US Patent No: 8,034,049 - Analytics, PDF, Full Text and PAIR Access

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System and method for measuring initial tissue impedance

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Abstract

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An electrosurgical system and method are disclosed. The system includes an electrosurgical generator adapted to supply electrosurgical energy to tissue. The generator is further adapted to supply an electrical signal having at least one substantially constant value to tissue to determine initial tissue impedance response. The generator includes sensor circuitry adapted to continuously monitor initial tissue impedance response, wherein the initial tissue impedance response includes one of an initial impedance, an impedance drop, an impedance minimum and a first impedance rise. The generator also includes a microprocessor adapted to generate at least one tissue parameter based as a function of the initial impedance, the impedance drop, the impedance minimum and the first impedance rise. The system also includes an electrosurgical instrument including at least one active electrode adapted to apply electrosurgical energy to tissue for treatment.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
COVIDIEN AGNEUHAUSEN AM RHEINFALL640

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Denham, Amy Boulder, US 7 662
Odom, Darren Longmont, US 20 2001
Weinberg, Craig Denver, US 27 2262

Cited Art Landscape

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6,498,466 Cancellation of slope compensation effect on current limit 100 2000
 
CARDIAC PATHWAYS CORPORATION (1)
5,820,568 Apparatus and method for aiding in the positioning of a catheter 178 1996
 
Cardiac Pacemakers, Inc. (2)
5,971,980 System for controlling the energy delivered to a patient for ablation 278 1997
6,391,024 RF ablation apparatus and method having electrode/tissue contact assessment scheme and electrocardiogram filtering 249 1999
 
SMITH & NEPHEW, INC. (1)
2004/0030,330 Electrosurgery systems 409 2003
 
Cimarron Instruments, Inc. (1)
4,334,539 Electrosurgical generator control apparatus 136 1980
 
EP Technologies, Inc. (13)
5,383,874 Systems for identifying catheters and monitoring their use 469 1992
5,423,808 Systems and methods for radiofrequency ablation with phase sensitive power detection 357 1993
5,651,780 Systems for identifying catheters and monitoring their use 338 1994
5,688,267 Systems and methods for sensing multiple temperature conditions during tissue ablation 483 1995
5,769,847 Systems and methods for controlling tissue ablation using multiple temperature sensing elements 228 1996
5,755,715 Tissue heating and ablation systems and methods using time-variable set point temperature curves for monitoring and control 198 1996
5,702,386 Non-linear control systems and methods for heating and ablating body tissue 197 1996
5,897,552 Electrode and associated systems using thermally insulated temperature sensing elements 170 1997
6,053,912 Systems and methods for sensing sub-surface temperatures in body tissue during ablation with actively cooled electrodes 200 1997
6,113,591 Systems and methods for sensing sub-surface temperatures in body tissue 98 1997
6,056,745 Systems and methods for obtaining desired lesion characteristics while ablating body tissue 163 1997
6,014,581 Interface for performing a diagnostic or therapeutic procedure on heart tissue with an electrode structure 205 1998
6,786,905 Surgical method and apparatus for positioning a diagnostic or therapeutic element within the body 259 2002
 
COVIDIEN AG (39)
5,772,659 Electrosurgical generator power control circuit and method 226 1995
6,033,399 Electrosurgical generator with adaptive power control 492 1997
6,228,080 Electrosurgical generator with adaptive power control 356 1998
6,398,779 Vessel sealing system 415 1999
6,796,981 Vessel sealing system 310 2002
6,860,881 Multiple RF return pad contact detection system 112 2002
* 7,137,980 Method and system for controlling output of RF medical generator 261 2003
2006/0025,760 Blood detector for controlling anesu and method therefor 94 2003
RE40388 Electrosurgical generator with adaptive power control 90 2003
7,364,577 Vessel sealing system 117 2003
2008/0125,767 Thermocouple Measurement Circuit 75 2003
2004/0143,263 Compressible jaw configuration with bipolar RF output electrodes for soft tissue fusion 219 2003
7,131,860 Connector systems for electrosurgical generator 246 2003
7,044,948 Circuit for controlling arc energy from an electrosurgical generator 213 2003
7,147,638 Electrosurgical instrument which reduces thermal damage to adjacent tissue 252 2004
2005/0004,564 Method and system for programming and controlling an electrosurgical generator system 238 2004
2007/0093,800 Method and system for programming and controlling an electrosurgical generator system 59 2004
7,160,293 Multiple RF return pad contact detection system 90 2004
7,396,336 Switched resonant ultrasonic power amplifier system 176 2004
7,303,557 Vessel sealing system 247 2004
2005/0203,504 Method and system for controlling output of RF medical generator 233 2005
2005/0182,398 Method and system for continuity testing of medical electrodes 60 2005
2005/0197,659 Vessel sealing system using capacitive RF dielectric heating 189 2005
2006/0079,871 Universal foot switch contact port 54 2005
2007/0093,801 Circuit and method for reducing stored energy in an electrosurgical generator 66 2005
2007/0135,812 Laparoscopic apparatus for performing electrosurgical procedures 54 2005
2007/0173,810 Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling 51 2006
2006/0178,664 Circuit for controlling arc energy from an electrosurgical generator 55 2006
2007/0208,339 System and method for controlling electrosurgical snares 59 2006
2007/0225,698 System and method for generating radio frequency energy 47 2006
2007/0250,052 Arc based adaptive control system for an electrosurgical unit 47 2006
2007/0265,612 System and method for reducing leakage current in an electrosurgical generator 60 2006
2008/0039,831 System and method for measuring initial tissue impedance 80 2006
2008/0039,836 System and method for controlling RF output during tissue sealing 138 2006
2008/0082,094 Transformer for RF voltage sensing 49 2006
2007/0038,209 Method and system for controlling output of RF medical generator 61 2006
2007/0173,805 Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm 104 2007
2007/0173,806 System and method for closed loop monitoring of monopolar electrosurgical apparatus 171 2007
2008/0015,564 Method and system for programming and controlling an electrosurgical generator system 62 2007
 
