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Title:
SYSTEM FOR OPTIMIZING TISSUE TREATMENT USING FLUID CONTROL
Document Type and Number:
WIPO Patent Application WO/2024/057203
Kind Code:
A1
Abstract:
A system for treating tissue with electrosurgical energy includes an electrosurgical device having a housing including an elongated shaft extending therefrom. An end effector is operably coupled to a distal end of the elongated shaft, the end effector including a treatment portion adapted to electrically couple to a source of electrosurgical energy such that, upon activation thereof, the treatment portion treats tissue in contact therewith at a treatment site. A pump supplies irrigation fluid from an irrigation source to the treatment site. A pump control algorithm is configured to regulate the flow of irrigation fluid to the treatment site based on one or more electrical feedback parameters from the tissue treatment portion during activation to optimize a desired tissue effect.

Inventors:
DUNNING JAMES E (US)
Application Number:
PCT/IB2023/059029
Publication Date:
March 21, 2024
Filing Date:
September 12, 2023
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
COVIDIEN LP (US)
International Classes:
A61B18/12; A61B18/14
Foreign References:
US20030216733A12003-11-20
EP1429678A12004-06-23
US20140336630A12014-11-13
US20220039857A12022-02-10
Attorney, Agent or Firm:
ESPENSCHIED, Douglas et al. (US)
Download PDF:
Claims:
Attorney Docket: A0008639WO01 WHAT IS CLAIMED IS: 1. A system for treating tissue with electrosurgical energy, comprising: an electrosurgical device including a housing having an elongated shaft extending therefrom; an end effector operably coupled to a distal end of the elongated shaft, the end effector including a treatment portion adapted to electrically couple to a source of electrosurgical energy such that, upon activation thereof, the treatment portion treats tissue in contact therewith at a treatment site; a pump configured to supply irrigation fluid from an irrigation fluid source to the treatment site; and a pump control algorithm configured to regulate the flow of irrigation fluid to the treatment site based on at least one electrical feedback parameter from the tissue treatment portion during activation to optimize a desired tissue effect. 2. The system for treating tissue with electrosurgical energy according to claim 1, wherein the at least one electrical feedback parameter from the tissue treatment portion during activation includes current, rms voltage, peak voltage, crest factor, temperature, impedance, and phase. 3. The system for treating tissue with electrosurgical energy according to claim 1, wherein the at least one electrical feedback parameter from the tissue treatment portion during activation includes rate of change in voltage or rate of change in current. 4. The system for treating tissue with electrosurgical energy according to claim 1, wherein the irrigation fluid is saline. 5. The system for treating tissue with electrosurgical energy according to claim 1, further comprising a control algorithm operably coupled to the source of electrosurgical energy configured to cooperate with the pump control algorithm to adjust output power from the electrosurgical Attorney Docket: A0008639WO01 energy source to maximize the applied power to the treatment portion while minimizing tissue impedance to achieve the desired tissue effect. 6. The system for treating tissue with electrosurgical energy according to claim 5, wherein the control algorithm is configured to detect voltage or temperature spikes from the tissue treatment portion indicative of sparking and potential tissue charring during certain tissue treatments. 7. The system for treating tissue with electrosurgical energy according to claim 1, wherein the electrosurgical device is selected from a group consisting of forceps, pencils, coagulators, and sealers. 8. The system for treating tissue with electrosurgical energy according to claim 1, wherein the electrosurgical device is selected from bipolar and monopolar electrosurgical devices. 9. The system for treating tissue with electrosurgical energy according to claim 1, further comprising a fluid line operably coupled to the end effector proximate the treatment site. 10. The system for treating tissue with electrosurgical energy according to claim 1, further comprising a fluid channel operably defined through the elongated shaft and including an opening for dispensing the fluid proximate the treatment site. 11. A system for treating tissue with electrosurgical energy, comprising: an electrosurgical forceps including: a housing having an elongated shaft extending therefrom; an end effector operably coupled to a distal end of the elongated shaft, the end effector including opposing jaw members moveable to grasp tissue therebetween; a source of electrosurgical energy operably coupled to at least one of the jaw members and configured to supply electrosurgical energy to tissue upon activation thereof; Attorney Docket: A0008639WO01 a pump is configured to supply irrigation fluid from an irrigation source to an area proximate the at least one jaw member; and a pump control algorithm configured to regulate the flow of irrigation fluid to the at least one jaw member based on at least one electrical feedback parameter from the at least one jaw member during activation to optimize a desired tissue effect. 