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GB855459A - Improvements in or relating to electro-surgical apparatus - Google Patents

Improvements in or relating to electro-surgical apparatus

Info

Publication number
GB855459A
GB855459A GB1161158A GB1161158A GB855459A GB 855459 A GB855459 A GB 855459A GB 1161158 A GB1161158 A GB 1161158A GB 1161158 A GB1161158 A GB 1161158A GB 855459 A GB855459 A GB 855459A
Authority
GB
United Kingdom
Prior art keywords
relay
output
electro
potentiometer
impedance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1161158A
Inventor
Cleavemor Horne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KEELER OPTICAL PRODUCTS Ltd
Original Assignee
KEELER OPTICAL PRODUCTS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KEELER OPTICAL PRODUCTS Ltd filed Critical KEELER OPTICAL PRODUCTS Ltd
Priority to GB1161158A priority Critical patent/GB855459A/en
Publication of GB855459A publication Critical patent/GB855459A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/1206—Generators therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/0066—Sensing and controlling the application of energy without feedback, i.e. open loop control

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

855,459 Electro-surgical apparatus. KEELER OPTICAL PRODUCTS Ltd. July 13, 1959 [April 11, 1958], No. 11611/58. Class 81(2) Coagulating apparatus is provided with means which, when the impedance of the tissue reaches a predetermined value, causes the apparatus to be switched off. The device is connected across the generator output so that as coagulation proceeds and the impedance of the tissue increases the resultant rise in voltage across the electrodes can be used to operate a relay. The input is received through a variable resistancecapacitor network 1, 2, 3 and fed to a diode 4 the output of which, after smoothing, is applied across a potentiometer 8 and the output from the tapping on this is passed through a D.C. amplifier 9 to the relay 10. The setting of the potentiometer 8 thus determines the voltage at which the relay operates and, when this occurs, its contacts open and interrupt the power supply to the high frequency generator.
GB1161158A 1958-04-11 1958-04-11 Improvements in or relating to electro-surgical apparatus Expired GB855459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1161158A GB855459A (en) 1958-04-11 1958-04-11 Improvements in or relating to electro-surgical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1161158A GB855459A (en) 1958-04-11 1958-04-11 Improvements in or relating to electro-surgical apparatus

Publications (1)

Publication Number Publication Date
GB855459A true GB855459A (en) 1960-11-30

Family

ID=9989436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1161158A Expired GB855459A (en) 1958-04-11 1958-04-11 Improvements in or relating to electro-surgical apparatus

Country Status (1)

Country Link
GB (1) GB855459A (en)