LAZURE SCIENTIFIC, INC. (1)
5,908,444 Complex frequency pulsed electromagnetic generator and method of use 99 1997
 
Medtronic Vidamed, Inc. (1)
6,855,141 Method for monitoring impedance to control power and apparatus utilizing same 92 2002
 
CONWAY STUART MEDICAL, INC. (1)
6,358,245 Graphical user interface for association with an electrode structure deployed in contact with a tissue region 223 1999
 
ABIOMED, INC. (1)
7,062,331 Methods and apparatus for providing a sufficiently stable power to a load in an energy transfer system 78 2002
 
G2 DESIGN LIMITED (3)
5,099,840 Diathermy unit 394 1989
5,423,810 Cauterising apparatus 447 1993
5,451,224 Apparatus for radio frequency bipolar electrosurgery 461 1993
 
YAZAKI CORPORATION (1)
5,961,344 Cam-actuated terminal connector 80 1997
 
HAIR FREE CENTERS, INC. (1)
4,372,315 Impedance sensing epilator 90 1980
 
FREESCALE SEMICONDUCTOR, INC. (1)
4,931,717 Load response control and method 82 1989
 
LIVE TISSUE CONNECT, INC. (3)
6,562,037 Bonding of soft biological tissues by passing high frequency electric current therethrough 338 1998
6,733,498 System and method for control of tissue welding 312 2002
2004/0068,304 Bonding of soft biological tissues by passing high freouency electric current therethrough 91 2003
 
INTEGRA ME GMBH (4)
5,133,711 Electric surgical high-frequency instrument 85 1990
5,976,128 Electrosurgical high frequency generator 160 1997
5,951,545 High-frequency surgical instrument and method of operating the same 104 1997
6,074,388 Electrically operated medical apparatus 92 1998
 
DIPOLAR LIMITED (1)
6,010,499 Electrosurgical cutting and coagulation apparatus 119 1997
 
DRG (UK) LIMITED (1)
4,384,582 Patient plate for diathermy apparatus, and diathermy apparatus fitted with it 112 1980
 
Omron Tateisi Electronics Co. (1)
4,993,430 Electrode device for high frequency thermotherapy apparatus 133 1989
 
MEDTRONIC CRYOCATH LP (1)
5,281,213 Catheter for ice mapping and ablation 560 1992
 
ORATEC INTERVENTIONS, INC. (3)
6,162,217 Method and apparatus for controlling a temperature-controlled probe 135 1999
6,350,262 Method and apparatus for applying thermal energy to tissue asymetrically 131 2000
6,939,346 Method and apparatus for controlling a temperature-controlled probe 211 2002
 
MEDTRONIC, INC. (17)
5,342,409 Position-responsive neuro stimulator 411 1991
5,674,217 Heart synchronized extractor for an implanted object 116 1993
5,534,018 Automatic lead recognition for implantable medical device 267 1994
5,643,330 Multichannel apparatus for epidural spinal cord stimulation 354 1996
5,702,429 Neural stimulation techniques with feedback 283 1996
5,938,690 Pain management system and method 390 1996
5,925,070 Techniques for adjusting the locus of excitation of electrically excitable tissue 196 1997
6,063,078 Method and apparatus for tissue ablation 210 1997
5,948,007 Dual channel implantation neurostimulation techniques 134 1997
5,814,092 Neural stimulation techniques with feedback 210 1997
5,836,990 Method and apparatus for determining electrode/tissue contact 215 1997
5,913,882 Neural stimulation techniques with feedback 228 1998
6,648,883 Ablation system and method of use 216 2002
6,849,073 Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue 326 2002
6,989,010 Ablation system and method of use 135 2003
7,367,972 Ablation system 113 2003
* 7,247,155 Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue 176 2004
 