12. The system for treating tissue with electrosurgical energy according to claim 11, wherein the at least one electrical feedback parameter from the tissue treatment portion during activation includes current, rms voltage, peak voltage, crest factor, impedance, and phase. 13. The system for treating tissue with electrosurgical energy according to claim 11, wherein the at least one electrical feedback parameter from the tissue treatment portion during activation includes rate of change in voltage or rate of change in current. 14. The system for treating tissue with electrosurgical energy according to claim 11, wherein the irrigation fluid is saline. 15. The system for treating tissue with electrosurgical energy according to claim 11, further comprising a control algorithm operably coupled to the source of electrosurgical energy configured to cooperate with the pump control algorithm to adjust output power from the electrosurgical energy source to maximize the applied power to the treatment portion while minimizing tissue impedance to achieve the desired tissue effect.
Description:
Attorney Docket: A0008639WO01 SYSTEM AND METHOD FOR OPTIMIZING TISSUE TREATMENT USING FLUID CONTROL FIELD OF THE INVENTION [0001] The present disclosure relates to electrosurgical systems and methods of treating tissue and, more particularly, the present disclosure relates to electrosurgical systems and methods for the treatment of body tissues using a control algorithm that regulates the flow of irrigation fluid to the treatment site to optimize the impedance range for a desired tissue treatment. BACKGROUND OF THE INVENTION [0002] Electrosurgical instruments use radio frequency (RF) energy, to coagulate, cut, desiccate, seal, ablate, or cauterize blood vessels or other tissue structures depending upon a particular surgical need. RF energy delivered to tissue can be unpredictable depending upon tissue type and surgical environment and, typically, the generator monitors the RF delivery during the tissue treatment to within an acceptable range. For example, many RF generators can be set to different modes which correspond to different waveforms which, in turn, cause different tissue reaction at the end effector or treatment portion, e.g., cut, ablate, coagulate, seal, etc. Moreover, the power levels may be varied prior to or during delivery to enhance a desired surgical effect. [0003] However, during actual tissue treatment, the true power delivered to the tissue may vary significantly over the course of the tissue treatment since power is directly proportional to tissue impedance. For example, during surgery, as the treatment device heats, tissue build-up occurs, tissue eschar builds, surgical environments become wet, the impedance of the tissue may change as tissue varies or the power delivery from the treatment device may become less efficient, etc., all resulting in variations in voltage and current levels. Or, for example, when treating multiple tissue types with the same instrument, voltage and current levels may be particularly tenuous to manage, and a surgeon is typically reliant on a generator control algorithm. In view thereof, there exists a need to control the voltage and current levels during tissue treatment to maintain a desired impedance range to enhance a tissue effect. Attorney Docket: A0008639WO01 SUMMARY [0004] Provided in accordance with the present disclosure is a system for treating tissue with electrosurgical energy which includes an electrosurgical device having a housing with an elongated shaft extending therefrom. An end effector is operably coupled to a distal end of the elongated shaft, the end effector including a treatment portion adapted to electrically couple to a source of electrosurgical energy such that, upon activation thereof, the treatment portion treats tissue in contact therewith at a treatment site. A pump is configured to supply irrigation fluid from an irrigation fluid source to the treatment site. A pump control algorithm is configured to regulate the flow of irrigation fluid to the treatment site based on one or more electrical feedback parameters from the tissue treatment portion during activation to optimize a desired tissue effect. [0005] In aspects