Cited By (89)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178528B (en) * 1962-11-22 1964-09-24 Parisienne D Expl Des Etabliss Electrosurgical device for diathermic coagulation
US3946738A (en) * 1974-10-24 1976-03-30 Newton David W Leakage current cancelling circuit for use with electrosurgical instrument
US3961630A (en) * 1973-11-12 1976-06-08 Dentsply Research & Development Corporation Protective circuit for radio-frequency electrosurgical device
FR2306668A1 (en) * 1975-04-11 1976-11-05 Philips Nv DEVICE ALLOWING STERILIZATION BY TRANSUTERINE COAGULATION OF THE TISSUE BETWEEN THE OVIDUCTES AND THE UTERUS
US4114622A (en) * 1975-07-02 1978-09-19 Dentsply Research And Development Corporation Electrosurgical device
US4122854A (en) * 1973-08-23 1978-10-31 Matburn (Holdings) Limited Electrosurgical apparatus
US4188927A (en) * 1978-01-12 1980-02-19 Valleylab, Inc. Multiple source electrosurgical generator
US4216775A (en) * 1978-11-30 1980-08-12 Inverness International Corporation Electrolysis hair removal apparatus
US4271837A (en) * 1978-01-17 1981-06-09 Aesculap-Werke Aktiengesellschaft Vormals Jetter & Scheerer Electrosurgical apparatus
US4289135A (en) * 1978-11-23 1981-09-15 Tekniska Rontgencentralen Ab Apparatus for destroying a selected part of biological tissue
US4301801A (en) * 1979-02-16 1981-11-24 Ipco Hospital Supply Corporation (Whaledent International Division) Electrosurge failsafe system
US4343308A (en) * 1980-06-09 1982-08-10 Gross Robert D Surgical ground detector
DE3120102A1 (en) * 1981-05-20 1982-12-09 F.L. Fischer GmbH & Co, 7800 Freiburg ARRANGEMENT FOR HIGH-FREQUENCY COAGULATION OF EGG WHITE FOR SURGICAL PURPOSES
GB2213381A (en) * 1987-12-12 1989-08-16 Univ Wales Medicine Electro-surgical apparatus with body impedance monitoring
US4860745A (en) * 1986-07-17 1989-08-29 Erbe Elektromedizin Gmbh High frequency electrosurgical apparatus for thermal coagulation of biologic tissues
GB2259453A (en) * 1991-09-14 1993-03-17 Smiths Industries Plc Electrosurgery equipment
US7044948B2 (en) 2002-12-10 2006-05-16 Sherwood Services Ag Circuit for controlling arc energy from an electrosurgical generator
US7131860B2 (en) 2003-11-20 2006-11-07 Sherwood Services Ag Connector systems for electrosurgical generator
US7137980B2 (en) 1998-10-23 2006-11-21 Sherwood Services Ag Method and system for controlling output of RF medical generator
US7255694B2 (en) 2002-12-10 2007-08-14 Sherwood Services Ag Variable output crest factor electrosurgical generator
US7300435B2 (en) 2003-11-21 2007-11-27 Sherwood Services Ag Automatic control system for an electrosurgical generator
US7303557B2 (en) 1998-10-23 2007-12-04 Sherwood Services Ag Vessel sealing system
US7364577B2 (en) 2002-02-11 2008-04-29 Sherwood Services Ag Vessel sealing system
USRE40388E1 (en) 1997-04-09 2008-06-17 Covidien Ag Electrosurgical generator with adaptive power control
US7396336B2 (en) 2003-10-30 2008-07-08 Sherwood Services Ag Switched resonant ultrasonic power amplifier system
USD574323S1 (en) 2007-02-12 2008-08-05 Tyco Healthcare Group Lp Generator
US7513896B2 (en) 2006-01-24 2009-04-07 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US7628786B2 (en) 2004-10-13 2009-12-08 Covidien Ag Universal foot switch contact port
US7637907B2 (en) 2006-09-19 2009-12-29 Covidien Ag System and method for return electrode monitoring
