Abstract: A bipolar surgical instrument (1) comprises a body (2), first and second opposed jaws (18, 20) located at the distal end of a shaft (10), the first jaw (18) being movable with respect to the second jaw (20) between an open position in which the first and second jaws (18, 20) are spaced apart from one another, and a closed position in which the first and second jaws (18, 20) are adjacent one another. The first and second elongate jaw members (18, 20) have respective first and second electrodes. A controller is operable to determine a mode of operation depending upon a measurement of impedance between the first and second jaws.

Abstract: A neural interface circuit for bidirectional signal transmission includes at least one electrode configured to collect a neural signal and receive an excitation signal. The neural interface circuit can transmit signals bidirectionally. On the one hand, neural signals can be collected through electrodes, and on the other hand, excitation signals can be received through electrodes. The excitation signals can achieve the purpose of researching or intervening treatment.

Abstract: The present disclosure relates to electrosurgical systems and methods for controlling electrical treatment energy in connection with electrical arcs. A method in accordance with the present disclosure includes providing electrical treatment energy to an instrument based on an indicated electrical energy level, accessing voltage signal values over time relating to voltage of the electrical treatment energy and/or current signal values over time relating to current of the electrical treatment energy, determining whether an arc generated by the instrument is an arc to be maintained or an arc to be extinguished based on a threshold value and at least one of the voltage signal values or the current signal values, and controlling the electrical treatment energy based on determining that the arc is an arc to be extinguished.

Abstract: A method for estimating a thickness of cardiac tissue undergoing ablation includes the steps of (a) applying a sequence of ablation pulses to a region of the cardiac tissue, so as to create a lesion, and (b) for a given ablation pulse in the sequence, an incremental depth added to the lesion due to the given ablation pulse is estimated. A cumulative depth of the lesion is estimated based on the cumulative depth prior to the given pulse, and on the incremental depth. An amplitude of an electrogram signal at the region is assessed after applying the given ablation pulse, and, if the amplitude exceeds a predefined threshold, an estimate of the thickness is set to be at least the cumulative depth.

Abstract: Methods for the early sensing of tissue ischemia and/or infarctions within organs using the spectroscopic features of serum luminescence include (i) isolating serum from a blood sample, (ii) directing an excitation light at the serum, (iii) receiving an endogenous serum chromophore emission light from the excited serum, and (iv) determining a presence of an ischemic condition based on the intensity of the endogenous serum chromophore emission light. Methods of detecting organ dysfunction can include transmitting excitation light to luminal contents of a mammalian blood vessel comprising trace amounts of exogenous chromophores administered to the subject mammal via the circulatory system. Transdermal luminescence measurements from the trace amounts of exogenous chromophores can then be used to determine organ dysfunction.

Abstract: An apparatus and method for sending test signals to an instrument, and checking the resultant and subsequently arriving echo signals in order to detect specific properties and changes of properties on the line, the instrument, the tissue or also on a fluid body, e.g., plasma body, present on an electrode of the instrument, and to control the operation of the supply arrangement accordingly.

Abstract: A system for controlling a laser treatment, comprising a three dimensional image generator configured to receive three dimensional surface data and to generate a user display of the three dimensional surface data, a user control configured to allow a user to select one or more sections from the user display of the three dimensional surface data and to assign a laser wavelength to the selected section and a robotic treatment device configured to receive the assigned laser wavelength and the selected section and to control a laser device to deliver a laser treatment to the selected section at the assigned laser wavelength.

Abstract: A catheter configured to guide and support a balloon catheter for use in and around a pulmonary vein and its ostium, has an elongated shaft and a distal assembly, the elongated shaft including a proximal portion with a first flexibility and a distal portion including a second flexibility greater than the first flexibility, the distal assembly including an elbow portion and a generally circular portion generally transverse to the longitudinal axis, the generally circular portion including a third flexibility greater than the second flexibility. Single axis location sensors and sensing ring electrodes are carried on the generally circular portion.

Abstract: Control systems and methods for delivery of energy that may include control algorithms that prevent energy delivery if a fault is detected and may provide energy delivery to produce a substantially constant temperature at a delivery site. In some embodiments, the control systems and methods may be used to control the delivery of energy, such as radiofrequency energy, to body tissue, such as lung tissue.