according to the present disclosure, the one or more electrical feedback parameters from the tissue treatment portion during activation includes current, rms voltage, peak voltage, crest factor, impedance, and phase. [0006] In aspects according to the present disclosure, the one or more electrical feedback parameters from the tissue treatment portion during activation includes rate of change in voltage or rate of change in current. [0007] In aspects according to the present disclosure, the irrigation fluid is saline. [0008] In aspects according to the present disclosure, the system further includes a control algorithm operably coupled to the source of electrosurgical energy configured to cooperate with the pump control algorithm to adjust output power from the electrosurgical energy source to maximize the applied power to the treatment portion while minimizing tissue impedance to achieve the desired tissue effect. In other aspects according to the present disclosure, the control algorithm is configured to detect voltage spikes from the tissue treatment portion indicative of sparking and potential tissue charring during certain tissue treatments. [0009] In aspects according to the present disclosure, the electrosurgical device is selected from a group consisting of forceps, pencils, coagulators, and sealers. [0010] In aspects according to the present disclosure, the electrosurgical device is selected from bipolar and monopolar electrosurgical devices. Attorney Docket: A0008639WO01 [0011] In aspects according to the present disclosure, the system further includes a fluid line operably coupled to the end effector proximate the treatment site. [0012] In aspects according to the present disclosure, the system further includes a fluid channel operably defined through the elongated shaft and including an opening for dispensing the fluid proximate the treatment site. [0013] Provided in accordance with the present disclosure is a system for treating tissue with electrosurgical energy which includes an electrosurgical forceps, the electrosurgical forceps including: a housing having an elongated shaft extending therefrom; and an end effector operably coupled to a distal end of the elongated shaft, the end effector including opposing jaw members moveable to grasp tissue therebetween. The system further including: a source of electrosurgical energy operably coupled to one or both of the jaw members and configured to supply electrosurgical energy to tissue upon activation thereof; a pump configured to supply irrigation fluid from an irrigation source to an area proximate the one or both jaw members; and a pump control algorithm configured to regulate the flow of irrigation fluid to the one or both jaw members based on one or more electrical feedback parameters from the one or both jaw members during activation to optimize a desired tissue effect. [0014] In aspects according to the present disclosure, the one or more electrical feedback parameters from the tissue treatment portion during activation includes current, rms voltage, peak voltage, crest factor, impedance, and phase. [0015] In aspects according to the present disclosure, the one or more electrical feedback parameters from the tissue treatment portion during activation includes rate of change in voltage or rate of change in current. [0016] In aspects according to the present disclosure, the irrigation fluid is saline. [0017] In aspects according to the present disclosure, the system further includes a control algorithm operably coupled to the source of electrosurgical energy configured to cooperate with the pump control algorithm to adjust output power from the electrosurgical energy source to maximize the applied power to the treatment portion while minimizing tissue impedance to achieve the desired tissue effect. Attorney Docket: A0008639WO01 BRIEF DESCRIPTION OF DRAWINGS [0018] The above and other aspects and features of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings wherein like reference numerals identify similar or identical elements. [0019] FIG.1A is a schematic illustration of a monopolar electrosurgical system provided in accordance with aspects of the present disclosure shown in use treating tissue of a patient; [0020] FIG. 1B is a schematic illustration of a bipolar electrosurgical system provided in accordance with aspects of the present disclosure shown in use treating tissue of a patient; [0021] FIG.2 is a front view of the electrosurgical generator of the systems of FIGS.1A and 1B; [0022] FIG.3 is a block diagram of the electrosurgical generator of the systems of FIG.1A and 1B; [0023] FIG. 4A is a block diagram of the monopolar electrosurgical system of FIG. 1A operably coupled to a pump; [0024] FIG.4B is an enlarged view of an electrosurgical device of the system of FIG.4A; [0025] FIG.5A