behandlung eines Patienten. Das Ultraschallsystem (2) umfasst einen piezoelektrischen oder magnetostriktiven Antrieb (2.2) und ein Bearbeitungswerkzeug (2.1) und wird durch den Antrieb (2.2) angeregt, wobei eine Antriebselektronik (4) zur Steuerung des Antriebs (2.2) vorgesehen ist. Es ist eine Auswahleinrichtung (3) ...

Improved apparatus for ultrasonic therapeutic treatment

VORRICHTUNG ZUR ERZEUGUNG VON DAS WACHSTUM PATHOLOGISCHEN GEWEBES ODER DERGLEICHEN EINSCHRAENKENDEN BZW. UNTERBINDENDEN BZW. RUECKBILDENDEN ULTRASCHALLSIGNALFORMEN FUER EINE ULTRASCHALLSENDEANORDNUNG

Ultrasonic surgical instrument with modulator

A surgical instrument includes a transducer (14) configured to produce vibrations along a longitudinal axis at a predetermined frequency. An end effector (50) is adapted to couple to the transducer and extends along the longitudinal axis. The end effector includes a body having a proximal end and a distal end. The distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. A drive module (600) is coupled to the transducer to generate a modulated drive signal. The distal end of the end effector is movable in response to the vibrations produced by the transducer in response to the modulated drive signal.

PROTECTION TECHNIQUES FOR GENERATOR FOR DIGITALLY GENERATING ELECTROSURGICAL AND ULTRASONIC ELECTRICAL SIGNAL WAVEFORMS

A method of generating electrical signal waveforms. A generator includes a digital processing circuit, a memory circuit in communication with the digital processing circuit defining a lookup table, a digital synthesis circuit in communication with the digital processing circuit and the memory circuit, and a digital-to-analog converter (DAC) circuit. The method includes generating a first and second digital electrical signal waveforms, combining the first and second waveforms to form a combined waveform, modifying the combined waveform to form a modified waveform The peak amplitude of the modified waveform does not exceed a predetermined amplitude value. The method includes generating a second waveform that is a function of the first waveform. The method includes modifying a frequency of the first waveform to form a frequency modified first waveform and combining the frequency modified first and second waveforms to form a combined waveform. 1. A method of generating electrical signal waveforms by a generator , the generator comprising a digital processing circuit , a memory circuit in communication with the digital processing circuit , a digital synthesis circuit in communication with the digital processing circuit and the memory circuit , and a digital-to-analog converter (DAC) circuit , the memory circuit defining first and second lookup tables , the method comprising:storing, by the digital processing circuit, phase points of a first digital electrical signal waveform in a first lookup table defined by the memory circuit, wherein the first digital electrical signal waveform is represented by a first predetermined number of phase points, wherein the first predetermined number of phase points define a first predetermined wave shape;storing, by the digital processing circuit, phase points of a second digital electrical signal waveform in a second lookup table defined by the memory circuit, wherein the second digital electrical signal waveform is represented by a ...

Circuits for supplying isolated direct current (DC) voltage to surgical instruments

Provided is an apparatus, system, and method for managing radio frequency (RF) and ultrasonic signals output by a generator that includes a surgical instrument comprising an RF energy output and an ultrasonic energy output and a circuit configured to receive a combined RF and ultrasonic signal from the generator. The circuit may be configured to isolate a direct current (DC) voltage from the combined RF and ultrasonic signal. The DC voltage may then be used to power various electrical components of the surgical instrument while still providing RF energy and ultrasonic energy for surgical application.

Ultrasonic treatment method and apparatus with active pain suppression

An ultrasonic medical treatment device has a probe, a transducer for mechanically vibrating the probe at an ultrasonic frequency, a voltage source for energizing the transducer, and another electrical voltage source for feeding to the probe a high-frequency alternating waveform of limited current and limited voltage to be conducted into a patient through the operative tip of the probe after placement of the operative tip into contact with the patient. The alternating waveform has a current and a voltage so limited as to prevent damage to organic tissues while stimulating nerves to reduce or suppress pain.

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

Ultrasonic knife

Disclosed is an improved ultrasonic knife of a type for incising various types of material. The knife has a reduced thermal footprint to tailor thermally induced tissue effects. Tooth configuration on the knife cooperates with the stroke of the ultrasonic drive to produce efficient cutting, as well as tactile feedback to the surgeon with respect to the rate of cutting, and changes in tissue density. Ultrasonic knife tip extenders are also disclosed for advancing the ultrasonic knife tip through the working channel of an endoscope or trocar sheath. Methods utilizing the foregoing apparatus are also disclosed.

Ultrasonic surgical instrument with modulator

A surgical instrument includes a transducer configured to produce vibrations along a longitudinal axis at a predetermined frequency. An end effector is adapted to couple to the transducer and extends along the longitudinal axis. The end effector includes a body having a proximal end and a distal end. The distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. A drive module is coupled to the transducer to generate a modulated drive signal. The distal end of the end effector is movable in response to the vibrations produced by the transducer in response to the modulated drive signal.

ULTRASONIC SURGICAL INSTRUMENT WITH MODULATOR

DUAL MODE ULTRASONIC SURGICAL APPARATUS

A single ultrasonic surgical apparatus (10) can provide a substantial cutting effect on tissue, a substantial coagulation effect on tissue, and an appropriate blend of simultaneous cutting and coagulation effects on tissue. The ultrasonic surgical apparatus (10) is comprised of a handpiece (11) which incorporates a transducer (14) and a surgical tool (16), a source of electrical energy (17), a controller (18), and a switch (19). The apparatus may be operated at two frequencies within the ultrasonic spectrum, where the first frequency (22) is selected at the low end of the spectrum for enhanced tissue cutting performance, and the second frequency (23) is approximately three times higher for enhanced tissue coagulation performance. The two frequencies may be operated selectively or concurrently, and may be independently adjustable as to amplitude. The transducer (14) may be composed of magnetostrictive or piezoelectric elements (20 or 21). The surgeon to set the desired amplitude of the mechanical ...

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

Improved ultrasonic knife

Disclosed is an improved ultrasonic knife of the type for surgical incision in various types of tissue and/or for the removal of cement within the body. The knife has a reduced thermal footprint to minimize thermally induced tissue damage. Tooth configuration on the knife cooperates with the stroke of the ultrasonic drive to produce efficient cutting, as well as tactile feedback to the surgeon with respect to the rate of cutting, and changes in tissue density. Ultrasonic knife tip extenders are also disclosed for advancing the ultrasonic knife tip through the working channel of an endoscope. Methods utilizing the foregoing apparatus are also disclosed.

Vorrichtung und Verfahren zum Betrieb eines ultraschallgetriebenen Werkzeugs

Verfahren zum Betrieb eines Ultraschallsystems (2) eines zahnärztlichen Instruments, wobei das Ultraschallsystem (2) ein Bearbeitungswerkzeug (2.1) und einen piezoelektrischen oder magnetostriktiven Antrieb (2.2) umfasst und von dem Antrieb (2.2) mit einer Resonanzfrequenz des Ultraschallsystems (2) angeregt wird und wobei die über das Ultraschallsystem (2) abgegebene Leistung veränderbar ist, dadurch gekennzeichnet, dass der Antrieb (2.2) mit wenigstens einer weiteren Resonanzfrequenz (R1-R6) einer anderen Ordnung des Ultraschallsystems (2) gezielt angeregt wird.

Ultrasonic generator systems and methods

Embodiments shown and described herein relate, in general, to systems and methods for driving ultrasonic transducers and, more particularly, to systems and methods for controlling the output of high power ultrasonic transducers and improving performance of ultrasonic systems.

VORRICHTUNG ZUR KNOCHEN-THERAPIE MITTELS ULTRASCHALL

Ultrasonic knife

Disclosed is an improved ultrasonic knife of a type for incising various types of material. The knife has a reduced thermal footprint to tailor thermally induced tissue effects. Tooth configuration on the knife cooperates with the stroke of the ultrasonic drive to produce efficient cutting, as well as tactile feedback to the surgeon with respect to the rate of cutting, and changes in tissue density. Ultrasonic knife tip extenders are also disclosed for advancing the ultrasonic knife tip through the working channel of an endoscope or trocar sheath. Methods utilizing the foregoing apparatus are also disclosed.

Apparatus for trimming meniscus

Crystals are energized to vibrate at an ultrasonic frequency. The crystals are coupled to an insert having a body portion coaxial with the crystals so as to vibrate the insert at the ultrasonic frequency. At least one sharp cutting edge extends from one end of the body portion of the insert. The thickness of the insert may taper progressively from the body portion to the sharp cutting edge. The sharp cutting edge may actually constitute a pair of edges disposed in a scissor relationship. The cutting edge(s) may progressively converge to a sharp point. Alternately, the sharp cutting edge may be disposed at the inner periphery of an aperture. Instead of being vibrated at a single ultrasonic frequency, the insert may be vibrated at a pair of ultrasonic frequencies to impart a vibration of the insert simultaneously in the coaxial direction and in a direction perpendicular to the coaxial direction. The insert engages a meniscus to trim fragments from the meniscus. The fragments may be removed ...

Device for treating life forms with two different types of focused acoustical waves

A sound generator for treating life forms with focused acoustical waves, characterized by an electrical drivable sound source, focusing arrangement for the acoustical waves coming from the sound source and an electrical generator arrangement for driving the sound source. The generator arrangement includes at least two different generators, which are connectible to the sound source by a switch arrangement and which will drive the sound source for generating different types of acoustical waves, for example shock waves and a continuous sound or acoustical wave. The sound source may be composed of a single transducer or a plurality of transducers.

Ultrasonic treatment method and apparatus with active pain suppression

An ultrasonic medical treatment device has a probe, a transducer for mechanically vibrating the probe at an ultrasonic frequency, a voltage source for energizing the transducer, and another electrical voltage source for feeding to the probe a high-frequency alternating waveform of limited current and limited voltage to be conducted into a patient through the operative tip of the probe after placement of the operative tip into contact with the patient. The alternating waveform has a current and a voltage so limited as to prevent damage to organic tissues while stimulating nerves to reduce or suppress pain.

Apparatus with saw-toothed blade for cutting tissue

A tissue splitting device for splitting a harvested soft tissue to provide a layer of tissue having a uniform thickness and methods for tissue transplantation using uniform layers of tissue.

Ultraschallgerät zur Verwendung in der Chirurgie

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

Dual-frequency method for non-invasively treating a selected region of a living body

The method and apparatus of the invention are directed to surgically non-invasively treating skeleto/muscular injuries or of diagnosing bone fractures, involving application of two components of ultrasonic energy, to an external surface of living tissue, wherein the two components are of different frequencies in the range between 10 kHz and 4 MHz, and wherein separate transducers, each uniquely supplied with an excitation signal at a different one of said two frequencies, are directionally disposed for acoustic propagation on the same directional axis.

MULTIPLE FREQUENCY PHACOEMULSIFICATION NEEDLE DRIVER

A system for performing an ocular surgical procedure is provided. The system includes a multiple frequency signal source, a configurable tuned output filter connected to the multiple frequency signal source, and a multiple frequency ultrasonic handpiece. The multiple frequency signal source operates at a first frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the first frequency. The multiple frequency signal source operates at a second frequency and is configured to drive the configurable filter and the multiple frequency ultrasonic handpiece at the second frequency, and the design addresses third harmonic frequency issues for the multiple frequency ultrasonic handpiece. Switchable passive components, such as inductors, resistors, and/or capacitors may be employed in the configurable tuned output circuit, or alternately multiple similar circuits may be employed. Alternately, a multi-tap transformer may be provided.

ULTRASONIC BONE THERAPY APPARATUS

超音波治療処置用装置

... 本発明の方法および装置は、骨/筋肉損傷を処置し、または骨折を診断する方法に関し、10kHz乃至4MHzの範囲の異なった周波数を有する2つのエネルギ成分ソースを組織の外部表面に与えることを特徴とする。これは組織の上に重なる外部表面にアプリケーションヘッドを設け、高周波数伝送信号が重畳されている低い周波数の搬送波を有する超音波をそのヘッドを通して送信することによって行われる。その代わりに、本発明の方法は選択的に10乃至110kHzの範囲の比較的低い周波数でエネルギを放射することができる第1の部材を具備するアプリケーションヘッドを組織の外部表面に設置し、0.5乃至3MHzの範囲の周波数で第2のピエゾ電気ソースにより発生されたエネルギもまた供給するステップを有する。 ...