Abstract: Exemplary system, method and computer-accessible medium for determining a characteristic(s) of a tissue(s), can be provided which can include, for example, ablating the tissue(s), illuminating the tissue(s) during the ablation procedure; and continuously determining the characteristic(s) based on the ablation and illumination procedures. The tissue(s) can be ablated using radiofrequency ablation. The illumination procedure can be performed with a radiation in a visible spectrum.

Abstract: Electroporation-based therapies (EBTs) employ high voltage pulsed electric fields (PEFs) to permeabilize tumor tissue, resulting in changes in passive electrical properties detectable using electrical impedance spectroscopy (EIS). Currently, commercial potentiostats for EIS are limited by impedance spectrum acquisition time (˜10 s); this timeframe is much larger than pulse periods used with EBTs (˜1 s). Fourier Analysis SpecTroscopy (FAST) is introduced as a methodology for monitoring tissue inter-burst impedance (diagnostic FAST) and intra-burst impedance (therapeutic FAST) during EBTs. FAST is a rapid-capture (<<1 s) technique which enables monitoring of inter-burst and intra-burst impedance during EBTs in real-time. FAST identified a frequency which delineates thermal effects from electroporation effects in measured impedance. Significance: FAST demonstrates the potential to perform EIS, in addition to intra-burst impedance spectroscopy, using existing pulse generator topologies.

Abstract: An electrosurgical system can include a surgical device configured to adjust energy delivery in accordance with a specified cutting-to-coagulation relationship. The specified cutting-to-coagulation relationship can be determined based at least in part on an impedance or other parameter associated with tissue or an environment at or near the one or more electrodes. The specified cutting-to-coagulation relationship can be determined automatically (e.g., without requiring user input) and adaptively based on the sensing, such as in real-time as the therapy progresses.

Abstract: A method for determining a predicted lesion size formed in a tissue by receiving or calculating a measure of contact force between the electrode and the tissue, determining a tissue characterization, and calculating the predicted lesion size using both the measure of contact force and the tissue characterization. A system comprising an electronic control unit configured to receive or determine a measure of contact force between the electrode and the tissue, characterize the tissue based on both the measure of impedance and the measure of contact force, and cause the tissue characterization to be either (a) presented to a user, or (b) applied to calculate a metric and cause the metric to be presented to the user.

Abstract: The subject technology receives a set of values for a data set corresponding to a request for determining a Pearson correlation. The subject technology determines a number of rows from the data set. The subject technology determines a number of execution nodes to execute the request. The subject technology determines a set of shards of rows from the data set. The subject technology, for each shard from the set of shards, sends a particular user defined table function (UDTF), including a particular shard of rows, to a different execution node to perform a set of operations. The subject technology provides a set of output values of each particular UDTF corresponding to each shard from the set of shards in a second UDTF. The subject technology sends the second UDTF to a particular execution node to perform an aggregate operation using the set of output values of each particular UDTF.

Abstract: Temperature control device for use in fluid-based hyper/hypothermia systems, comprising a connection unit for connecting the device to a local power network, and a fluid temperature control unit for heating or cooling a fluid. The device includes a power supply unit, by which electrical consuming components of the fluid temperature control unit are supplied with power, and which effects supply of the electrical consuming components with direct current.

Abstract: Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Abstract: An electrosurgical system includes an instrument, an RF energy generator, and two ground pads. The instrument includes an electrode and a conductive shield that is configured to collect a capacitive coupling current that is induced by the application of RF energy to tissue by the electrode. A first electrical lead couples the first ground pad with the ground return of the conductive shield and the generator. The ground return is configured to divert a first portion of the capacitive coupling current to the generator via the first electrical lead. A second electrical lead couples the second ground pad with the ground return of the conductive shield and the generator. The ground return is configured to divert a second portion of the capacitive coupling current to the generator via the second electrical lead. The first and second portions of the capacitive coupling current are substantially equal.

Abstract: Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Abstract: An electrosurgical instrument includes an end effector assembly including first and second jaw members. At least one of the first or second jaw members is movable about a pivot relative to the other from a spaced-apart position to an approximated position to grasp tissue between first and second opposed surfaces of the first and second jaw members, respectively. The electrosurgical instrument further includes an interface configured to provide a feedback related to a size of tissue grasped by the first and second jaw members. At least one of the first or second jaw members includes a touch sensor configured to sense a touch span where the tissue touches the at least one of the first or second opposed surfaces. The end effector assembly further includes an angle sensor configured to sense an angle ? about the pivot between the first and second opposed surfaces.