is a block diagram of the bipolar electrosurgical system of FIG.1A operably coupled to a pump; and [0026] FIG.5B is an enlarged view of an electrosurgical device of the system of FIG.5A. DETAILED DESCRIPTION [0027] The present disclosure provides electrosurgical systems and methods facilitating monopolar and/or bipolar electrosurgical tissue treatment. [0028] Referring to FIG.1A, a monopolar electrosurgical system provided in accordance with aspects of the present disclosure is shown generally identified by reference numeral 100. Monopolar electrosurgical system 100 is configured to selectively apply monopolar electrosurgical energy, e.g., monopolar radio frequency (RF) energy, to target tissue of a patient “P.” System 100, more specifically, includes a monopolar electrosurgical device 120, a return electrode device 130, and an electrosurgical generator 200. Monopolar electrosurgical device 120 includes at least one active electrode 122 configured to supply energy to tissue of a patent “P.” Monopolar electrosurgical instrument 120 may be, for example, a monopolar electrosurgical pencil, a Attorney Docket: A0008639WO01 monopolar electrosurgical knife, a monopolar electrode loop, a monopolar electrode of a multi- function device, a monopolar ablation device, a surgical robotic monopolar end effector, or any other suitable device including an active electrode 122 configured to supply energy to tissue of a patient “P.” Monopolar electrosurgical device 120 further includes an electrosurgical cable 124 having a plug (not explicitly shown) configured to connect active electrode 122 to an active monopolar port 250 of electrosurgical generator 200. Return electrode device 130 likewise includes an electrosurgical cable 134 having a plug (not explicitly shown) configured to connect to a return monopolar port 252 of electrosurgical generator 200. In this manner, monopolar electrosurgical energy can be supplied from electrosurgical generator 200 to active electrode 122 for application to tissue and return to electrosurgical generator 200 via return device 130. [0029] Monopolar electrosurgical device 120 also includes one or more activation controls 128 disposed thereon. Alternatively, or additionally, one or more activation controls may be disposed on a remote activation device, e.g., a footswitch, on electrosurgical generator 200, or otherwise provided to facilitate activation and/or control of monopolar electrosurgical device 120. Each of the one or more activation controls 128 may be configured as a push button, slider, toggle switch, dial, trigger, virtual button, touch-screen interface, etc. Each of the one or more activation controls 128 is configured to connect to electrosurgical generator 200, e.g., via one or more wires extending through cable 124 to enable a surgeon to selectively activate and/or control monopolar electrosurgical device 120. Further, each of the one or more activation controls 128 may be configured to enable at least one of: activation of the supply of energy to active electrode 122, deactivation of the supply of energy to active electrode 122, selection of a mode of operation, selection of a power level, etc. [0030] System 100 may be utilized to supply monopolar electrosurgical energy to tissue, for example, to coagulate, ablate or cut tissue, although other tissue treatments are also contemplated. Further, monopolar electrosurgical device 120 may be configured to operate in a plurality of different modes corresponding to different power levels, different tissue treatments, different types of tissue to be treated, different surgical techniques utilized, different surgical conditions, etc. [0031] Turning to FIG. 1B, a bipolar electrosurgical system provided in accordance with aspects of the present disclosure is shown generally identified by reference numeral 150. Bipolar Attorney Docket: A0008639WO01 electrosurgical system 150 is configured to selectively apply bipolar electrosurgical energy to target tissue of a patient “P.” System 150 includes a bipolar electrosurgical device 160 and electrosurgical generator 200. Bipolar electrosurgical device 160 may be, for example, a bipolar electrosurgical forceps (as detailed herein), although other suitable bipolar electrosurgical devices are contemplated such as, for example, bipolar electrosurgical probes, bipolar electrosurgical resection loops, bipolar electrosurgical scissors, surgical robotic bipolar end effectors, etc. Bipolar electrosurgical device 160 includes opposing first and second jaw members 162, 164 including first and second electrodes 163, 165, respectively. First and second electrodes 163, 165 are configured to connect to bipolar port 258 of electrosurgical generator 200 by way of a cable 170 having a plug (not explicitly shown) and including first and second electrode leads 172, 