Ultraschallgerät zur Verwendung in der Chirurgie

Dual mode ultrasonic surgical apparatus

A single ultrasonic surgical apparatus can provide a substantial cutting effect on tissue, a substantial coagulation effect on tissue, and an appropriate blend of simultaneous cutting and coagulation effects on tissue. The ultrasonic surgical apparatus is comprised of a handpiece which incorporates a transducer and a surgical tool, a source of electrical energy, a controller, and a switch. The apparatus may be operated at two frequencies within the ultrasonic spectrum, where the first frequency is selected at the low end of the spectrum for enhanced tissue cutting performance, and the second frequency is approximately three times higher for enhanced tissue coagulation performance. The two frequencies may be operated selectively or concurrently, and may be independently adjustable as to amplitude. The transducer may be composed of magnetostrictive or piezoelectric elements. The surgeon to set the desired amplitude of the mechanical vibrations. The transducer is mounted within the handpiece ...

High-frequency electroporation for cancer therapy

The present invention relates to the field of biomedical engineering and medical treatment of diseases and disorders. Methods, devices, and systems for in vivo treatment of cell proliferative disorders are provided. In embodiments, the methods comprise the delivery of high-frequency bursts of bipolar pulses to achieve the desired modality of cell death. More specifically, embodiments of the invention relate to a device and method for destroying aberrant cells, including tumor tissues, using high-frequency, bipolar electrical pulses having a burst width on the order of microseconds and duration of single polarity on the microsecond to nanosecond scale. In embodiments, the methods rely on conventional electroporation with adjuvant drugs or irreversible electroporation to cause cell death in treated tumors. The invention can be used to treat solid tumors, such as brain tumors.

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

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

Radiation-Based Dermatological Devices and Methods

A self-contained, hand-held device for providing radiation-based dermatological treatments includes a device body configured to be handheld by a user; a laser device supported in the device body, the laser device including a laser beam source configured to emit laser radiation; an application end configured to be manually moved across the surface of the skin during a treatment session; and electronics configured to control the laser beam source to emit laser radiation toward the skin to provide a dermatological treatment; wherein the device includes no optics downstream of the laser source.

Combination Laser Treatment of Skin Conditions

A method and apparatus for treatment of health and skin conditions through the use of a combination of laser systems or a laser system capable of delivering different pulse durations. The laser system being capable of producing both Q-switched short pulsed laser energy and millisecond long pulsed laser energies. Multiple skin conditions would be susceptible to this treatment, including acne, skin aging and textural changes, pigmentary changes, scarring, rosacea, striae, redness and hair removal.

Devices and Methods for Radiation-Based Dermatological Treatments

A hand-held device for providing laser-based dermatological treatments includes a laser beam source supported in a device body, an automated scanning system, and control electronics. The automated scanning system is configured to receive an input beam generated by the laser beam source and scan the input beam to provide a series of output beams for delivery to the skin via an application end of the device to form a pattern of treatment spots on the skin. The application end is configured for movement across the skin during a treatment session. The control electronics control the laser beam source and/or the automated scanning system to deliver the scanned output beams to the skin at a radiation intensity sufficient to provide an effective dermatological treatment, and wherein the scanned output beams delivered from the application end of the device meet the Class 1M or better eye safety classification per the IEC 60825-1.

Devices and Methods for Radiation-Based Dermatological Treatments

A hand-held device for providing a dermatological treatment by scanning a laser beam to form a pattern of treatment spots on the skin includes a laser source that generates an input beam, an automated scanning system, and a treatment spot control system. The automated scanning system includes a rotating multi-sector scanning element configured to repeatedly scan the input beam, each scan providing an array of output beams corresponding to the multiple sectors of the scanning element and forming a scanned row of treatment spots on the skin. The scanning element is configured such that each sector provides a constant-angular-direction output beam as that sector rotates through the input beam. The treatment spots of each scanned row are spaced apart from each other by areas of non-irradiated skin. The treatment spot control system provides a distance between adjacent rows of treatment spots in a direction of manual movement of the device.

Cardiac Electrosurgery

Devices and methods are disclosed for providing access to the pericardial cavity while reducing risk of myocardial damage. The methods include maintaining the positions of a puncture device and of a portion of a parietal pericardium relative to one other while delivering energy from the puncture device to create a channel through the pericardium. Additional embodiments disclosed include delivering a pulse or pulses of energy to the parietal pericardium and attempting to advance the puncture device through the parietal pericardium between deliveries of energy pulses.

Electrophysiological endocardiology tool

Apparatus and methods for pacing the heart. The apparatus may include, and the methods may involve, an elongated member having: a delivery lumen that is configured to traverse the heart wall, the lumen having a proximal opening for receiving the instrument and a distal opening for deploying the instrument; and an electrically conductive member that is configured to deliver to the heart wall a current that modifies a contraction frequency. The apparatus may include an access opening closure device that has: a distal end that is configured to be disposed interior the heart and contact endocardial tissue adjacent the access opening; and a proximal end that is configured to be disposed exterior the heart and contact heart tissue adjacent the access opening; and an electrode that is configured to discharge electrical energy into the heart wall to change the frequency. The apparatus may include an injectable needle pacing electrode.

Methods and Apparatus for Ablating Lung Nodules with Vapor

Devices and systems are described for lung nodules with heated condensable vapor. The device can have an elongated shaft coupled to a vapor generator. High temperature vapor can be directed through the shaft into the lung to treat the lung nodule. In some embodiments, the device comprises a needle configured to deliver the vapor to the lung nodules. An expandable member, such as a balloon, can be provided on a distal portion of the shaft to prevent proximal flow of the high temperature vapor upon discharge from the device. Methods of use are also provided.

Circuit to generate high frequency signals

Method and apparatus for electrosurgery including tissue coagulation using very high voltage pulses of electrical energy applied to the electrosurgical probe. This minimizes heating of the surrounding tissue in the probe and is especially suitable for precise and limited coagulation and fulguration without excessive tissue charring or other damage. The power at rated load of the applied pulses to the probe is typically over 300 W and the duration of the on time is very short, so each group of pulse bursts is of relatively low duty cycle. An RF generator is also provided for delivering electrical energy to an electrosurgical probe with the proper characteristics, including fast switching times.

Radiation-Based Dermatological Devices and Methods

A self-contained, hand-held device for providing a dermatological treatment may include a device body configured to be handheld by a user, a radiation source including a beam source configured to generate an energy beam, an application end configured to be manually moved across the surface of the skin, a sensor configured to generate signals based on an interaction with the skin, and electronics configured to automatically identify a series of intrinsic skin features based on the sensor signals, and control at least one operational parameter of the radiation source based at least on the identification of such skin features.

Device, apparatus, and method of adipose tissue treatment

An improved procedure for performing liposuction is obtained by utilizing a needle that includes a laser source conductor with one end of the needle being configured for insertion into a target adipose skin volume and the other end being coupled to a laser source. The needle may include one or more channels for extracting the treated adipose area. A vacuum source can be used in the extraction of the treated adipose. Further, the first end of the needle may include a cap or end-piece that reduces the build up of carbon deposits. A temperature sensor may be used as input to adjust the laser power and prevent over exposure.

Methods for promoting wound healing

A method for promoting wound healing at a wound site includes subjecting the wound site to electrical pulses to promote wound healing during at least one of the stages of wound healing. The method may further include closing the wound site by sutures or staples prior to and or after applying the electrical pulses that promote wound healing.

PULSE GENERATOR

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

Tamper proof circuit for surgical instrument battery pack

A surgical instrument includes a shaft, an end effector extending distally from the shaft, and a housing extending proximally from the shaft. The housing includes a motor configured to generate at least one motion to effectuate the end effector, and a power source configured to supply power to the surgical instrument, wherein the power source includes a casing, a data storage unit, and a deactivation mechanism configured to interrupt access to data stored in the data storage unit. In addition, the power source includes a battery pack and a deactivation mechanism configured to deactivate the battery pack if the casing is breached.

Electrosurgical Pericaridial Puncture

Devices and methods for providing access to the pericardial cavity while reducing risk of myocardial damage. One method includes using an apparatus to apply pressure to a parietal pericardium, retracting the apparatus, and puncturing the parietal pericardium by delivering electrical energy using a puncture device. Another method includes moving a portion of parietal pericardium away from a surface of myocardium of the heart and puncturing the parietal pericardium by delivering electrical energy using a puncture device. The methods may include a step of confirming that the puncture device is at least partially within the parietal cavity by injecting or aspirating fluid through a lumen in the puncture device or measuring the pressure or electrical impedance at the distal end of the puncture device. 121.-. (canceled)22. A method of accessing a pericardial cavity of a heart comprising:a. using an apparatus to apply pressure to a parietal pericardium;b. retracting the apparatus; andc. puncturing the parietal pericardium by delivering electrical energy using a puncture device.23. The method of claim 22 , further comprising the step of advancing the puncture device through the apparatus.24. The method of claim 22 , further comprising a step of confirming that the puncture device is at least partially within the pericardial cavity.25. The method of claim 24 , wherein the step of confirming that the puncture device is at least partially within the pericardial cavity comprises injecting a contrast fluid into the pericardial cavity through a lumen of the puncture device.26. The method of claim 24 , wherein the step of confirming that the puncture device is at least partially within the pericardial cavity comprises aspirating fluid from the pericardial cavity through a lumen of the puncture device.27. The method of claim 24 , wherein the step of confirming that the puncture device is at least partially within the pericardial cavity comprises measuring electrical impedance at a ...

Liquid Ejection Device and Surgical Apparatus

A liquid ejection device that suppresses scatter of the living tissue, such as cells excised, fragmentated, or otherwise separated by ejected pulsed flow is provided. 1. A liquid ejection device that ejects a first liquid in a form of pulses through a liquid ejection opening of an ejection tube ,the liquid ejection device comprising a second liquid supply unit that supplies a second liquid through a supply tube to a region in a vicinity of the liquid ejection opening.2. The liquid ejection device according to claim 1 , a liquid suction opening provided in a vicinity of the liquid ejection opening; and', 'a suction unit that is connected to the liquid suction opening via a suction tube and sucks the first liquid and the second liquid., 'wherein the liquid ejection device comprises3. The liquid ejection device according to claim 2 ,wherein the ejection tube is inserted through the supply tube.4. The liquid ejection device according to claim 1 ,wherein the ejection tube is inserted through the suction tube.5. The liquid ejection device according to claim 1 , a liquid chamber that changes a volume thereof to produce pulsed flow of the first liquid;', 'a volume varying unit that changes an amount of change in the volume of the liquid chamber; and', 'a controller that controls a supply quantity of the second liquid supplied from the second liquid supply unit on a basis of the amount of change in the volume of the liquid chamber., 'wherein the liquid ejection device comprises6. The liquid ejection device according to claim 5 ,wherein, when the volume varying unit increases the amount of change in the volume of the liquid chamber, the controller increases the quantity of the second liquid supplied from the second liquid supply unit.7. The liquid ejection device according to claim 5 ,wherein, when the volume varying unit reduces the amount of change in the volume of the liquid chamber, the controller reduces the quantity of the second liquid supplied from the second liquid ...

Surgical visualization with proximity tracking features

A surgical visualization system is disclosed. The surgical visualization system is configured to identify one or more structure(s) and/or determine one or more distances with respect to obscuring tissue and/or the identified structure(s). The surgical visualization system can facilitate avoidance of the identified structure(s) by a surgical device. The surgical visualization system can comprise a first emitter configured to emit a plurality of tissue-penetrating light waves and a second emitter configured to emit structured light onto the surface of tissue. The surgical visualization system can also include an image sensor configured to detect reflected visible light, tissue-penetrating light, and/or structured light. The surgical visualization system can convey information to one or more clinicians regarding the position of one or more hidden identified structures and/or provide one or more proximity indicators.