Abstract: A bipolar ablation device for treatment of a stenosis within an implanted metallic stent may include an elongate shaft slidably disposable within an endoscope, the elongate shaft including at least one electrode configured to form a first pole of the bipolar ablation device, and an electrode lead slidably disposable within the endoscope. The electrode lead may be configured to electrically engage the implanted metallic stent to form a second pole of the bipolar ablation device. The elongate shaft may be positionable within a lumen of the implanted metallic stent.

Abstract: A graphical representation may be displayed including at least a plurality of transducer graphical elements, each transducer graphical element of the plurality of transducer graphical elements representative of a respective transducer of a plurality of transducers of a transducer-based device. A set of user input may be received including an instruction set to reposition a first transducer graphical element in a state in which the first transducer graphical element is located at a first location in the graphical representation and a second transducer graphical element is located at a second location in the graphical representation, the second location closer to a predetermined location in the graphical representation than the first location. In response to conclusion of receipt of the set of user input, the first transducer graphical element may be repositioned from the first location in the graphical representation to the predetermined location in the graphical representation.

Abstract: A medical system for ablating a tissue site by electroporation with real-time pulse monitoring during an electroporation treatment procedure is provided. The treatment control module monitors applied pulses and detect an abnormal condition that indicates either an ineffective electroporation of the tissue or an imminent excessive current such as a spark event that may exceed the capacity of the pulse generator. Rather than terminating the procedure entirety, the treatment control module temporarily pauses the procedure to allow the user to adjust the pulse parameters so as to complete the procedure without starting the procedure over again.

Abstract: A method of automatically assigning foot pedals of a robotic surgical system to surgical instruments of a surgical robot of the robotic surgical system includes: receiving a signal that a first electrosurgical pedal is actuated; determining a number of electrosurgical instruments connected to the surgical robot in response to actuation of the first electrosurgical foot pedal; assigning the first electrosurgical foot pedal to a first electrosurgical instrument connected to the surgical robot after the first electrosurgical foot pedal is actuated; and delivering electrosurgical energy to the first electrosurgical instrument in response to actuation of the first electrosurgical foot pedal after assigning the first electrosurgical foot pedal to the first electrosurgical instrument.

Abstract: The invention generally relates to systems and methods for improving sleep by treating at least one of rhinitis, congestion, and/or rhinorrhea to thereby reduce or eliminate symptoms associated therewith, including, but not limited to, nasal congestion, coughing, sneezing, and nasal or throat irritation and itching.

Abstract: A generator includes first, second, and third inductors and a capacitor. The first inductor is formed by a primary coil of a transformer. The second inductor is formed by a first secondary coil of the transformer. The second inductor is connected between a first contact and a second contact. The first and the second contacts are connected to a surgical instrument. The third inductor is formed by a second secondary coil of the transformer continuously connected to the first secondary coil. The third inductor is connected between the second contact and a third contact. A polarity of the second contact with respect to the third contact coincides with a polarity of the first contact with respect to the second contact of the second inductor. The capacitor is connected between the third contact and ground. An inductance of the third inductor and a capacitance of the capacitor are adjusted.

Abstract: An electrosurgical system is provided and includes a bipolar electrosurgical instrument and an electrosurgical generator. The bipolar electrosurgical instrument is arranged to seal and cut tissue captured between jaws of the instrument. The jaws include particularly positioned, shaped and/or oriented electrodes to perform the sealing of tissue. The electrosurgical generator is arranged to supply RF energy through the instrument, monitor the supplied RF energy and adjust or terminate the supplied RF energy to optimally seal the tissue.

Abstract: Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Abstract: Provided herein are catheter devices, systems, and methods to ablate a tissue location. The devises, systems, and methods disclosed herein include ablation systems including a catheter system with inner and outer shafts that deliver an ablation medium (e.g., a cryogenic ablation medium) to a body lumen and evacuate the ablation medium from the body lumen. In some embodiments, devices, systems, and methods disclose herein include expandable structures that facilitate in positioning of nozzles and/or evacuation of ablation medium from a body lumen.

Abstract: Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Abstract: A surgical device having an apparatus with a generator and an instrument supplied by a generator. A sensor is part of the device that is attached to the patient, for example to an extremity thereof, during surgery to detect the movement of the patient. The sensor is connected with a control device that modifies the operation of generator and particularly switches the generator off, if the sensor detects a movement of the patient exceeding a threshold. Injuries of patient that could occur by involuntary twitches during surgery process are thus avoided.