US7648499B2 (en) 2006-03-21 2010-01-19 Covidien Ag System and method for generating radio frequency energy
US7651492B2 (en) 2006-04-24 2010-01-26 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US7651493B2 (en) 2006-03-03 2010-01-26 Covidien Ag System and method for controlling electrosurgical snares
US7722601B2 (en) 2003-05-01 2010-05-25 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US7731717B2 (en) 2006-08-08 2010-06-08 Covidien Ag System and method for controlling RF output during tissue sealing
US7749217B2 (en) 2002-05-06 2010-07-06 Covidien Ag Method and system for optically detecting blood and controlling a generator during electrosurgery
US7766905B2 (en) 2004-02-12 2010-08-03 Covidien Ag Method and system for continuity testing of medical electrodes
US7780662B2 (en) 2004-03-02 2010-08-24 Covidien Ag Vessel sealing system using capacitive RF dielectric heating
US7794457B2 (en) 2006-09-28 2010-09-14 Covidien Ag Transformer for RF voltage sensing
US7834484B2 (en) 2007-07-16 2010-11-16 Tyco Healthcare Group Lp Connection cable and method for activating a voltage-controlled generator
US7901400B2 (en) 1998-10-23 2011-03-08 Covidien Ag Method and system for controlling output of RF medical generator
US7927328B2 (en) 2006-01-24 2011-04-19 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US7947039B2 (en) 2005-12-12 2011-05-24 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US7956620B2 (en) 2009-08-12 2011-06-07 Tyco Healthcare Group Lp System and method for augmented impedance sensing
US7972328B2 (en) 2006-01-24 2011-07-05 Covidien Ag System and method for tissue sealing
US8034049B2 (en) 2006-08-08 2011-10-11 Covidien Ag System and method for measuring initial tissue impedance
US8104956B2 (en) 2003-10-23 2012-01-31 Covidien Ag Thermocouple measurement circuit
US8147485B2 (en) 2006-01-24 2012-04-03 Covidien Ag System and method for tissue sealing
US8152802B2 (en) 2009-01-12 2012-04-10 Tyco Healthcare Group Lp Energy delivery algorithm filter pre-loading
US8162932B2 (en) 2009-01-12 2012-04-24 Tyco Healthcare Group Lp Energy delivery algorithm impedance trend adaptation
US8167875B2 (en) 2009-01-12 2012-05-01 Tyco Healthcare Group Lp Energy delivery algorithm for medical devices
US8174267B2 (en) 2008-09-30 2012-05-08 Vivant Medical, Inc. Intermittent microwave energy delivery system
US8180433B2 (en) 2008-09-30 2012-05-15 Vivant Medical, Inc. Microwave system calibration apparatus, system and method of use
US8211100B2 (en) 2009-01-12 2012-07-03 Tyco Healthcare Group Lp Energy delivery algorithm for medical devices based on maintaining a fixed position on a tissue electrical conductivity v. temperature curve
US8216220B2 (en) 2007-09-07 2012-07-10 Tyco Healthcare Group Lp System and method for transmission of combined data stream
US8216223B2 (en) 2006-01-24 2012-07-10 Covidien Ag System and method for tissue sealing
US8226639B2 (en) 2008-06-10 2012-07-24 Tyco Healthcare Group Lp System and method for output control of electrosurgical generator
US8231553B2 (en) 2009-01-13 2012-07-31 Tyco Healthcare Group Lp Method for wireless control of electrosurgery
US8235917B2 (en) 2009-01-13 2012-08-07 Tyco Healthcare Group Lp Wireless electrosurgical controller
US8242782B2 (en) 2008-09-30 2012-08-14 Vivant Medical, Inc. Microwave ablation generator control system
US8248075B2 (en) 2008-09-30 2012-08-21 Vivant Medical, Inc. System, apparatus and method for dissipating standing wave in a microwave delivery system