LASER-DIRECTED MICROCAVITATION

Methods and systems for the controlled generation of bubbles in a medium having a liquid phase are generally provided. Laser pulses having a time-dependent pulse parameter controllable over their duration are generated. The medium is irradiated with the laser pulses with a radiant exposure sufficient to initiate microcavitation within the medium during each laser pulse. The time-dependent pulse parameter of each laser pulse is controlled according to a generally positive variation over the pulse duration such that the medium absorbs a greater quantity of energy from the laser pulse at an end of the pulse duration than at a beginning thereof. Such methods and systems may be used for various applications such as biology, medicine or material processing. 1. A method for the generation , in a medium having a liquid phase , of microcavitation bubbles of maximum volume controlled over at least twice a threshold radiant exposure , comprising:using a laser system comprising a pulse shaping mechanism, generating one or more laser pulses, each laser pulse having a pulse duration between 1 ns and 5000 ns and an energy selected to deliver a radiant exposure sufficient to initiate microcavitation within the medium during said pulse duration, each laser pulse having a tailored amplitude profile selected to deliver a greater quantity of energy to the medium during an end portion of the pulse duration than during a beginning portion thereof; andirradiating the medium with the laser pulses.2. The method according to claim 1 , wherein the pulse shaping mechanism comprises a digital pulse shaping module.3. The method according to claim 2 , wherein the laser system comprises a seed light source and first and second amplitude modulators claim 2 , the digital pulse shaping module providing control signals to the first and second amplitude modulators.4. The method according to claim 1 , wherein the pulse shaping mechanism comprises a pulse generator electrically driving a seed light ...

METHODS AND SYSTEMS FOR PULSED ILLUMINATION

Methods and systems for performing an ophthalmic surgical procedure include pulsed illumination of target tissue. The systems may include an illumination instrument arranged to illuminate tissue at a surgical site during the ophthalmic surgical procedure. A light source provides illumination to the illumination instrument for emission from the illumination instrument toward the surgical site. A controller communicates with the light source and activates the light source to provide illumination pulses at a frequency above the flickering perception in humans and with enough light for cameral exposure and human light perception. The light source pulses to minimize phototoxicity. 1. A vitreoretinal surgical system for performing an ocular treatment procedure , comprising:an illumination instrument sized and structurally configured to illuminate tissue at a surgical site during an ocular treatment procedure;a light source arranged to provide illumination to the illumination instrument for emission from the illumination instrument toward the surgical site; anda controller in communication with the light source and configured to activate the light source in a manner providing illumination pulses at a frequency above a flickering perception in humans and at an illumination level sufficient to allow a user to perform the ocular treatment procedure.2. The vitreoretinal surgical system of claim 1 , further comprising a microscope disposed and arranged to provide visualization of illuminated tissue at the surgical site to the user.3. The vitreoretinal surgical system of claim 1 , further comprising:a console including the light source; andan optical fiber extending from the console to the illumination instrument and connecting the light source and the illumination instrument.4. The vitreoretinal surgical system of claim 3 , further comprising a surgical instrument arranged to manipulate tissue at the surgical site claim 3 , the surgical instrument being attached to and powered ...

Apparatus with saw-toothed blade for cutting tissue

A tissue splitting device for splitting a harvested soft tissue to provide a layer of tissue having a uniform thickness and methods for tissue transplantation using uniform layers of tissue.

Ultrasound Catheter and Methods for Making and Using Same

Ultrasound catheter devices and methods provide enhanced disruption of blood vessel obstructions. Generally, ultrasound catheters include an elongate flexible catheter body with one or more lumens, an ultrasound transmission member extending longitudinally through the catheter body lumen and, in some embodiments, a guidewire tube extending through the lumen. A distal head for disrupting occlusions is coupled with the distal end of the ultrasound transmission member and is positioned adjacent the distal end of the catheter body. Some embodiments include improved features such as a bend in the catheter body for enhancing positioning and/or advancement of the catheter.

MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT

A motor-driven surgical cutting and fastening instrument that comprises an end effector, an electric motor, and a motor control circuit. The motor control circuit is for monitoring a parameter of the electric motor that is indicative of movement of a moveable member of the end effector, and for adjustably controlling the electric motor based on the monitored parameter to thereby adjustably control movement of the moveable member of the end effector during forward rotation of the electric motor. 1. A surgical instrument for cutting and stapling tissue , wherein the surgical instrument comprises: an electric motor; and', a battery operably coupleable to said electric motor, said battery configured to supply pulses to said electric motor; and', 'a pulse width modulation circuit operably coupleable to said battery, said pulse width modulation circuit configured to control the duration of pulses supplied from said battery to said electric motor;, 'a control system for controlling said electric motor, said control system comprising], 'a handle comprisinga shaft extending from said handle; and a plurality of staples for stapling tissue; and', 'a cutting element for cutting tissue, said cutting element configured to move at least partially through said end effector during a firing stroke, said electric motor configured to drive said cutting element with an applied power during the firing stroke, wherein the applied power applied to said cutting element is optimized by said pulse width modulation circuit., 'an end effector extending from said shaft, said end effector comprising2. The surgical instrument of claim 1 , wherein said cutting element is configured to move between a plurality of positions during the firing stroke claim 1 , the plurality of positions comprising:an initial range of positions;a pre-reversing range of positions; anda pre-stopping range of positions;wherein said pulse width modulation circuit reduces the duration of pulses during at least one of the ...

Faster rise time pulse shaping of plasma generated pressure waves for disruption of vascular calcium

A catheter system includes an inflatable balloon, an optical fiber and a laser. The optical fiber has a distal end positioned within the inflatable balloon. The optical fiber receives an energy pulse to emit light energy in a direction away from the optical fiber to generate a plasma pulse within the inflatable balloon. The laser includes a seed source that emits a seed pulse, and an amplifier that increases energy of the seed pulse. The energy pulse can have a somewhat square or triangular waveform with a duration T, a minimum power P0, a peak power PP, and a time from P0 to PP equal to TP, wherein TP is not greater than 40% of T. T can be within the range of greater than 50 ns and less than 3 μs. TP can be within the range of greater than 2.5 ns and less than 1 μs. PP can be within the range of greater than 50 kW and less than 1000 kW. A ratio in kW to ns of PP to TP can be greater than 1:5. The seed pulse can at least partially increase in amplitude over time.

METHODS AND APPARATUS FOR SELECTIVE TISSUE ABLATION

Catheter systems and methods for the selective and rapid application of DC voltage to drive irreversible electroporation are disclosed herein. In some embodiments, an apparatus includes a voltage pulse generator and an electrode controller. The voltage pulse generator is configured to produce a pulsed voltage waveform. The electrode controller is configured to be operably coupled to the voltage pulse generator and a medical device including a series of electrodes. The electrode controller includes a selection module and a pulse delivery module. The selection module is configured to select a subset of electrodes from the series of electrodes. The selection module is configured identify at least one electrode as an anode and at least one electrode as a cathode. The pulse delivery module is configured to deliver an output signal associated with the pulsed voltage waveform to the subset of electrodes. 120-. (canceled)21. A method , comprising:identifying, via a selection module of an electrode controller, a plurality of anode/cathode pairs from a plurality of electrodes of a multi-electrode catheter, the multi-electrode catheter configured to be disposed about a portion of a heart, at least one anode/cathode pair including at least one anode electrode and at least one cathode electrode;conveying a pacing signal to a pacing lead configured to be operatively coupled to the heart;receiving, at a feedback module of the electrode controller, an electrocardiograph signal associated with a function of the heart; anddelivering, via a pulse delivery module of the electrode controller, a pulsed voltage waveform to the plurality of anode/cathode pairs according to a sequential pattern, the pulsed voltage waveform including a pre-polarizing pulse followed by a polarizing pulse, the pre-polarizing pulse being generated by utilizing voltage spikes generated from switching on a discharge of a capacitor bank.22. The method of claim 21 , wherein the identifying is based on an input ...

METHODS AND APPARATUS FOR MULTI-CATHETER TISSUE ABLATION

Catheter systems, tools and methods are disclosed for the selective and rapid application of DC voltage to drive irreversible electroporation, with the system controller configurable to apply voltages to an independently selected subsets of electrodes, such that voltages of one polarity are applied to a multiplicity of electrodes on a first medical device and voltages of the opposite polarity to a multiplicity of electrodes on a second medical device. The first and second medical devices can be epicardial catheters positioned such that their opposing distal tips are approximately aligned and whose segments with electrodes collectively wrap around the pulmonary veins. 116-. (canceled)17. A method , comprising:identifying, via a selection module of an electrode controller, a plurality of anode/cathode pairs, each anode selected in the plurality of anode/cathode pairs being only in a first plurality of electrodes of a first multi-electrode catheter, each cathode selected in the plurality of anode/cathode pairs being only in a second plurality of electrodes of a second multi-electrode catheter, the first multi-electrode catheter and the second multi-electrode catheter configured to collectively surround a portion of a heart;conveying a pacing signal to a pacing lead configured to be operatively coupled to the heart;delivering, via a pulse delivery module of the electrode controller, a first output signal having a first polarity to each anode selected; anddelivering, via the pulse delivery module, a second output signal having a second polarity opposite the first polarity to each cathode selected, the first output signal and the second output signal being delivered according to a sequential pattern.18. The method of claim 17 , wherein the identifying is based on an input received from an input/output module of the electrode controller.19. The method of claim 17 , further comprising:computing an impedance between at least one anode electrode in the first plurality of ...

METHOD FOR CONTROLLING AN EYE SURGICAL LASER AND TREATMENT DEVICE

The invention relates to a method for controlling an eye surgical laser for the separation of a volume body with a predefined posterior interface and a predefined anterior interface from a cornea, comprising controlling the laser by means of a control device such that it emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea, wherein the interfaces of the volume body to be separated are defined by the predefined pattern and the interfaces are generated by means of an interaction of the individual laser pulses with the cornea by the generation of a plurality of cavitation bubbles generated by photodisruption, wherein the predefined pattern is generated by means of a mesh-like guidance of the emitted laser pulses and the control device controls the shot sequence of the laser such that a common overlap area of the cavitation bubbles is generated between adjacent cavitation bubbles. Further, the invention relates to a treatment device, to a computer program as well as to a computer-readable medium. 1. A method for controlling an eye surgical laser for the separation of a volume body with a predefined posterior interface and a predefined anterior interface from a human or animal cornea , comprising:controlling the laser by means of a control device such that it emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea, wherein the predefined posterior and anterior interfaces of the volume body to be separated are defined by the predefined pattern and the predefined posterior and anterior interfaces are generated by means of an interaction of the individual laser pulses with the cornea by the generation of a plurality of cavitation bubbles generated by photodisruption, wherein the predefined pattern is generated by means of a mesh-like guidance of the emitted laser pulses and the control device controls the shot sequence of the laser such that a common overlap area of the cavitation bubbles is generated between ...

METHOD FOR CONTROLLING AN EYE SURGICAL LASER AND TREATMENT DEVICE

The invention relates to a method for controlling an eye surgical laser for the separation of a volume body from a cornea by controlling the laser by means of a control device such that it emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea, wherein interfaces of the volume body to be separated are defined by the predefined pattern and the interfaces are generated by the generation of a plurality of cavitation bubbles generated by photodisruption, wherein the plurality of cavitation bubbles is generated along at least one cavitation bubble path and the control device controls the shot sequence of the laser for generating a preset smoothness value such that a common overlap area of the cavitation bubbles is generated at least between adjacent cavitation bubbles located on the same cavitation bubble path depending on a geometry of the respective cavitation bubble. Further, the invention relates to a treatment device, to a computer program as well as to a computer-readable medium. 1. A method for controlling an eye surgical laser for the separation of a volume body with a predefined posterior interface and a predefined anterior interface from a human or animal cornea , comprising:controlling the laser by means of a control device such that it emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea, wherein the predefined posterior and anterior interfaces of the volume body to be separated are defined by the pre-defined pattern and the predefined posterior and anterior interfaces are generated by means of an interaction of the individual laser pulses with the cornea by the generation of a plurality of cavitation bubbles generated by photodisruption, wherein the plurality of cavitation bubbles is generated along at least one cavitation bubble path and the control device controls the shot sequence of the laser for generating a preset smoothness value such that a common overlap area of the cavitation bubbles is ...