Abstract: Devices and methods for tissue lesion assessment and/or creation based on dielectric properties are disclosed. In some embodiments, one or more probing frequencies are delivered via electrodes including an electrode in proximity to a tissue (for example, myocardial tissue). Measured dielectric properties (such as impedance properties), optionally together with other known and/or estimated tissue characteristics, are used to determine the lesion state of the tissue. In some embodiments, a developing lesion state is monitored during treatment formation of a lesion (for example, ablation of heart tissue to alter electrical transmission characteristics).

Abstract: The present disclosure provides a system for planning electric field cancer treatment based on absorbed energy including: an image classification unit to classify a patient's medical image into an organ and a tumor; a property information setting unit to set property information for each region classified by the image classification unit; a prescription information determination unit to set a prescription method; a dose calculation unit to initially set the number and location of electrodes used for electric field cancer treatment and the electric field intensity for each electrode; and a dose optimization unit to optimize the dose by changing at least one electrode.

Abstract: A system, method and leak signal discriminator for detection of a leak or mechanical breach in a catheter shaft in the presence of an electrical interferer are disclosed. According to one aspect, a leak signal discriminator having a leak detection circuit is configured to distinguish between a leak signal arising from a leak in a catheter and an interfering signal arising from an electrical interferer. The leak signal discriminator includes circuitry configured to receive from the leak detection circuit a response signal responsive to a test signal the test signal having component signals, each component signal being at a different frequency, and distinguish between a leak and an electrical interferer based at least in part on an evaluation of the response signal.

Abstract: An electrosurgical instrument has a power supply operatively coupled to an end effector. The end effector has a pair of jaws for effectuating an action on tissue positioned therebetween. The power supply is configured to input a first signal and a second signal to a buck-boost converter. The buck-boost converter is configured to transmit an output to an H-bridge circuit. The H-bridge circuit is configured to pass a signal to a resonant LC transformer circuit. The power supply is configured to transmit a power signal. The pair of jaws are operatively coupled to the power supply to receive the power signal, the power having no more than 80 Volts RMS, and less than 2 Amps RMS. The power is configured to seal the tissue positioned between the pair of jaws in 3 seconds or less.

Abstract: An apparatus is provided, where the apparatus includes a plurality of components; a first sensing system to measure first power consumed by first one or more components of the plurality of components; a second sensing system to measure second power consumed by the apparatus; an analog-to-digital converter (ADC) to generate an identification (ID) that is representative of the second power consumed by the apparatus; and a controller to allocate power budget to one or more components of the plurality of components, based on the measurement of the first power and the ID.

Abstract: A controller for an electrosurgical generator includes an RF inverter, a signal processor, a software compensator, a hardware compensator, and an RF inverter controller. The RF inverter generates an electrosurgical waveform and the signal processor outputs a measured value of at least one of a voltage, a current, or power of the electrosurgical waveform. The software compensator generates a desired value for at least one of the voltage, the current, or the power of the electrosurgical waveform, and the hardware compensator generates a phase shift based on the measured value and the desired value. The RF inverter controller generates a pulse-width modulation (PWM) signal based on the phase shift to control the RF inverter.

Abstract: An electrosurgical system is provided and includes an electrosurgical instrument and an electrosurgical generator. The electrosurgical system obtains information about the tissue undergoing a sealing process in order to calculate information about the tissue undergoing the sealing process and, in real-time, modify the RF energy being provided to the electrosurgical instrument from the electrosurgical generator. In this way, the electrosurgical system manages the supply of RF energy to optimally seal different types of tissue. The electrosurgical instrument is configured to seal the tissue using the RF energy.

Abstract: A power controller device and system allows verification, monitoring, and control of an arteriovenous (AV) fistula creation catheter which comprises a main housing having a power supply, an embedded electronic controller and a user interface display, and which is configured to allow connection to an intravascular catheter. When activated, the device verifies that a valid catheter is connected, downloads stored manufacturing calibration data from the catheter, and provides a user interface to allow initiation of AV fistula creation. Once creation of the AV fistula is initiated, the device provides closed loop control of the catheter heating element and provides a means of monitoring the catheter temperature and tip position to a prescribed parameter to automate the arteriovenous fistula creation procedure.

Abstract: A high-frequency generator connects an electrosurgical instrument, including an electrical output connection point for an electrosurgical instrument, a power supply, which is at least indirectly connected to the output connection point, and a power controller for controlling the electrical output power output via the output connection point. The power controller is designed to begin the output of an electrical output power when an output energy balance amount is greater than an output energy limit value and to end the output of the electrical output power when the output energy balance amount falls below a minimum value.