174 that connect to respective first and second electrodes 163, 165. First and second electrode leads 172, 174 are electrically isolated from one another and connect to different pins of the plug of cable 170 to thereby connect to the active and return terminals of bipolar port 258 of electrosurgical generator 200. In this manner, bipolar electrosurgical energy is supplied from electrosurgical generator 200 to bipolar electrosurgical device 160 via cable 170, conducted between first and second electrodes 163, 165 and through tissue, e.g., tissue grasped between first and second jaw members 162, 164, and is returned to electrosurgical generator 200 via cable 170. [0032] Bipolar electrosurgical device 160 also includes one or more activation controls 178 disposed thereon. Alternatively, or additionally, one or more activation controls may be disposed on a remote activation device, e.g., a footswitch, on electrosurgical generator 200, or otherwise provided to facilitate activation and/or control of bipolar electrosurgical device 160. Each of the one or more activation controls 178 may be configured as a push button, slider, toggle switch, dial, trigger, virtual button, touch-screen interface, etc. Each of the one or more activation controls 178 is configured to connect to electrosurgical generator 200, e.g., via one or more wires extending through cable 170 to enable a surgeon to selectively activate and/or control bipolar electrosurgical device 160. Further, each of the one or more activation controls 178 may be configured to enable at least one of: activation of the supply of energy to bipolar electrosurgical device 160, deactivation of the supply of energy to bipolar electrosurgical device 160, selection of a mode of operation, selection of a power level, etc. Attorney Docket: A0008639WO01 [0033] System 150 may be utilized to supply bipolar electrosurgical energy to tissue, for example, to coagulate, ablate, seal or cut tissue, although other tissue treatments are also contemplated. Further, bipolar electrosurgical device 160 may be configured to operate in a plurality of different modes corresponding to different power levels, different tissue treatments, different types of tissue to be treated, different surgical techniques utilized, different surgical conditions, etc. [0034] Turning to FIG. 2, a front face 240 of electrosurgical generator 200 is shown. Electrosurgical generator 200 may include a plurality of ports 250-262 to accommodate various types of electrosurgical instruments (e.g., monopolar electrosurgical device 120, bipolar electrosurgical device 160, etc.) and/or accessories (e.g., foot switches, remote User Interfaces (UI’s), communication hubs, robotic systems, etc.). One or more of ports 250-262 may include a detection device configured to read information stored or otherwise encoded on the plugs of instruments connected thereto (e.g., the plugs of cables 130, 170 of devices 120, 150 (FIGS.1A and 1B, respectively)) to obtain identifying information, authentication information, use information, and/or operating parameters of the instruments connected to electrosurgical generator 200, thus enabling electrosurgical generator 200 to selectively enable and configure energy delivery and energy delivery settings based on the connected instrument(s). Such detection devices may be configured to read information from bar codes, electrical components (e.g., resistors, capacitors, etc.), RFID chips, magnets, non-transitory storage (e.g., non-volatile memory, EEPROM, etc.), etc., which may be coupled to or integrated into the plugs of the instruments. Suitable detection devices include, for example, bar code readers, electrical sensors, RFID readers, Hall Effect sensors, memory readers, and/or any other suitable decoders configured to read information. [0035] Continuing with reference to FIG.2, electrosurgical generator 200 includes one or more display screens 242, 244, 246 for providing the user with variety of output information (e.g., activation settings, mode settings, intensity settings, treatment complete indicators, feedback information (e.g., tissue impedance), etc.). Each of screens 242, 244, 246 may be associated with a corresponding port 250-262 or ports 250-262. Electrosurgical generator 200 further includes suitable activation controls (e.g., buttons, activators, switches, touch screen, etc.) for controlling Attorney Docket: A0008639WO01 electrosurgical generator 200 and/or the instruments connected thereto. The display screens 242, 244, 246 may further be configured as touch screens that display a corresponding menu for the electrosurgical instrument(s) connected to electrosurgical generator, thereby facilitating selection of settings and/or modes of operation for those particular instrument(s). [0036] Ports 250-262 may include, for example: one or more active monopolar device ports 250, 256 each configured to receive a plug of a monopolar electrosurgical device, e.g., monopolar electrosurgical device 120 (FIG.1A); a return monopolar device port 254 configured to receive a plug of a monopolar electrosurgical return device, e.g., return device 130 (FIG. 1A); an input device port 252, e.g., such as for a footswitch with a monopolar device; a bipolar device port 258 configured to receive a plug of a bipolar electrosurgical device, e.g., bipolar electrosurgical device 160 (FIG.1B); first and second vessel sealing ports 260, 262 each configured to receive a plug of a vessel sealing device; and/or any other suitable ports. [0037] Turning to FIG. 3, electrosurgical generator 200 includes sensor circuitry 272, a controller 274, a high voltage DC power supply (“HVPS”) 277 and an RF output stage 278. HVPS 277 provides high voltage DC power to RF output stage 278 which converts the high voltage DC power into RF energy for delivery to the active connected device, e.g., monopolar electrosurgical device 120 (FIG. 1A) or bipolar electrosurgical device 160 (FIG. 1B). In particular, RF output stage 278 generates waveforms of high frequency RF energy. RF output stage 278 is configured to generate a plurality of waveforms having various duty cycles, peak voltages, crest factors, and other parameters, depending on particular settings and/or modes of operation. With respect to outputting monopolar energy, e.g., to active electrode 122 of monopolar electrosurgical device 120 (FIG.1A), RF output stage 278 is configured to output the high frequency RF energy to cable 124 for delivery to active electrode 122 (see FIG.1A) while energy is returned via cable 134 of return device 130 (FIG. 1A). With respect to outputting bipolar energy, e.g., to electrodes 163, 165 of bipolar electrosurgical device 160 (FIG.1B), RF output stage 278 is configured to output the high frequency RF energy to leads 172, 174 of cable 170 of bipolar electrosurgical device 160 (FIG. 1B). [0038] Controller 274 includes a microprocessor 275 (or other suitable processor such as, for example, a digital signal processor, an ASIC, a graphics processing unit (GPU), a field- Attorney Docket: A0008639WO01 programmable gate array (FPGA), or a central processing unit (CPU)) operably connected to a memory 276 which may be volatile type memory (e.g., RAM) and/or non-volatile type memory (e.g., flash media, disk media, etc.). Microprocessor 275 is operably connected to HVPS 277 and/or RF output stage 278 allowing microprocessor 275 to control the output of electrosurgical generator 200, e.g., in accordance with feedback received from sensor circuitry 272. Sensor circuitry 272 is operably coupled to the energy supply leads that supply energy to/from tissue, e.g., to/from monopolar electrosurgical device 120 and return device 130 in monopolar configurations (FIG. 1A) and to/from electrodes 163, 165 of bipolar electrosurgical device 160 (FIG. 1B) in bipolar configurations. [0039] From these leads and, more specifically, the signals transmitted therealong, sensor circuitry 272 may determine one or more parameters, e.g., tissue impedance, current, voltage, and/or power, etc. Sensor circuitry 272 provides feedback, e.g., based on the sensed parameter(s), to controller 274 which, in turn, selects an energy-delivery algorithm, modifies an energy-delivery algorithm, and/or adjusts energy-delivery parameters based thereon. More specifically, controller 274 may be configured to control power, voltage, current, impedance, crest factor, and/or phase of the output electrosurgical energy based on the feedback received from sensor circuitry 272 and according to an implemented energy-delivery algorithm. Sensor circuitry 272 and/or controller 274 may also monitor the wires connecting activation controls, e.g., activation controls 128 (FIG. 1A) and/or activation controls 178 (FIG.1B), and/or other inputs to electrosurgical generator 200 to determine activation, deactivation, settings, modes, and/or other operational inputs and to control electrosurgical generator 200 based thereon. [0040] In aspects, memory 276 can be separate from controller 274 and communicate with microprocessor 275 through communication buses of a circuit board, through communication cables such as serial ATA cables or other types of cables, and/or via suitable wireless communication protocols. Regardless of the location(s) of memory 276 and/or microprocessor 275, memory 276 includes computer-readable instructions that are executable by microprocessor 275 to operate controller 274, e.g., for executing various algorithms such as, for example, fixed algorithms, machine learning algorithms, etc. Controller 274 may further include a network Attorney Docket: A0008639WO01 interface (not shown) to communicate with