Firing member retraction devices for powered surgical instruments

A surgical instrument that includes a motor-powered drive unit that drives a portion of a firing member assembly in an axial direction to actuate a surgical end effector coupled to the instrument. The instrument may further include a retraction system configured to interact with the firing member assembly to permit a clinician to manually retract the portion of the firing member assembly should it become jammed or inadvertently stopped during a firing process. The surgical instrument includes a locking arrangement that interfaces with the retraction system and the motor-powered drive unit to prevent the transfer of the retraction forces generated by the retraction system to the motor shaft without physically separating portions of the motorized drive unit.

Secondary battery arrangements for powered surgical instruments

A power system, for powering a surgical instrument including an end effector and a motor configured to generate at least one motion to effectuate the end effector, includes a primary power source configured to supply a first power to operate the surgical instrument, wherein the primary power source is detachable from the surgical instrument, a secondary power source configured to supply a second power to operate the surgical instrument when the primary power source is detached from the surgical instrument, wherein the secondary power source is rechargeable, and wherein the primary power source is configured to charge the secondary power system, and a power management circuit configured to selectively transmit the first power from the primary power source and the secondary power from the secondary power source to operate the surgical instrument.

Electrosurgical generator

An electrosurgical generator ( 1 ) comprises a source of radio frequency (R.F.) energy, at least a pair of output terminals for connection to a bipolar electrosurgical instrument ( 3 ) and a pulsing circuit for the source. The generator ( 1 ) delivers to the electrosurgical instrument ( 3 ) an amplitude-modulated RE power signal in the form of a succession of pulses. The electrosurgical generator ( 1 ) has a blended mode comprising a rapidly alternating sequence of a first cutting mode and a second coagulation mode. The first cutting mode comprises pulses ( 11 ) having a predetermined voltage amplitude and a first pulse width, and the second coagulation mode comprises pulses ( 13 ) having a similar voltage amplitude but a second smaller pulse width.

Electrosurgical Pericardial Puncture

Devices and methods for providing access to the pericardial cavity while reducing risk of myocardial damage. One method includes advancing a distal end of a puncture device towards the heart from a subxiphoid region of a patient wherein the distal end of the puncture device is atraumatic and comprises an energy delivery device; positioning the energy delivery device at a target site on a pericardium of the heart using ultrasound for imaging; and delivering energy from the energy delivery device to a tissue of the target site to create a channel to the pericardial cavity. The method may include repeating one or more of the above steps until the energy delivery device is located within the pericardial cavity. Some embodiments of the method include using supplemental means of monitoring, including medical imaging and using contrast fluid.

Tamper proof circuit for surgical instrument battery pack

A surgical instrument includes a shaft, an end effector extending distally from the shaft, and a housing extending proximally from the shaft. The housing includes a motor configured to generate at least one motion to effectuate the end effector, and a power source configured to supply power to the surgical instrument, wherein the power source includes a casing, a data storage unit, and a deactivation mechanism configured to interrupt access to data stored in the data storage unit. In addition, the power source includes a battery pack and a deactivation mechanism configured to deactivate the battery pack if the casing is breached.

Tissue Removal Devices, Systems and Methods

A tissue removal device includes a hollow needle, an ultrasonic transducer for mechanically vibrating the needle, an aspiration line communicating with the needle, and a vacuum pulsing device for generating vacuum pulses in the needle. The device may be utilized for breaking up tissue by phacoemulsification, vacuum pulsing, or both. 1. A tissue removal device for removal of tissue from an eye during surgery , comprising:a hollow needle comprising an open distal tip;an aspiration line communicating with the needle and configured for communicating with a vacuum source, wherein the needle and the aspiration line define an aspiration path from the distal tip to the vacuum source;a vacuum device configured for controlling a vacuum at the distal tip; anda restrictor at the distal tip of the hollow needle, the restrictor having an inner diameter smaller than an inner diameter of the hollow needle removed from the distal tip.2. The device of claim 1 , wherein the vacuum device comprises a vacuum pulsing device configured to provide vacuum pulses at an open end of the distal tip.3. The device of claim 2 , wherein the vacuum pulsing device comprises an actuator and a movable member claim 2 , wherein the actuator is configured for moving the movable member alternately between a closed position that obstructs the aspiration path and an open position.4. The tissue removal device of claim 3 , wherein the actuator is pneumatically driven claim 3 , mechanically driven claim 3 , electrically driven claim 3 , electromechanically driven claim 3 , magnetically driven claim 3 , or electromagnetically driven claim 3 , and at least one of a vacuum pulse duration claim 3 , a vacuum level claim 3 , and a vacuum pulse frequency is set by the operator control.5. The tissue removal device of claim 3 , wherein the actuator is configured for communicating with a valve control device such that the movable member is movable between the open position and the closed position to induce the vacuum ...

Tamper proof circuit for surgical instrument battery pack

A surgical instrument includes a shaft, an end effector extending distally from the shaft, and a housing extending proximally from the shaft. The housing includes a motor configured to generate at least one motion to effectuate the end effector, and a power source configured to supply power to the surgical instrument, wherein the power source includes a casing, a data storage unit, and a deactivation mechanism configured to interrupt access to data stored in the data storage unit. In addition, the power source includes a battery pack and a deactivation mechanism configured to deactivate the battery pack if the casing is breached.

Method for treating and/or preventing neurodegenerative diseases by using low-intensity pulsed ultrasound (LIPUS)

This present invention discloses a method for treating and/or preventing neurodegenerative diseases by applying low-intensity pulsed ultrasound (LIPUS) stimulation. In addition, this present invention discloses the LIPUS increases neurotrophic factor protein expression, improves cognitive dysfunction and reduces brain damage in neurotoxicity.

METHODS FOR CATHETER-BASED RENAL NEUROMODULATION

Methods and apparatus are provided for monopolar neuromodulation, e.g., via a pulsed electric field. Such monopolar neuromodulation may effectuate irreversible electroporation or electrofusion, necrosis and/or inducement of apoptosis, alteration of gene expression, action potential attenuation or blockade, changes in cytokine up-regulation and other conditions in target neural fibers. In some embodiments, monopolar neuromodulation is applied to neural fibers that contribute to renal function. In some embodiments, such monopolar neuromodulation is performed bilaterally. 125-. (canceled)26. A method for catheter-based renal neuromodulation , the method comprising:intravascularly positioning a catheter in a reduced profile delivery configuration within a renal artery of a human patient and adjacent to renal nerves that innervate a kidney of the patient;transforming an expandable electrode at a distal region of the catheter from the reduced profile delivery configuration to a treatment configuration,wherein the expandable electrode comprises a helical configuration, and wherein, in the treatment configuration, the expandable electrode is sized and shaped such that the helical electrode contacts an inner wall of the renal artery of the patient; anddelivering an electric field between the expandable electrode and a ground pad coupled to an exterior of the patient, thereby thermally inhibiting neural communication along the renal nerves,wherein delivering the electric field and thermally inhibiting neural communication along the renal nerves results in a therapeutically beneficial reduction in blood pressure of the patient.27. The method of wherein the helical member comprises a self-expanding material.28. The method of wherein the helical member comprises nitinol.29. The method of wherein the catheter further comprises an expandable element proximal of the expandable electrode claim 26 , and wherein the method further comprises expanding the expandable element into ...

Methods and apparatus for selective tissue ablation

Catheter systems and methods for the selective and rapid application of DC voltage to drive irreversible electroporation are disclosed herein. In some embodiments, an apparatus includes a voltage pulse generator and an electrode controller. The voltage pulse generator is configured to produce a pulsed voltage waveform. The electrode controller is configured to be operably coupled to the voltage pulse generator and a medical device including a series of electrodes. The electrode controller includes a selection module and a pulse delivery module. The selection module is configured to select a subset of electrodes from the series of electrodes. The selection module is configured identify at least one electrode as an anode and at least one electrode as a cathode. The pulse delivery module is configured to deliver an output signal associated with the pulsed voltage waveform to the subset of electrodes.

Electrically enhanced retrieval of material from vessel lumens

Retrieval of material from vessel lumens can be improved by electrically enhancing attachment of the material to the thrombectomy system. The system can include a catheter having a distal portion configured to be positioned adjacent to a thrombus in a blood vessel, an electrode disposed at the distal portion of the catheter, and an interventional element configured to be delivered through a lumen of the catheter. The electrode and the interventional element are each configured to be electrically coupled to an extracorporeal power supply.

Laser therapy apparatus

A laser therapy apparatus having a diode-based continuous emission laser source, a diode-based pulsed emission laser source, and a terminal handpiece. The laser therapy apparatus further includes a bundle of optic fibers for coupling between individual diodes of the diode-based pulsed emission laser source, which is interfaced with a single optic fiber which terminates in the handpiece.

CATHETER SENSING AND IRRIGATING

Ablation systems of the present disclosure facilitate the safe formation of wide and deep lesions. For example, ablation systems of the present disclosure can allow for the flow of irrigation fluid and blood through an expandable ablation electrode, resulting in efficient and effective cooling of the ablation electrode as the ablation electrode delivers energy at a treatment site of the patient. Additionally, or alternatively, ablation systems of the present disclosure can include a deformable ablation electrode and a plurality of sensors that, in cooperation, sense the deformation of the ablation electrode, to provide a robust indication of the extent and direction of contact between the ablation electrode and tissue at a treatment site. 123-. (canceled)24. A catheter , comprising:an elongated shaft having a proximal end region and a distal end region;an irrigation element at the distal end region of the elongated shaft and positioned to direct irrigation fluid away from the distal end region of the elongated shaft; andan electrical energy delivery electrode at the distal end region of the elongated shaft and enveloping the irrigation element, the electrical energy delivery electrode comprises multiple struts that define a plurality of bounded cells,', 'the struts are configured to conduct and deliver electrical energy along a majority of their length,', 'the struts are movable relative to one another, and', 'at least a portion of the struts are in electrical communication with one another to form a single electrical conductor., 'wherein—'}25. The catheter of wherein the electrical energy delivery electrode comprises a braid.26. The catheter of wherein the electrical energy delivery electrode comprises a mesh.27. The catheter of wherein the struts are coupled to one another at joints.28. The catheter of wherein the struts are moveable relative to one another such that a radial dimension of the electrical energy delivery electrode increases as the struts move ...

Reflective power monitoring for microwave applications

A system and method for supplying microwave energy to tissue for microwave therapy includes an electrosurgical generator having an output for coupling to a surgical instrument. The electrosurgical generator includes a microwave energy source and a controller for controlling the operation of the electrosurgical generator. The surgical instrument, coupled to the electrosurgical generator, includes a microwave antenna for delivering microwave energy from the microwave energy source. The controller of the electrosurgical generator is operable for causing the electrosurgical generator to apply at least two pulses of microwave energy.

SYSTEMS AND METHODS FOR LASER PULSE ENERGY CONTROL

A laser pulse energy control system which includes a laser source and a beam divider positioned to receive a calibration laser pulse produced by the laser source. The beam divider reflects a first portion of the calibration laser pulse along a first optical path toward a first plane and transmits a second portion of the calibration laser pulse along a second optical path toward a second plane. An energy meter determines an energy of the first portion of the calibration laser pulse at the first plane and a fluence profiler determines a fluence profile of the second portion of the calibration laser pulse at the second plane. The processor controls an energy of an ablation laser pulse produced by the laser source based on the fluence profile of the second portion of the calibration laser pulse and the energy of the first portion of the calibration laser pulse. 1. A laser pulse energy control system comprising:a laser source;a beam divider positioned to receive a calibration laser pulse produced by the laser source, the beam divider configured to reflect a first portion of the calibration laser pulse along a first optical path toward a first plane, and transmit a second portion of the calibration laser pulse along a second optical path toward a second plane;an energy meter configured to determine an energy of the first portion of the calibration laser pulse at the first plane;a fluence profiler configured to determine a fluence profile of the second portion of the calibration laser pulse at the second plane; anda processor configured to control an energy of an ablation laser pulse produced by the laser source based on the fluence profile of the second portion of the calibration laser pulse and the energy of the first portion of the calibration laser pulse.2. The system of claim 1 , wherein the processor is further configured to control the energy of the ablation laser pulse by:determining a target energy based on the fluence profile of the second portion of the ...