Abstract: A system is configured to delivering radiofrequency power to the endometrial lining tissue of a uterine cavity, including modulating the delivered power so that a measured impedance of the endometrial lining tissue tracks a target impedance as a function of time, wherein the target tissue impedance is derived from a function that approximates a preferred endometrial lining tissue ablation impedance curve that is determined based upon a measured impedance of the endometrial lining tissue after RF power has been delivered for a predetermined initial time period.

Abstract: Methods and systems utilizing inferred maximum temperature monitoring for irrigated ablation therapy are described herein. In one embodiment, a method for ablating tissue includes positioning an elongate body proximate to tissue, where the elongate body includes an ablation element and at least one temperature sensor coupled thereto. The method can include simultaneously delivering ablative energy to the tissue through the ablation element and liquid through the elongate body. The method can further include pausing delivery of ablative energy and liquid, as well as sensing a temperature of the ablation element while delivery of ablative energy and liquid is paused. The method can further include any of terminating delivery of ablative energy and liquid and resuming delivery of ablative energy and liquid based on a comparison of the sensed temperature to a reference temperature.

Abstract: Various embodiments are directed to a method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument. The method comprises generating at least one electrical signal. The at least one electrical signal is monitored against a first set of logic conditions. A first response is triggered when the first set of logic conditions is met. A parameter is determined from the at least one electrical signal.

Abstract: Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Abstract: Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Abstract: Systems and methods for enhancing surgical outcomes by providing generators having optimal RF output for sealing, fusing and/or cutting tissue or vessels under all dynamic conditions are described. Examples of dynamic conditions may include varying tissue impedance load due to electrosurgical operations or tissue affects, any operational conditions and commands determined by the surgeon, surgical procedure and/or device script. This is achieved by implementing a digital closed-loop control system within the electrosurgical generator to regulate voltage, current, and power of the RF output. The digital closed-loop control system may include an RF amplifier for generating RF energy, a feedback system for constantly monitoring the electrical characteristics, e.g.

Abstract: Disclosed are methods and compositions for preventing or disrupting mitosis of pluripotent stem cells, killing pluripotent stem cells, preventing or disrupting division of pluripotent stem cells, reducing the viability of pluripotent stem cells, slowing the progression or differentiation of pluripotent stem cells, and treating an ectopic pregnancy.

Abstract: A method of controlling the application of energy to a radio frequency (RF) instrument based on a surgical technique may include activating the instrument for a first period T1, during which time a portion of an end effector contacts a tissue, plotting at least two electrical parameters associated with the tissue to classify an amount of the end effector in contact with the tissue, applying a classification algorithm to classify the amount of the end effector in contact with the tissue, and applying an amount of energy to the end effector based on the amount of the end effector in contact with the tissue. The parameters may include a minimum impedance of the tissue and an amount of time that the impedance slope is ˜0. The end effector may contact the tissue with a tip end or with an entire surface.

Abstract: An electrosurgical generator includes: a power supply configured to output a DC waveform; a power converter coupled to the power supply and configured to generate a radio frequency waveform based on the DC waveform; an active terminal coupled to the power converter and configured to couple to a first electrosurgical instrument and a second electrosurgical instrument; at least one sensor coupled to the power converter and configured to sense at least one property of the radio frequency waveform; and a controller coupled to the power converter. The controller is configured to: determine a first impedance associated with a first electrosurgical instrument and a second impedance associated with a second electrosurgical instrument based on the at least one property of the radio frequency waveform; and adjust at least one parameter of the radio frequency waveform based on the first impedance and the second impedance.

Abstract: A surgical instrument is disclosed. The surgical instrument comprises an end effector comprising an ultrasonic blade and a clamp arm. The clamp arm is movable relative to the ultrasonic blade to transition the end effector between an open configuration and a closed configuration to clamp tissue between the ultrasonic blade and the clamp arm. The surgical instrument further comprises a transducer configured to generate an ultrasonic energy output and a waveguide configured to transmit the ultrasonic energy output to the ultrasonic blade. The surgical instrument further comprises a control circuit configured to monitor a parameter of the surgical instrument, wherein crossing an upper predetermined threshold of the parameter causes the control circuit to effect a first electromechanical system, and wherein crossing a lower predetermined threshold of the parameter causes the control circuit to effect a second electromechanical system different than the first electromechanically system.

Abstract: 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.