other computers or a server. In aspects, a storage device (not shown) of controller 274 or separate therefrom may be used for storing data. [0041] Although illustrated as part of electrosurgical generator 200, it is also contemplated that controller 274 be remote from electrosurgical generator 200, e.g., on a remote server, and accessible by electrosurgical generator 200 via a wired or wireless connection. In configurations where controller 274 is remote, it is contemplated that controller 274 may be accessible by and connected to multiple electrosurgical generators 200. [0042] Turning to FIGS.4A and 4B, a similar monopolar electrosurgical system 100 is shown relating to FIG. 1A with the integration of an irrigation pump 400 coupled with a control pump algorithm PA operably couple to the electrosurgical generator 200. More particularly, irrigation pump 400 is operably coupled to a source of irrigation fluid, e.g., saline or some other known conductive surgical fluid, from a reservoir “S” to the monopolar electrosurgical device 120 via fluid line 310. Fluid line 310 is coupled to device 120 via a fluid coupler 123 and fluid “F” is delivered to the treatment site through an internal channel 127 defined through elongated shaft 121 of device 120. Control pump algorithm PA is configured to control the rate of flow of fluid “F” from the reservoir “S” to the treatment site, e.g., operating area, based on one or more operating parameters and electrical feedback relating thereto from the tissue treatment portion, e.g., tip, blade, knife, electrode, during activation to optimize a desired tissue effect, cut, ablate, seal, cauterize, etc. [0043] In embodiments, the control pump algorithm PA cooperates with the controller 274, microprocessor 275 and/or sensor circuitry 272 (and other components described above with reference to FIGS. 2 and 3) to control the rate of flow of the fluid “F” from the reservoir “S” to optimize the desired tissue effect. [0044] Turning to FIGS. 5A and 5B, a similar bipolar electrosurgical system 150 is shown relating to FIG.1B with the integration of the irrigation pump 400 coupled with the control pump algorithm PA operably couple to the electrosurgical generator 200. More particularly, irrigation pump 400 is operably coupled to the source of irrigation fluid, e.g., saline or some other known conductive surgical fluid, from reservoir “S” to the bipolar electrosurgical device 150 via fluid line 310. Fluid line 310 is coupled to electrosurgical device 150 via a fluid coupler 169 and fluid “F” Attorney Docket: A0008639WO01 is delivered to the treatment site through fluid line 167 attached to one of the jaw members, e.g., jaw member 162, of electrosurgical device 150. Similar to above, control pump algorithm PA is configured to control the rate of flow of fluid “F” from the reservoir “S” to the treatment site, e.g., operating area, based on one or more operating parameters and electrical feedback relating thereto from the tissue treatment portion, e.g., one or both electrodes 163, 165, during activation to optimize a desired tissue effect, e.g., seal, coagulate, open dissection, etc. [0045] In embodiments and similar to FIGS.4A and 4B, the control pump algorithm PA may be configured to cooperate with the controller 274, microprocessor 275 and/or sensor circuitry 272 (and/or other components described above with reference to FIGS.2 and 3) to control the rate of flow of the fluid “F” from the reservoir “S” to optimize the desired tissue effect when utilizing electrosurgical device 150. [0046] As can be appreciated, when utilizing electrosurgical devices 100 or 150 and navigating multiple tissue structures across various operating conditions the control pump algorithm PA cooperates with the controller 274, microprocessor 275 and/or sensor circuitry 272 as the various electrical feedback changes during activation and, in particular, as the tissue impedance changes so that the rate of fluid “F”, e.g., saline, can be increased or decreased to optimize the impedance range for the desired tissue effect. [0047] While several aspects of the disclosure have been shown in the drawings, it is not intended that the disclosure be limited thereto, as it is intended that the disclosure be as broad in scope as the art will allow and that the specification be read likewise. Therefore, the above description should not be construed as limiting, but merely as exemplifications of particular configurations. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto. [0048] It will be understood that various modifications may be made to the aspects and features disclosed herein. Therefore, the above description should not be construed as limiting, but merely as exemplifications of various aspects and features. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended hereto.