Liquid ejection control apparatus, liquid ejection system, and control method

A liquid ejection control apparatus, which controls a drive voltage waveform applied to a piezoelectric element so as to control ejection of a pulsed liquid jet, includes a first operation unit that receives input of an index value for setting a flow velocity peak timing of a main jet of the pulsed liquid jet, and a control unit that sets a rising portion of the drive voltage waveform according to the index value so as to control changing of the drive voltage waveform.

Operator-Controlled Scanning Laser Procedure Designed for Large-Area Epithelium Removal

Systems and methods for removing an epithelial layer disposed over a stromal layer in a cornea irradiate a region of the epithelial layer with a pulsed beam of ablative radiation. The ablative radiation is scanned to vary the location of the beam within the region in accordance with a pulse sequence. The pulse sequence is arranged to enhance optical feedback based on a tissue fluorescence of the epithelial layer. The penetration of the epithelial layer is detected in response to the optical feedback. The use of scanning with the pulse sequence arranged to enhance optical feedback allows large areas of the epithelium to be ablated such penetration of the epithelial layer can be detected.

Ultrasonic generator systems and methods

Embodiments shown and described herein relate, in general, to systems and methods for driving ultrasonic transducers and, more particularly, to systems and methods for controlling the output of high power ultrasonic transducers and improving performance of ultrasonic systems.

END EFFECTOR DETENTION SYSTEMS FOR SURGICAL INSTRUMENTS

A surgical instrument system can comprise a surgical instrument, a first end effector, and a second end effector, wherein the end effectors are attachable to the surgical instrument. The first end effector can comprise a first set of stored data pertaining to the first end effector, wherein the surgical instrument is configured to ascertain the first set of data and enter a first operating state. The second end effector can comprise a second set of stored data pertaining to the second end effector, wherein the surgical instrument is configured to ascertain the second set of data and enter a second operating state. The surgical instrument is further configured to enter a default operating state if said surgical instrument is unable to ascertain a set of stored data from an end effector. 1. A surgical instrument system , comprising:a surgical instrument;a first end effector attachable to said surgical instrument, wherein said first end effector comprises a first set of stored data regarding a first set of end effector parameters pertaining to said first end effector, and wherein said surgical instrument is configured to ascertain said first set of data and enter a first operating state after ascertaining said first set of stored data; anda second end effector attachable to said surgical instrument, wherein said second end effector comprises a second set of stored data regarding a second set of end effector parameters pertaining to said second end effector, wherein said surgical instrument is configured to ascertain said second set of data and enter a second operating state after ascertaining said second set of stored data, and wherein said surgical instrument is configured to enter a default operating mode if said surgical instrument is unable to ascertain a set of stored data from an end effector.2. The surgical instrument system of claim 1 , wherein said first end effector comprises a first wireless transmitter configured to transmit a first signal incorporating ...

CONTROLLED TISSUE COMPRESSION SYSTEMS AND METHODS

A surgical instrument is provided including an end effector configured to clamp, staple or cut tissue, a motor configured to drive the end effector and a control system. The control system is configured to receive information about at least one tissue property and select a tissue management mode based on the at least one tissue property. The control system controls the motor based on the selected tissue management mode. 1. A method of operating a powered surgical instrument , the method comprising:activating a motor of a surgical instrument, thereby clamping tissue with an end effector of the surgical instrument;determining at least one tissue property of the clamped tissue; andselecting a tissue management mode from a plurality of tissue management modes based on the determined at least one tissue property of the clamped tissue, the plurality of tissue management modes including a constant torque profile, a modulated torque profile, and a maximum torque profile, wherein the end effector is configured to apply a discrete strain on the clamped tissue in each of the plurality of tissue management modes.2. The method according to claim 1 , further comprising activating the motor of the surgical instrument to apply the discrete strain on the clamped tissue by the end effector.3. The method according to claim 2 , wherein in the constant torque profile tissue management mode claim 2 , the motor is configured to generate a constant torque.4. The method according to claim 2 , wherein in the modulated torque profile tissue management mode claim 2 , the motor is configured to receive a periodic signal.5. The method according to claim 2 , wherein in the maximum torque profile tissue management mode claim 2 , the motor is configured to cause the end effector to clamp the tissue at a faster rate than in the constant and modulated torque profile tissue management modes.6. The method according to claim 2 , further comprising firing the surgical instrument to apply staples to the ...

Systems, devices, and methods for delivery of pulsed electric field ablative energy to endocardial tissue

Systems, devices, and methods for electroporation ablation therapy are disclosed, with the system including a pulse waveform signal generator for medical ablation therapy, and an endocardial ablation device includes at least one electrode for ablation pulse delivery to tissue. The signal generator may deliver voltage pulses to the ablation device in the form of a pulse waveform. The system may include a cardiac stimulator for generation of pacing signals and for sequenced delivery of pulse waveforms in synchrony with the pacing signal.

System and Method for Controlling an Ultrasonic Tool

Systems () and methods () of controlling an ultrasonic surgical tool () with a console () are provided. A first drive signal () is applied to the ultrasonic surgical tool (). A characteristic of a harmonic signal () resulting from application of the first drive signal () to the ultrasonic surgical tool () is acquired. A cancellation signal () is generated based on the characteristic of the harmonic signal (). The first drive signal () and the cancellation signal () are combined to produce a second drive signal () that is sinusoidal. The second drive signal () is applied to the ultrasonic surgical tool () such that presence of the harmonic signal () resulting from application of the second drive signal () is reduced relative to presence of the harmonic signal () resulting from application of the first drive signal (). 1122044. A method () of controlling an ultrasonic surgical tool () to reduce presence of a harmonic signal () , the method comprising:{'b': 20', '40, 'driving the ultrasonic surgical tool () with a first drive signal ();'}{'b': 44', '20', '40', '44, 'acquiring characteristics of the harmonic signal () resulting from driving the ultrasonic surgical tool () with the first drive signal (), the characteristics being at least a frequency and a phase of the harmonic signal ();'}{'b': 70', '44', '44, 'generating a cancellation signal () with a frequency similar to the frequency of the harmonic signal () and a phase that is shifted in relation to the phase of the harmonic signal ();'}{'b': 40', '70', '80', '80, 'combining the first drive signal () and the cancellation signal () to produce a second drive signal (), the second drive signal () being sinusoidal; and'}{'b': 20', '80', '44', '20', '80', '44', '20', '40, 'driving the ultrasonic surgical tool () with the second drive signal () such that presence of the harmonic signal () resulting from driving the ultrasonic surgical tool () with the second drive signal () is reduced relative to presence of the ...

Treatment instrument and high-voltage connectors for robotic surgical system

Described herein are methods and systems for using the treatment tip apparatuses and high-voltage connectors with robotic surgical systems. For example, retractable treatment tip apparatuses (e.g., devices, systems, etc.) including one, or more preferably a plurality, of electrodes that are protected by a housing (which may be retractable) until pressed against the tissue for deployment of the electrodes and delivery of a therapeutic treatment, are disclosed. In particular, these apparatuses may include a plurality of treatment needle electrodes and may be configured for the delivery of nanosecond pulsed electric fields. Also described herein are high-voltage connectors configured to provide high-voltage energy, such as nsPEF pulses, from a generator to the retractable treatment tip apparatuses.

Motor-driven surgical cutting instrument

A motor-driven surgical cutting and fastening instrument that comprises an end effector, an electric motor, and a motor control circuit. The motor control circuit is for monitoring a parameter of the electric motor that is indicative of movement of a moveable member of the end effector, and for adjustably controlling the electric motor based on the monitored parameter to thereby adjustably control movement of the moveable member of the end effector during forward rotation of the electric motor.

Input shaper for robotic surgical system

Input shapers for control inputs to the robotic surgical system and their method of controlling a linkage of a robot with a controller includes receiving a desired joint angle of a joint of the robot; and transmitting a first control signal to a motor to actuate the joint in response to a desired joint velocity, the desired joint velocity being a function of the desired joint angle and a current joint angle of the joint.

Ultrasonic probe

A method of treating a calculi mass can include using an ultrasonic probe to produce acoustic energy and fragment the mass. The method can include varying the frequency at which fragmentation occurs to treat the mass with a resonant frequency. The ultrasonic probe can have a distal tip for contact with the mass, where the tip has a morphology for concentrating stress on the mass. The ultrasonic probe can have two or more ultrasonic horns to allow for higher voltage and power levels.

Methods and Apparatus for Monopolar Renal Neuromodulation

Methods and apparatus are provided for monopolar neuromodulation, e.g., via a pulsed electric field. Such monopolar neuromodulation may effectuate irreversible electroporation or electrofusion, necrosis and/or inducement of apoptosis, alteration of gene expression, action potential attenuation or blockade, changes in cytokine up-regulation and other conditions in target neural fibers. In some embodiments, monopolar neuromodulation is applied to neural fibers that contribute to renal function. In some embodiments, such monopolar neuromodulation is performed bilaterally.

LASER MODULATION FOR COAGULATION

An apparatus has a pump module providing pump energy, a resonator and a controller. The resonator includes a gain medium receiving the pump energy from the pump module and producing light; reflective surfaces reflecting light produced by the gain medium back toward the gain medium; and a variable light attenuator receiving light produced by the gain medium. The controller controls the amount of light attenuated by the variable light attenuator such that the apparatus emits windows of pulses of laser light at spaced time intervals, each window containing a plurality of pulses of laser light and each interval between windows being larger than an interval between pulses within a window. The emitted windows of pulses of laser light heat tissue to a temperature that causes coagulation without vaporization. 120-. (canceled)21. An apparatus comprising:a pump module providing pump energy; a gain medium receiving the pump energy from the pump module and producing light;', 'at least two at least partially reflective surfaces reflecting light produced by the gain medium back toward the gain medium;', 'a variable light attenuator receiving light produced by the gain medium;, 'a resonator comprisinga controller that provides a driver signal to the variable light attenuator to control the amount of light attenuated by the variable light attenuator such that the apparatus emits windows of pulses of laser light at spaced time intervals, each window containing a plurality of pulses of laser light and each interval between windows being larger than an interval between pulses within a window, the duration of the windows and the duration of the intervals between windows being such that the emitted windows of pulses of laser light heat tissue to a temperature that causes coagulation, wherein the provided driver signal is at a first magnitude during the intervals between windows, transitions to a second magnitude to cause the apparatus to emit a first pulse of laser light of a window, ...

SYSTEMS AND METHODS FOR CONTROLLING LASER PULSING

Techniques are provided for controlling an output laser pulse signal of a medical device. A control device defines a time duration of capacitive discharge to a laser device. The time duration corresponds to an intended energy of the output laser pulse signal. The control device generates a plurality of sub-pulse control signals. The sub-pulse control signals define a series of capacitive discharge events of the capacitor bank. The control device modulates one or more of a sub-pulse control signal period or a sub-pulse time duration of the sub-pulse control signals to modify the capacitive discharge of the capacitor bank to the laser device during the time duration. 1. A method for controlling an output laser pulse signal of a medical device , the method comprising:at a control device, defining a time duration of capacitive discharge of a capacitor bank to a laser device, wherein the time duration corresponds to an intended energy of the output laser pulse signal;generating a plurality of sub-pulse control signals that define a series of capacitive discharge events of the capacitor bank; andmodulating one or more of a sub-pulse control signal period or a sub-pulse time duration of the sub-pulse control signals to modify the capacitive discharge of the capacitor bank to the laser device during the time duration.2. The method of claim 1 , further comprising modifying the time duration of capacitive discharge by modifying the plurality of sub-pulse control signals.3. The method of claim 2 , wherein modifying the time duration comprises modifying the time duration between a start of a first sub-pulse control signal and an end of a last sub-pulse control signal.4. The method of claim 1 , wherein the sub-pulse control signal period corresponds to time elapsed between a start of the first sub-pulse control signal and a start of a subsequent sub-pulse control signal.5. The method of claim 1 , wherein the sub-pulse time duration corresponds to time elapsed between a start of ...