US8257349B2 (en) 2008-03-28 2012-09-04 Tyco Healthcare Group Lp Electrosurgical apparatus with predictive RF source control
US8262652B2 (en) 2009-01-12 2012-09-11 Tyco Healthcare Group Lp Imaginary impedance process monitoring and intelligent shut-off
US8287529B2 (en) 2008-09-05 2012-10-16 Tyco Healthcare Group Lp Electrosurgical apparatus with high speed energy recovery
US8287527B2 (en) 2008-09-30 2012-10-16 Vivant Medical, Inc. Microwave system calibration apparatus and method of use
US8298231B2 (en) 2008-01-31 2012-10-30 Tyco Healthcare Group Lp Bipolar scissors for adenoid and tonsil removal
US8333759B2 (en) 2009-01-12 2012-12-18 Covidien Lp Energy delivery algorithm for medical devices
US8346370B2 (en) 2008-09-30 2013-01-01 Vivant Medical, Inc. Delivered energy generator for microwave ablation
US8377053B2 (en) 2008-09-05 2013-02-19 Covidien Lp Electrosurgical apparatus with high speed energy recovery
US8403924B2 (en) 2008-09-03 2013-03-26 Vivant Medical, Inc. Shielding for an isolation apparatus used in a microwave generator
US8409186B2 (en) 2008-03-13 2013-04-02 Covidien Lp Crest factor enhancement in electrosurgical generators
US8491579B2 (en) 2010-02-05 2013-07-23 Covidien Lp Electrosurgical devices with choke shorted to biological tissue
US8512332B2 (en) 2007-09-21 2013-08-20 Covidien Lp Real-time arc control in electrosurgical generators
US8663214B2 (en) 2006-01-24 2014-03-04 Covidien Ag Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US8685016B2 (en) 2006-01-24 2014-04-01 Covidien Ag System and method for tissue sealing
US8734438B2 (en) 2005-10-21 2014-05-27 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US8734444B2 (en) 2008-10-10 2014-05-27 Covidien Lp System and method for delivering high current to electrosurgical device
US8753334B2 (en) 2006-05-10 2014-06-17 Covidien Ag System and method for reducing leakage current in an electrosurgical generator
US8777941B2 (en) 2007-05-10 2014-07-15 Covidien Lp Adjustable impedance electrosurgical electrodes
US8808161B2 (en) 2003-10-23 2014-08-19 Covidien Ag Redundant temperature monitoring in electrosurgical systems for safety mitigation
US8852179B2 (en) 2008-10-10 2014-10-07 Covidien Lp Apparatus, system and method for monitoring tissue during an electrosurgical procedure
US8932282B2 (en) 2009-08-03 2015-01-13 Covidien Lp Power level transitioning in a surgical instrument
US9186200B2 (en) 2006-01-24 2015-11-17 Covidien Ag System and method for tissue sealing
US9474564B2 (en) 2005-03-31 2016-10-25 Covidien Ag Method and system for compensating for external impedance of an energy carrying component when controlling an electrosurgical generator
US9522039B2 (en) 2009-03-11 2016-12-20 Covidien Lp Crest factor enhancement in electrosurgical generators
US9529025B2 (en) 2012-06-29 2016-12-27 Covidien Lp Systems and methods for measuring the frequency of signals generated by high frequency medical devices
US9636165B2 (en) 2013-07-29 2017-05-02 Covidien Lp Systems and methods for measuring tissue impedance through an electrosurgical cable
US9700366B2 (en) 2008-08-01 2017-07-11 Covidien Lp Polyphase electrosurgical system and method
US9872719B2 (en) 2013-07-24 2018-01-23 Covidien Lp Systems and methods for generating electrosurgical energy using a multistage power converter
US12226143B2 (en) 2020-06-22 2025-02-18 Covidien Lp Universal surgical footswitch toggling