DETECTING SHORT CIRCUITS IN ELECTROSURGICAL MEDICAL DEVICES

A control circuit for use with an electrosurgical system is disclosed. The control circuit is programmed to provide an electrosurgical signal comprising a plurality of pulses to first and second electrodes and receive a first reading of an impedance between the first and second electrodes. The control circuit is programmed to receive a second reading of the impedance between the first and second electrodes. The control circuit is programmed to determine a difference between the first and second readings and determine that a short circuit is present between the first and second electrodes based on a magnitude of the difference between the first reading and the second reading. The control circuit is programmed to generate a signal indicating the short circuit between the first and second electrodes. 1. A control circuit for use with an electrosurgical system , wherein the control circuit is programmed to:provide an electrosurgical signal comprising a plurality of pulses to first and second electrodes;receive a first reading of an impedance between the first and second electrodes, wherein the first reading is taken during the provision of a pulse of the electrosurgical signal;receive a second reading of the impedance between the first and second electrodes, wherein the second reading is taken during the provision of a subsequent pulse of the electrosurgical signal;determine a difference between the first and second readings;determine that a short circuit is present between the first and second electrodes based on a magnitude of the difference between the first reading and the second reading; andgenerate a signal indicating the short circuit between the first and second electrodes.2. The control circuit of claim 1 , wherein the pulse and the subsequent pulse are adjacent pulses of the electrosurgical signal.3. The control circuit of claim 1 , wherein the control circuit is further programmed to:receive a third reading of the impedance between the first and second ...

SYSTEMS, METHODS AND DEVICES FOR PROGRESSIVELY SOFTENING MULTI-COMPOSITIONAL INTRAVASCULAR TISSUE

Various embodiments of the systems, methods and devices are provided comprising angioplasty to break up calcification or other tissue in occlusive areas within a blood vessel. The various embodiments disclosed comprise pressure pulse periods designed to break up calcified occlusive material through a cyclically stretching of the vessel walls without damaging the vessel wall tissue. 1. A system for treating a blood vessel , comprising:an inflatable balloon operatively connected to a catheter;a fluid reservoir in operative fluid communication with the inflatable balloon;a pressure controller in operative communication with the fluid reservoir and adapted to deliver fluid from the fluid reservoir with a plurality of pressure pulse periods, each pressure pulse period comprising at least one balloon inflation comprising at least one pressure magnitude, the pressure controller further adapted to provide a relaxation period between successive pressure pulse periods, each relaxation period comprising a balloon pressure that is greater than zero; anda processor in operative communication with the pressure controller, the processor comprising programmed instructions that, when executed, results in programmed execution of the plurality of pulse periods and the relaxation period between successive pulse periods.2. The system of claim 1 , wherein the programmed instructions further comprise at least one of the predetermined variables in the group consisting of: initial pressure magnitude claim 1 , maximum pressure magnitude claim 1 , final pressure magnitude claim 1 , time of pressure application claim 1 , time of relaxation period claim 1 , pressure of relaxation period claim 1 , and velocity of pressure application.3. The system of claim 1 , wherein the programmed instructions are adapted to ensure that the at least one pressure magnitude increases within each successive pressure pulse period in the plurality of pulse periods over time.4. The system of claim 1 , wherein the ...

Detecting short circuits in electrosurgical medical devices

An electrosurgical system for providing an electrosurgical signal to a patient is disclosed. The electrosurgical system includes a control circuit, wherein the control circuit is programmed to: provide the electrosurgical signal to a first electrode and a second electrode, receive a plurality of input variables, wherein the plurality of input variables are indicative of a short being either present or absent between the first electrode and the second electrode, and apply a short detection algorithm to the plurality of input variables to indicate either a short circuit or no short circuit between the first electrode and the second electrode during the provision of the electrosurgical signal. The plurality of input variables may include at least one impedance level between the first electrode and the second electrodes during the provision of the electrosurgical signal. The short detection algorithm applied may include a fuzzy logic algorithm, a neural network algorithm, or neuro-fuzzy algorithm.

TORQUE OPTIMIZATION FOR SURGICAL INSTRUMENTS

A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor. The speed management control can include a pulse width modulation circuit, which can control the duration of pulses supplied from the battery to the motor. The motor can include a primary set of coils and a secondary set of coils. The control system can direct surplus current to the secondary set of coils to maximize the torque generated by the motor. 1. A surgical stapler , comprising:an end effector comprising a plurality of deployable staples and a firing element;a motor configured to drive said firing element, wherein said motor comprises a primary set of coils and a secondary set of coils; and a battery;', 'a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said motor; and', a first operating state in which the primary set of coils are configured to drive said firing element; and', 'a second operating state in which said primary set of coils and said secondary set of coils are configured to drive said firing element., 'a switch configured to switch the electric motor between a plurality of operating states, wherein the plurality of operating states comprises], 'a control system in signal communication with said motor, wherein said control system comprises2. The surgical stapler of claim 1 , wherein the battery supplies current pulses to said primary set of coils at a voltage that corresponds to the maximum torque of said primary set of coils during the first operating state.3. The surgical stapler of claim 2 , wherein a surplus current is supplied to said secondary set of coils during the second operating state.4. The surgical stapler of claim 3 , wherein said control system maximizes the surplus current supplied to said secondary set of coils during the second operating state based on the volt-ampere limit of said battery.5. The surgical ...

TORQUE OPTIMIZATION FOR SURGICAL INSTRUMENTS

A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor. The speed management control can include a pulse width modulation circuit, which can control the duration of pulses supplied from the battery to the motor. The motor can include a primary set of coils and a secondary set of coils. The control system can direct surplus current to the secondary set of coils to maximize the torque generated by the motor. 1. A surgical stapler , comprising:an end effector comprising a plurality of deployable staples and a firing element;a motor configured to drive said firing element, wherein said motor comprises a primary set of coils and a secondary set of coils; and a battery;', 'a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said motor; and', a first operating state in which the primary set of coils are configured to drive said firing element; and', 'a second operating state in which said primary set of coils and said secondary set of coils are configured to drive said firing element., 'a switch configured to switch the electric motor between a plurality of operating states, wherein the plurality of operating states comprises], 'a control system in signal communication with said motor, wherein said control system comprises2. The surgical stapler of claim 1 , wherein the battery supplies current pulses to said primary set of coils at a voltage that corresponds to the maximum torque of said primary set of coils during the first operating state.3. The surgical stapler of claim 2 , wherein a surplus current is supplied to said secondary set of coils during the second operating state.4. The surgical stapler of claim 3 , wherein said control system maximizes the surplus current supplied to said secondary set of coils during the second operating state based on the volt-ampere limit of said battery.5. The surgical ...

Shroud retention arrangement for sterilizable surgical instruments

A surgical instrument comprises a shaft, an end effector extending distally from the shaft, and a housing extending proximally from the shaft. The housing comprises a first shroud portion, a second shroud portion, a working assembly nested in the first shroud portion, wherein the working assembly is detachable from the first shroud portion, wherein the second shroud portion is removably couplable to the first shroud portion to permit the working assembly to be detached from the first shroud portion, and at least one securing member movable to secure the working assembly to the first shroud portion.

Ultrasonic Diagnosis/Treatment Device and Ultrasonic Diagnosis/Treatment Method

An ultrasonic diagnosis/treatment device includes a placement surface formed of an inner surface of a sphere; a plurality of ultrasonic transducers placed on the placement surface so that a focal point of an ultrasonic wave to be emitted is located at a position that is near an outside of an outer surface of a subject and is spaced apart from the outer surface by a predetermined distance; and a control part configured to control transmission and reception of each of the ultrasonic transducers. The control part includes a diagnosis mode in which at least one ultrasonic transducer is oscillated toward a diagnosis region within a subject and a reflected wave from the diagnosis region is received by the at least one ultrasonic transducer to visualize the reflected wave, and a treatment mode in which the at least one ultrasonic transducer is oscillated toward an inside of the subject.

Systems And Methods To Modify Intravascular Lesions

A system including a console and a catheter assembly. The console may include an ultrasound-producing mechanism configured to convert an electric current into a vibrational energy. The console also may include a driving-parameter modifier configured to modify driving parameters to selectively provide one or more output modes for the vibrational energy. The catheter assembly may include a sheath including a sheath lumen and a core wire at least partially disposed within the sheath lumen. The core wire may include a proximal portion and a distal portion of the core wire, wherein the proximal portion of the core wire is coupled to the ultrasound-producing mechanism. A working length of the distal portion of the core wire beyond the sheath may be configured for longitudinal, transverse, or longitudinal and transverse displacement in accordance with the one or more output modes for the vibrational energy to effect different intravascular lesion-modification procedures. 1. A system , comprising: an ultrasound-producing mechanism configured to convert an electric current into a vibrational energy; and', 'a driving-parameter modifier configured to modify driving parameters to selectively provide one or more output modes for the vibrational energy; and, 'a console comprising a sheath comprising a sheath lumen; and', the proximal portion of the core wire is coupled to the ultrasound-producing mechanism; and', 'a working length of the distal portion of the core wire beyond the sheath is configured for longitudinal, transverse, or longitudinal and transverse displacement in accordance with the one or more output modes for the vibrational energy to effect different intravascular lesion-modification procedures., 'a core wire at least partially disposed within the sheath lumen comprising a proximal portion and a distal portion of the core wire, wherein], 'a catheter assembly comprising2. The system according to claim 1 , wherein the driving-parameter modifier is configured to ...

Methods of treating a thrombus in a vein using cyclical aspiration patterns

Vascular treatment devices and methods include a woven structure including a plurality of bulbs that may be self-expanding, a hypotube, for example including interspersed patterns of longitudinally spaced rows of kerfs, and a bonding zone between the woven structure and the hypotube. The woven structure may include patterns of radiopaque filaments measurable under x-ray. Structures may be heat treated to include various shapes at different temperatures. The woven structure may be deployable to implant in a vessel. A catheter may include a hypotube including interspersed patterns of longitudinally spaced rows of kerfs and optionally a balloon. Laser cutting systems may include fluid flow systems.

SECONDARY BATTERY ARRANGEMENTS FOR POWERED SURGICAL INSTRUMENTS

A power system, for powering a surgical instrument including an end effector and a motor configured to generate at least one motion to effectuate the end effector, includes a primary power source configured to supply a first power to operate the surgical instrument, wherein the primary power source is detachable from the surgical instrument, a secondary power source configured to supply a second power to operate the surgical instrument when the primary power source is detached from the surgical instrument, wherein the secondary power source is rechargeable, and wherein the primary power source is configured to charge the secondary power system, and a power management circuit configured to selectively transmit the first power from the primary power source and the secondary power from the secondary power source to operate the surgical instrument. 1. A surgical instrument , comprising:a shaft;an end effector extending distally from said shaft; and a motor configured to generate at least one motion to effectuate said end effector;', 'a primary power source configured to supply a first power to operate said surgical instrument, wherein said primary power source is detachable from said housing; and', 'a secondary power source configured to supply a second power to operate said surgical instrument when said primary power source is detached from said housing., 'a housing extending proximally from said shaft, said housing comprising2. The surgical instrument of claim 1 , further comprising a controller claim 1 , wherein said secondary power source is configured to supply said second power to operate said controller when said primary power source is detached from said housing.3. The surgical instrument of claim 1 , wherein said primary power source is rechargeable.4. The surgical instrument of claim 1 , wherein said secondary power source is rechargeable.5. The surgical instrument of claim 4 , wherein said primary power source is configured to recharge said secondary power ...

TORQUE OPTIMIZATION FOR SURGICAL INSTRUMENTS

A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor. The speed management control can include a pulse width modulation circuit, which can control the duration of pulses supplied from the battery to the motor. The motor can include a primary set of coils and a secondary set of coils. The control system can direct surplus current to the secondary set of coils to maximize the torque generated by the motor. 1. A surgical stapler , comprising:an end effector comprising a plurality of deployable staples and a firing element;a motor configured to drive said firing element, wherein said motor comprises a primary set of coils and a secondary set of coils; and a battery;', 'a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said motor; and', a first operating state in which the primary set of coils are configured to drive said firing element; and', 'a second operating state in which said primary set of coils and said secondary set of coils are configured to drive said firing element., 'a switch configured to switch the electric motor between a plurality of operating states, wherein the plurality of operating states comprises], 'a control system in signal communication with said motor, wherein said control system comprises2. The surgical stapler of claim 1 , wherein the battery supplies current pulses to said primary set of coils at a voltage that corresponds to the maximum torque of said primary set of coils during the first operating state.3. The surgical stapler of claim 2 , wherein a surplus current is supplied to said secondary set of coils during the second operating state.4. The surgical stapler of claim 3 , wherein said control system maximizes the surplus current supplied to said secondary set of coils during the second operating state based on the volt-ampere limit of said battery.5. The surgical ...

TORQUE OPTIMIZATION FOR SURGICAL INSTRUMENTS

A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor. The speed management control can include a pulse width modulation circuit, which can control the duration of pulses supplied from the battery to the motor. The motor can include a primary set of coils and a secondary set of coils. The control system can direct surplus current to the secondary set of coils to maximize the torque generated by the motor. 1. A surgical stapler , comprising:an end effector comprising a plurality of deployable staples and a firing element;a motor configured to drive said firing element, wherein said motor comprises a primary set of coils and a secondary set of coils; and a battery;', 'a pulse width modulation circuit configured to control the duration of current pulses supplied from said battery to said motor; and', a first operating state in which the primary set of coils are configured to drive said firing element; and', 'a second operating state in which said primary set of coils and said secondary set of coils are configured to drive said firing element., 'a switch configured to switch the electric motor between a plurality of operating states, wherein the plurality of operating states comprises], 'a control system in signal communication with said motor, wherein said control system comprises2. The surgical stapler of claim 1 , wherein the battery supplies current pulses to said primary set of coils at a voltage that corresponds to the maximum torque of said primary set of coils during the first operating state.3. The surgical stapler of claim 2 , wherein a surplus current is supplied to said secondary set of coils during the second operating state.4. The surgical stapler of claim 3 , wherein said control system maximizes the surplus current supplied to said secondary set of coils during the second operating state based on the volt-ampere limit of said battery.5. The surgical ...

Methods of treating a vessel using an aspiration pattern

Vascular treatment devices and methods include a woven structure including a plurality of bulbs that may be self-expanding, a hypotube, for example including interspersed patterns of longitudinally spaced rows of kerfs, and a bonding zone between the woven structure and the hypotube. The woven structure may include patterns of radiopaque filaments measureable under x-ray. Structures may be heat treated to include various shapes at different temperatures. The woven structure may be deployable to implant in a vessel. A catheter may include a hypotube including interspersed patterns of longitudinally spaced rows of kerfs and optionally a balloon. Laser cutting systems may include fluid flow systems.

Ultrasound catheter system

A method of recanalizing a lumen of a vessel includes positioning an ultrasonic device having a distal end in a first position within the lumen of the vessel; transmitting pulsed ultrasonic vibrations though the ultrasonic device to the distal end; and advancing the distal end through the lumen to recanalize the vessel.

METHODS OF TREATING INTRACEREBRAL HEMORRHAGES USING CYCLICAL ASPIRATION PATTERNS

An aspiration system includes a pump and a control system in communication with the pump. The control system includes a microcontroller, an antenna configured to receive a signal, and a pump control board in communication with the microcontroller. The antenna is in communication with the microcontroller. Upon receiving the signal, the pump control board operates the pump to create negative pressure according to the signal. 1. A method of treating an intracerebral hemorrhage using a repetitive cyclical pattern for aspiration , the method comprising:inserting a distal end of a single-lumen cannula through a burr-hole in a skull;choosing the cyclical pattern from a plurality of provided cyclical patterns or customizing the cyclical pattern, the cyclical pattern comprising repetition of a first suction level, a second suction level different than the first suction level, and a third suction level different than the first suction level and the second suction level, wherein the cyclical pattern comprises a crescendo suction pattern or a diminuendo suction pattern; andaspirating blood through the cannula according to the chosen cyclical pattern by negative suction from a pump.2. The method of claim 1 , wherein the cyclical pattern comprises a crescendo suction pattern.3. The method of claim 1 , wherein the cyclical pattern comprises a diminuendo suction pattern.4. The method of claim 1 , wherein the cannula is configured to be inserted through a port of a neuro-endoscope.5. A method of treating an intracerebral hemorrhage using a repetitive cyclical pattern for aspiration claim 1 , the method comprising:inserting a distal end of a cannula through a burr-hole in a skull;selecting the cyclical pattern from a plurality of provided cyclical patterns or customizing the cyclical pattern, the cyclical pattern comprising repetition of a first suction level and a second suction level different than the first suction level, wherein the cyclical pattern comprises a crescendo suction ...

FLUID EJECTION DEVICE AND METHOD TO CONTROL FLUID EJECTION DEVICE

A fluid ejection device includes a pulsating flow generation section adapted to eject a fluid in a pulsed manner; a fluid supply section adapted to supply the pulsating flow generation section with the fluid; a fluid supply tube having flexibility adapted to communicate the pulsating flow generation section and the fluid supply section with each other; and a drive control section adapted to perform drive control of the pulsating flow generation section and the fluid supply section, wherein the drive control section starts up the pulsating flow generation section, makes the fluid supply section supply the fluid at a first flow rate for a predetermined time period, and then makes the fluid supply section supply the fluid at a second flow rate lower than the first flow rate after the predetermined time period elapses. 14-. (canceled)5. A fluid ejection device comprising:a pulsating flow generation section configured to eject a fluid in a pulsed manner from a nozzle;a fluid supply section configured to supply the fluid to the pulsating flow generation section;a fluid supply tube having flexibility configured to communicate with the pulsating flow generation section and the fluid supply section; anda drive control section configured to control the pulsating flow generation section and the fluid supply section,wherein the pulsating flow generation section has an entrance channel which communicates with the fluid supply tube and an exit channel which communicates with the nozzle,wherein an inertance of the entrance channel is larger than an inertance of the exit channel,wherein the drive control section starts up the pulsating flow generation section, makes the fluid supply section supply the fluid to the pulsating flow generation section at a first flow rate for a predetermined time period,and then makes the fluid supply section supply the fluid to the pulsating flow generation section at a second flow rate lower than the first flow rate after the predetermined time ...

Irradiation device and method for irradiating a radiation absorbing medium, hearing aid device and laser surgery device, in particular for laser ear surgery, with such an irradiation device

The invention relates to an irradiation device and a corresponding method for irradiating a radiation absorbing medium, as well as a hearing aid device and a laser surgery device comprising such an irradiation device. A radiation source is configured to generate one or more pulses of electromagnetic radiation and to irradiate the medium with the one or more pulses of electromagnetic radiation. A control unit is configured to control the radiation source such that the time course of the power or intensity of at least one pulse of the one or more pulses of electromagnetic radiation exhibits a rising slope and/or a falling slope, wherein the rising slope and/or falling slope has a maximum gradient which is smaller than a predetermined gradient value, whereby a generation of optoacoustic waves in the medium in response to the rising slope or falling slope, respectively, is avoided or significantly reduced.

Method for usage of the shroud as an aspect of sensing or controlling a powered surgical device, and a control algorithm to adjust its default operation

A method for controlling a surgical instrument is disclosed. In at least one instance, the surgical instrument comprises a shroud and the operation of the surgical instrument is modified based on input from a sensing circuit configured to sense a parameter of the shroud. In certain instances, the surgical instrument comprises a strain gage circuit and the operation of the surgical instrument is modified based on input from the strain gage circuit.

Surgical instrument with a hardware-only control circuit

A surgical instrument is disclosed. The surgical instrument includes an electric motor and a control circuit. The control circuit includes a plurality of logic gates and a monostable multivibrator. The monostable multivibrator is connected to a first one of the logic gates. The control circuit is configured to alter a rate of action of a function of the surgical instrument by controlling a speed of rotation of the electric motor based on a sensed parameter.

Surgical instruments comprising button circuits

A surgical instrument is disclosed comprising an actuator and circuitry mounted on and/or embedded in the actuator.

Fluid ejection device and medical device

A fluid ejection device includes a pulse generation unit that changes the volume of a fluid chamber using a volume changing section to eject pulsating flow; a fluid supply unit including a pump chamber and a pump chamber volume changing section that changes the volume of the pump chamber to supply the fluid to the pulse generation unit; a drive control unit that inputs a pulsating flow drive signal for driving the pump chamber volume changing section and inputs a fluid supply drive signal for driving the fluid supply unit; and an operation command input unit that inputs an operation command to the drive control unit, wherein the fluid supply drive signal and the pulsating flow drive signal are input in conjunction with the input of the operation command.

Automated intraocular lens injector device

An IOL injection device comprises a tubular housing with a plunger longitudinally disposed within the tubular housing. The device is configured so that when the plunger is translated towards the front of the device, its tip engages an intraocular lens insertion cartridge mounted at or near the front end of the housing. The IOL injection device further comprises a control circuit. The control circuit is configured to perform the steps of advancing the plunger to a critical point at which an axial compressive force on the lens suddenly increases, retracting the plunger from the critical point to a sufficient distance for material of the intraocular lens to relax, pausing to allow the material of the intraocular lens to relax, advancing the plunger to the critical point a second time, and continuing to advance the plunger beyond the critical point to implant the intraocular lens.

Method for operating surgical instrument systems

A method for adjusting the operation of a surgical instrument using machine learning in a surgical suite is disclosed.

METHODS AND SYSTEMS FOR LASER OPHTHALMIC SURGERY THAT PROVIDE FOR IRIS EXPOSURES BELOW A PREDETERMINED EXPOSURE LIMIT

A laser surgical method for performing a corneal incision while maintaining iris exposure below a predetermined exposure limit includes: determining an initial iris exposure based on an initial treatment scan, determining whether the initial iris exposure is less than the predetermined exposure limit; generating a revised treatment scan comprising one or more treatment scan modifying elements when the initial iris exposure is greater than the predetermined exposure limit, and scanning the focal zone of a pulsed laser beam according to the revised treatment scan, thereby performing the corneal incision, wherein the one or more treatment scan modifying elements causes the iris exposure to be smaller than the predetermined exposure limit. 1. A system for cataract surgery on an eye of a patient , comprising:a laser assembly for generating a pulsed laser treatment beam;an imaging system configured for imaging an ocular tissue of the patient, the ocular tissue comprising corneal tissue;an optical scanning system configured for positioning the focal zone of the treatment beam to targeted locations of the ocular tissue, the targeting locations including a location in the corneal tissue; anda computer control system operatively coupled to the laser assembly, the imaging system, and the optical scanning system, and programmed to:a) generate a simulated initial treatment scan and calculating an initial indication of exposure level corresponding to the initial treatment scan;b) determine whether the initial indication of exposure level satisfies a predetermined safe exposure condition;c) generate a simulated revised treatment scan comprising one or more treatment scan modifying elements when the initial indication of exposure level fails to satisfy the predetermined safe exposure condition, wherein the one or more treatment scan modifying elements cause a calculated revised indication of exposure level corresponding to the revised treatment scan to satisfy the predetermined ...

Sinusoidal Drive System And Method For Phototherapy

The LEDs in a phototherapy LED pad are controlled so that the intensity of the light varies in accordance with a sinusoidal function, thereby eliminating the harmonics that are generated when the LEDs are pulsed digitally, in accordance with a square-wave function. This is accomplished analogically by using a sinusoidal wave to control the gate of a MOSFET connected in series with the LEDs or by using a digital-to-analog converter to control the gate of the MOSFET with a stair step function representative of the values of a sinusoidal function at predetermined intervals. Alternatively, pulse-width modulation is used to control the gate of the MOSFET in such a way that the average current through the LEDs simulates a sinusoidal function. In additional to using a simple sine wave function, the LED current may also be controlled in accordance with “chords” containing multiple sine waves of different frequencies.