Cited By (146)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178528B (en) * 1962-11-22 1964-09-24 Parisienne D Expl Des Etabliss Electrosurgical device for diathermic coagulation
US4122854A (en) * 1973-08-23 1978-10-31 Matburn (Holdings) Limited Electrosurgical apparatus
US3961630A (en) * 1973-11-12 1976-06-08 Dentsply Research & Development Corporation Protective circuit for radio-frequency electrosurgical device
US3946738A (en) * 1974-10-24 1976-03-30 Newton David W Leakage current cancelling circuit for use with electrosurgical instrument
FR2306668A1 (en) * 1975-04-11 1976-11-05 Philips Nv DEVICE ALLOWING STERILIZATION BY TRANSUTERINE COAGULATION OF THE TISSUE BETWEEN THE OVIDUCTES AND THE UTERUS
US4057063A (en) * 1975-04-11 1977-11-08 U.S. Philips Corporation Device for sterilization by transuterine tube coagulation
US4114622A (en) * 1975-07-02 1978-09-19 Dentsply Research And Development Corporation Electrosurgical device
US4188927A (en) * 1978-01-12 1980-02-19 Valleylab, Inc. Multiple source electrosurgical generator
US4271837A (en) * 1978-01-17 1981-06-09 Aesculap-Werke Aktiengesellschaft Vormals Jetter & Scheerer Electrosurgical apparatus
US4289135A (en) * 1978-11-23 1981-09-15 Tekniska Rontgencentralen Ab Apparatus for destroying a selected part of biological tissue
US4216775A (en) * 1978-11-30 1980-08-12 Inverness International Corporation Electrolysis hair removal apparatus
US4301801A (en) * 1979-02-16 1981-11-24 Ipco Hospital Supply Corporation (Whaledent International Division) Electrosurge failsafe system
US4343308A (en) * 1980-06-09 1982-08-10 Gross Robert D Surgical ground detector
US4474179A (en) * 1981-05-20 1984-10-02 F. L. Fischer Gmbh & Co. Method and apparatus for the high frequency coagulation of protein for surgical purposes
DE3120102A1 (en) * 1981-05-20 1982-12-09 F.L. Fischer GmbH & Co, 7800 Freiburg ARRANGEMENT FOR HIGH-FREQUENCY COAGULATION OF EGG WHITE FOR SURGICAL PURPOSES
US4860745A (en) * 1986-07-17 1989-08-29 Erbe Elektromedizin Gmbh High frequency electrosurgical apparatus for thermal coagulation of biologic tissues
GB2213381A (en) * 1987-12-12 1989-08-16 Univ Wales Medicine Electro-surgical apparatus with body impedance monitoring
GB2213381B (en) * 1987-12-12 1992-06-03 Univ Wales Medicine Surgical diathermy instruments
GB2259453A (en) * 1991-09-14 1993-03-17 Smiths Industries Plc Electrosurgery equipment
US5246439A (en) * 1991-09-14 1993-09-21 Smiths Industries Public Limited Company Electrosurgery equipment
GB2259453B (en) * 1991-09-14 1995-07-12 Smiths Industries Plc Electrosurgery equipment
USRE40388E1 (en) 1997-04-09 2008-06-17 Covidien Ag Electrosurgical generator with adaptive power control
US8287528B2 (en) 1998-10-23 2012-10-16 Covidien Ag Vessel sealing system
US7137980B2 (en) 1998-10-23 2006-11-21 Sherwood Services Ag Method and system for controlling output of RF medical generator
US9113900B2 (en) 1998-10-23 2015-08-25 Covidien Ag Method and system for controlling output of RF medical generator
US9168089B2 (en) 1998-10-23 2015-10-27 Covidien Ag Method and system for controlling output of RF medical generator
US7303557B2 (en) 1998-10-23 2007-12-04 Sherwood Services Ag Vessel sealing system
US8105323B2 (en) 1998-10-23 2012-01-31 Covidien Ag Method and system for controlling output of RF medical generator
US7901400B2 (en) 1998-10-23 2011-03-08 Covidien Ag Method and system for controlling output of RF medical generator
US7364577B2 (en) 2002-02-11 2008-04-29 Sherwood Services Ag Vessel sealing system
US7749217B2 (en) 2002-05-06 2010-07-06 Covidien Ag Method and system for optically detecting blood and controlling a generator during electrosurgery
US7044948B2 (en) 2002-12-10 2006-05-16 Sherwood Services Ag Circuit for controlling arc energy from an electrosurgical generator
US8523855B2 (en) 2002-12-10 2013-09-03 Covidien Ag Circuit for controlling arc energy from an electrosurgical generator
US7255694B2 (en) 2002-12-10 2007-08-14 Sherwood Services Ag Variable output crest factor electrosurgical generator
US7824400B2 (en) 2002-12-10 2010-11-02 Covidien Ag Circuit for controlling arc energy from an electrosurgical generator
US8080008B2 (en) 2003-05-01 2011-12-20 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8298223B2 (en) 2003-05-01 2012-10-30 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8267929B2 (en) 2003-05-01 2012-09-18 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8303580B2 (en) 2003-05-01 2012-11-06 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8012150B2 (en) 2003-05-01 2011-09-06 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US7722601B2 (en) 2003-05-01 2010-05-25 Covidien Ag Method and system for programming and controlling an electrosurgical generator system
US8647340B2 (en) 2003-10-23 2014-02-11 Covidien Ag Thermocouple measurement system