System and Method for Treating Heart Tissue

Some embodiments of a system or method for treating heart tissue can include a control system and catheter device operated in a manner to intermittently occlude a heart vessel for controlled periods of time that provide redistribution of blood flow. In particular embodiments, the system can be configured to provide an estimation of the cumulative effects of the treatment. For example, some embodiments of the system or method can treat myocardium that is at risk of infarction by intermittently altering blood flow in a venous system to induce microcirculation within the myocardium, and can output a cumulative dosage value indicative of a measurement of progress of reducing an infarct size.

LAPAROSCOPIC SURGICAL APPARATUS

A fluid ejection device includes a fluid ejection tube having a forward end nozzle inserted into an abdominal cavity. The fluid ejection tube, accommodated in a cylindrical casing section, is movable in an extending direction. The fluid ejection tube moves in the extending direction, interlocked with a sliding operation of a sealing state switching operation section on the outside of the casing section. Fixed and sliding sealing sections, which seal the inside of the abdominal cavity off from outside, are arranged between the fluid ejection tube and an inner wall surface of the casing section. The fixed and sliding sealing sections shift from a first sealing state with a first airtightness to a second sealing state with a higher airtightness, through movement of the fluid ejection tube by the sealing state switching operation section. The fluid ejection device is electrically drivable when the second sealing state is established. 1. A laparoscopic surgical apparatus comprising:a surgical instrument section that has an extension site having at least a forward end part thereof inserted into an abdominal cavity, and is driven by electric power supplied from outside;a cylindrical accommodation section that accommodates the extension site of the surgical instrument section in such a way that the extension site is movable in an extending direction; andan operation section for causing the extension site of the surgical instrument section to move in the extending direction from outside the accommodation section;wherein a sealing section for sealing an inside of the abdominal cavity off from outside is arranged between the surgical instrument section and the accommodation section,the sealing section is capable of shifting from a first sealing state with a first airtightness to a second sealing state with a higher airtightness than in the first sealing state, through the movement of the extension site by the operation section, andthe surgical instrument section is in an ...

ULTRASOUND PULSE SHAPING

In one embodiment of the present invention, an ultrasound catheter system comprising a catheter having at least one ultrasonic element; and a control system configured to generate power parameters to drive the ultrasonic element to generate ultrasonic energy is provided. The control system is configured to provide an ultrasonic pulse with a high pressure gradient with respect to time and/or distance. In another embodiment, a method of enhancing delivery of a therapeutic compound comprising delivering the therapeutic compound to a treatment site in a patient; and exposing the treatment site to an ultrasonic energy generated by an oscillating electrical signal pattern having a rise or fall rate greater than an sinusoidal pattern for the same amplitude and frequency is provided. 18.-. (canceled)9. A method of enhancing delivery of a therapeutic compound comprising:delivering the therapeutic compound to a treatment site in a patient; andexposing the treatment site to an ultrasonic energy generated by an oscillating electrical signal pattern having a rise and/or fall rate greater than that of a sinusoidal waveform of the same amplitude and fundamental frequency.10. The method of claim 9 , wherein the ultrasonic energy provides pressure waves having increased pressure gradient at a leading edge and/or a trailing edge.11. The method of claim 9 , wherein the oscillating electrical signal pattern comprises an impulse signal.12. The method of claim 9 , therein the oscillating electrical signal pattern comprises a square waveform or a sawtooth waveform.13. The method of claim 9 , wherein delivering the therapeutic compound comprises advancing a catheter comprising a drug delivery lumen to the treatment site; and introducing the therapeutic compound to the treatment site through the drug delivery lumen.14. The method of claim 9 , wherein the therapeutic compound is delivered systematically.15. The method of claim 9 , wherein the ultrasound energy is transmitted from an external ...

Device and methods for delivery of high frequency electrical pulses for non-thermal ablation

The present invention relates to the field of biomedical engineering and medical treatment of diseases and disorders. Methods, devices, and systems for in vivo treatment of cell proliferative disorders are provided. In embodiments, the methods comprise the delivery of high-frequency bursts of bipolar pulses to achieve the desired modality of cell death. More specifically, embodiments of the invention relate to a device and method for destroying aberrant cells, including tumor tissues, using high-frequency, bipolar electrical pulses having a burst width on the order of microseconds and duration of single polarity on the microsecond to nanosecond scale. In embodiments, the methods rely on conventional electroporation with adjuvant drugs or irreversible electroporation to cause cell death in treated tumors. The invention can be used to treat solid tumors, such as brain tumors.

Photoeradication of microorganisms with pulsed purple or blue light

The present invention is directed to a system and method for photoeradication of microorganisms from a target. The method includes the step of obtaining test data for a plurality of experiments each of which comprises irradiating test microorganisms with a plurality of light pulses having a wavelength that ranges from 380 nm to 500 nm. The light pulses have a plurality of pulse parameters (peak irradiance, pulse duration, and off time between adjacent light pulses) and are provided at a radiant exposure that ranges from 0.5 J/cm 2 to 60 J/cm 2 during each of a plurality of irradiation sessions. The test data comprises a survival rate for the test microorganisms after irradiation with the light pulses. The method also includes the step of analyzing the test data to identify the pulse parameters for the light pulses and the radiant exposure for each of the irradiation sessions that result in a desired survival rate for the test microorganisms. The method further includes the step of irradiating the microorganisms of the target with light pulses having the identified pulse parameters at the identified radiant exposure for each of the irradiation sessions so as to photoeradicate all or a portion of the microorganisms.

Transcatheter cardiac de-airing system

Systems and methods for de-airing a cardiac chamber during cardiac surgery are provided. A catheter-based inflatable device is inserted adjacent a target area of the heart, and the frequency of inflation and deflation of the inflatable device is controlled via a remote controller to change the shape of the cardiac chamber to dislodge air bubbles from their deposition site in the cardiac chamber.

LASER PULSE SHAPING TO ENHANCE CONVERSION EFFICIENCY AND PROTECT FIBER OPTIC DELIVERY SYSTEM FOR DISRUPTION OF VASCULAR CALCIUM

A catheter system includes a power source, a controller, and a light guide. The power source generates a plurality of energy pulses. The controller controls the power source so that the plurality of energy pulses cooperate to produce a composite energy pulse having a composite pulse shape. The light guide receives the composite energy pulse. The light guide emits light energy in a direction away from the light guide to generate a plasma pulse away from the light guide. The power source can be a laser and the light guide can be an optical fiber. Each of the energy pulses has a pulse width, and the energy pulses are added to one another so that the composite energy pulse has a pulse width that is longer than the pulse width of any one of the energy pulses. At least two of the energy pulses can have the same wavelength as or a different wavelength from one another. 1. A catheter system for treating a treatment site within or adjacent to a vessel wall or heart valve , the catheter system comprising:a power source that generates a plurality of energy pulses;a controller that controls the power source so that the plurality of energy pulses cooperate to produce a composite energy pulse having a composite pulse shape; anda light guide that receives the composite energy pulse, the light guide emitting light energy in a direction away from the light guide to generate a plasma pulse away from the light guide.2. The catheter system of wherein the power source is a laser.3. The catheter system of wherein the light guide is an optical fiber.4. The catheter system of further comprising an inflatable balloon that encircles a distal end of the light guide.5. The catheter system of wherein each of the energy pulses has a pulse width claim 1 , and the energy pulses are added to one another so that the composite energy pulse has a pulse width that is longer than the pulse width of any one of the energy pulses.6. The catheter system of wherein at least two of the plurality of energy ...

LASER MODULATION FOR COAGULATION

An apparatus has a pump module providing pump energy, a resonator and a controller. The resonator includes a gain medium receiving the pump energy from the pump module and producing light; reflective surfaces reflecting light produced by the gain medium back toward the gain medium; and a variable light attenuator receiving light produced by the gain medium. The controller controls the amount of light attenuated by the variable light attenuator such that the apparatus emits windows of pulses of laser light at spaced time intervals, each window containing a plurality of pulses of laser light and each interval between windows being larger than an interval between pulses within a window. The emitted windows of pulses of laser light heat tissue to a temperature that causes coagulation without vaporization. 120-. (canceled)21. A controller for a laser system comprising:a driver configured to produce a driver signal, the driver having an input for turning the driver signal on and off, the driver signal such that when the driver signal is on a variable light attenuator attenuates more light than when the driver signal is off; anda timer, coupled to the input of the driver for turning the driver signal on and off and applying a timer signal on the input of the driver for turning the driver signal on and off, the timer providing a cyclical timer signal in a first mode of operation and a static timer signal in a second mode of operation, the timer having a frequency input that defines the frequency of the cyclical timer signal and a duration input that defines a length of time that the timer signal turns the driver signal off during the cyclical timer signal, wherein the controller controls the amount of light attenuated by the variable light attenuator such that the apparatus emits windows of pulses of laser light at spaced time intervals, each window containing a plurality of pulses of laser light and each interval between windows being larger than an interval between pulses ...

Detecting short circuits in electrosurgical medical devices

Various embodiments are directed to an electrosurgical systems and methods for providing an electrosurgical signal to a patient. An electrosurgical signal defining a plurality of pulses may be provided to first and second electrodes. A first reading may be received indicating an impedance between the first and second electrodes taken at a first point of a first pulse of the electrosurgical signal. A second reading may indicate the impedance a first point of a second pulse of the electrosurgical signal, where the first point of the first pulse and the first point of the second pulse are at equivalent positions within the first and second pulses. Based on a comparison of the first reading and the second reading, a short circuit may be determined and a signal indicating the short circuit may be generated.

ELECTRICAL ANALYZER ASSEMBLY FOR INTRAVASCULAR LITHOTRIPSY DEVICE

A catheter system for treating a treatment site within or adjacent to a vessel wall or a heart valve includes an energy source, a balloon, an energy guide, and an electrical analyzer assembly. The energy source generates energy. The balloon is positionable substantially adjacent to the treatment site. The balloon has a balloon wall that defines a balloon interior that receives a balloon fluid. The energy guide is configured to receive energy from the energy source and guide the energy into the balloon interior. The electrical analyzer assembly is configured to monitor a balloon condition during use of the catheter system. The electrical analyzer assembly can include a first electrode, a second electrode, and an impedance detector that is electrically coupled to the first electrode and the second electrode. The impedance detector is configured to detect impedance between the first electrode and the second electrode.

Devices, systems and methods for an oscillating crown drive for rotational atherectomy

The present invention is directed in various methods, devices and systems relating to rotational atherectomy. More specifically, an oscillating driver is connected to a drive shaft, or torque transfer tube, with abrasive element mounted thereon. The result provides a rotational working diameter for the rotating abrasive element that is larger than its resting diameter. Generally, the preferred abrasive element is concentric in profile and/or with center of mass collinear with the drive shaft's rotational axis. However, eccentric abrasive elements, both in terms of offsetting center of mass and/or geometric eccentricity may also be employed.

Shockwave catheter system with energy control

A system that breaks calcium in a liquid includes a catheter including first and second electrodes arranged to receive there-across a high electrical voltage at an initial low current. The high electrical voltage causes an electrical arc to form across the electrodes creating a gas bubble within the liquid, a high current to flow through the electrodes, and a mechanical shock wave. A power source provides the electrodes with the high electrical voltage at the initial current and terminates the high electrical voltage in response to the high current flow through the electrodes.

Ultrasound Catheter and Methods for Making and Using Same

Ultrasound catheter devices and methods provide enhanced disruption of blood vessel obstructions. Generally, ultrasound catheters include an elongate flexible catheter body with one or more lumens, an ultrasound transmission member extending longitudinally through the catheter body lumen and, in some embodiments, a guidewire tube extending through the lumen. A distal head for disrupting occlusions is coupled with the distal end of the ultrasound transmission member and is positioned adjacent the distal end of the catheter body. Some embodiments include improved features such as a bend in the catheter body for enhancing positioning and/or advancement of the catheter.

Medical laser system

A medical laser system in accordance with one or more further embodiments includes a crystal-based laser, a power supply for powering the crystal-based laser, a controller operably connected to the crystal-based laser and the power supply, and a memory operably connected to the controller. The controller is programmed to: (a) activate the crystal-based laser to cause a laser light emission by controlling power supplied by the power supply to the laser responsive to a user activation input; and (b) record data in the memory identifying a power level, number of pulses, and duration of the laser light emission.