US8104956B2 (en) 2003-10-23 2012-01-31 Covidien Ag Thermocouple measurement circuit
US8808161B2 (en) 2003-10-23 2014-08-19 Covidien Ag Redundant temperature monitoring in electrosurgical systems for safety mitigation
US7396336B2 (en) 2003-10-30 2008-07-08 Sherwood Services Ag Switched resonant ultrasonic power amplifier system
US8485993B2 (en) 2003-10-30 2013-07-16 Covidien Ag Switched resonant ultrasonic power amplifier system
US9768373B2 (en) 2003-10-30 2017-09-19 Covidien Ag Switched resonant ultrasonic power amplifier system
US8096961B2 (en) 2003-10-30 2012-01-17 Covidien Ag Switched resonant ultrasonic power amplifier system
US8113057B2 (en) 2003-10-30 2012-02-14 Covidien Ag Switched resonant ultrasonic power amplifier system
US8966981B2 (en) 2003-10-30 2015-03-03 Covidien Ag Switched resonant ultrasonic power amplifier system
US7416437B2 (en) 2003-11-20 2008-08-26 Sherwood Services Ag Connector systems for electrosurgical generator
US7131860B2 (en) 2003-11-20 2006-11-07 Sherwood Services Ag Connector systems for electrosurgical generator
US7766693B2 (en) 2003-11-20 2010-08-03 Covidien Ag Connector systems for electrosurgical generator
US7300435B2 (en) 2003-11-21 2007-11-27 Sherwood Services Ag Automatic control system for an electrosurgical generator
US7766905B2 (en) 2004-02-12 2010-08-03 Covidien Ag Method and system for continuity testing of medical electrodes
US7780662B2 (en) 2004-03-02 2010-08-24 Covidien Ag Vessel sealing system using capacitive RF dielectric heating
US8025660B2 (en) 2004-10-13 2011-09-27 Covidien Ag Universal foot switch contact port
US7628786B2 (en) 2004-10-13 2009-12-08 Covidien Ag Universal foot switch contact port
US9474564B2 (en) 2005-03-31 2016-10-25 Covidien Ag Method and system for compensating for external impedance of an energy carrying component when controlling an electrosurgical generator
US11013548B2 (en) 2005-03-31 2021-05-25 Covidien Ag Method and system for compensating for external impedance of energy carrying component when controlling electrosurgical generator
US9522032B2 (en) 2005-10-21 2016-12-20 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US8734438B2 (en) 2005-10-21 2014-05-27 Covidien Ag Circuit and method for reducing stored energy in an electrosurgical generator
US7947039B2 (en) 2005-12-12 2011-05-24 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US8241278B2 (en) 2005-12-12 2012-08-14 Covidien Ag Laparoscopic apparatus for performing electrosurgical procedures
US8216223B2 (en) 2006-01-24 2012-07-10 Covidien Ag System and method for tissue sealing
US8663214B2 (en) 2006-01-24 2014-03-04 Covidien Ag Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US7972328B2 (en) 2006-01-24 2011-07-05 Covidien Ag System and method for tissue sealing
US8187262B2 (en) 2006-01-24 2012-05-29 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US8202271B2 (en) 2006-01-24 2012-06-19 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US7927328B2 (en) 2006-01-24 2011-04-19 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US10582964B2 (en) 2006-01-24 2020-03-10 Covidien Lp Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US8147485B2 (en) 2006-01-24 2012-04-03 Covidien Ag System and method for tissue sealing
US8685016B2 (en) 2006-01-24 2014-04-01 Covidien Ag System and method for tissue sealing
US8267928B2 (en) 2006-01-24 2012-09-18 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US7513896B2 (en) 2006-01-24 2009-04-07 Covidien Ag Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling
US8475447B2 (en) 2006-01-24 2013-07-02 Covidien Ag System and method for closed loop monitoring of monopolar electrosurgical apparatus
US9642665B2 (en) 2006-01-24 2017-05-09 Covidien Ag Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm
US9186200B2 (en) 2006-01-24 2015-11-17 Covidien Ag System and method for tissue sealing
US7651493B2 (en) 2006-03-03 2010-01-26 Covidien Ag System and method for controlling electrosurgical snares
US7972332B2 (en) 2006-03-03 2011-07-05 Covidien Ag System and method for controlling electrosurgical snares
US7648499B2 (en) 2006-03-21 2010-01-19 Covidien Ag System and method for generating radio frequency energy
US8556890B2 (en) 2006-04-24 2013-10-15 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US7651492B2 (en) 2006-04-24 2010-01-26 Covidien Ag Arc based adaptive control system for an electrosurgical unit
US9119624B2 (en) 2006-04-24 2015-09-01 Covidien Ag ARC based adaptive control system for an electrosurgical unit
US8753334B2 (en) 2006-05-10 2014-06-17 Covidien Ag System and method for reducing leakage current in an electrosurgical generator
US8034049B2 (en) 2006-08-08 2011-10-11 Covidien Ag System and method for measuring initial tissue impedance
US7731717B2 (en) 2006-08-08 2010-06-08 Covidien Ag System and method for controlling RF output during tissue sealing
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