MICROLINE SURGICAL, INC. (4)
5,836,943 Electrosurgical generator 146 1996
6,238,387 Electrosurgical generator 184 1998
6,692,489 Electrosurgical mode conversion system 130 2000
7,175,621 Electrosurgical mode conversion system 85 2003
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
4,788,634 Resonant forward converter 129 1987
 
ENTEGRIS, INC. (1)
2004/0121,494 Infrared thermopile detector system for semiconductor process monitoring and control 1 2003
 
JPMORGAN CHASE BANK, N.A. (1)
* 5,445,638 Bipolar coagulation and cutting forceps 514 1993
 
MEDTRONIC CARDIORHYTHM (2)
5,540,681 Method and system for radiofrequency ablation of tissue 414 1994
5,584,830 Method and system for radiofrequency ablation of cardiac tissue 192 1994
 
GYRUS MEDICAL LIMITED CHARTERHOUSE (1)
5,438,302 Electrosurgical radiofrequency generator having regulated voltage across switching device 578 1994
 
ENGINEERING & RESEARCH ASSOCIATES, INC. (1)
5,868,737 Apparatus and method for determining ablation 141 1997
 
E.P. Technologies Inc. (1)
5,722,975 Systems for radiofrequency ablation with phase sensitive power detection and control 167 1995
 
Aspen Laboratories, Inc. (2)
4,569,345 High output electrosurgical unit 100 1984
4,848,335 Return electrode contact monitor 128 1988
 
GENERAL ELECTRIC COMPANY (1)
4,559,496 LCD Hook-on digital ammeter 79 1984
 
ETHICON ENDO-SURGERY, LLC (1)
7,060,063 Devices and methods for controlling initial movement of an electrosurgical electrode 83 2003
 
Storz Instrument Company (2)
5,249,121 Remote control console for surgical control system 198 1989
5,157,603 Control system for ophthalmic surgical instruments 113 1989
 
ST. JUDE MEDICAL, INC. (1)
5,300,068 Electrosurgical apparatus 450 1992
 
INTACT MEDICAL CORPORATION (3)
6,740,079 Electrosurgical generator 173 2001
7,004,174 Electrosurgery with infiltration anesthesia 89 2002
6,923,804 Electrosurgical generator 173 2003
 
KAMIYAMA, HIROYASU (1)
5,151,102 Blood vessel coagulation/stanching device 468 1990
 
Storz Endoskop GmbH (3)
6,261,285 High-frequency surgical device and operation monitoring device for a high-frequency surgical device 72 1998
6,275,786 Device for monitoring a neutral electrode during HF surgery 100 1999
6,864,686 High-frequency surgical device and operation monitoring device for a high-frequency surgical device 103 2002
 
The B. F. Goodrich Company (1)
4,514,619 Indirect current monitoring via voltage and impedance monitoring 106 1982
 
BROWN, RUSSELL A., TRUSTEE OF THE RUSSELL A. FAMILY LIVING TRUST (1)
4,608,977 System using computed tomography as for selective body treatment 357 1982
 
DELL PRODUCTS L.P. (1)
6,693,782 Surge suppression for current limiting circuits 62 2000
 
ARTHROCARE CORPORATION (3)
6,142,992 Power supply for limiting power in electrosurgery 299 1998
6,235,020 Power supply and methods for fluid delivery in electrosurgery 332 1998
6,296,636 Power supply and methods for limiting power in electrosurgery 316 1999
 
BAUSCH & LOMB INCORPORATED (1)
6,055,458 Modes/surgical functions 96 1997
 
REFRACTEC, INC. (1)
5,749,871 Method and apparatus for modifications of visual acuity by thermal means 129 1994
 
ERICSSON RAYNET (2)
5,694,304 High efficiency resonant switching converters 91 1995
5,712,772 Controller for high efficiency resonant switching converters 141 1995
 
RDM International, Inc. (1)
4,644,955 Circuit apparatus and method for electrothermal treatment of cancer eye 96 1985
 
MAQUET CARDIOVASCULAR LLC (1)
2004/0102,772 Apparatus and method for minimally invasive surgery using rotational cutting tool 13 2003
 
ESC MEDICAL SYSTEMS LTD. (1)
5,556,396 Method for tubal electroligation 272 1995
 
SENORX, INC. (2)
6,620,157 High frequency power source 176 2000
7,175,618 High frequency power source 59 2003
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
TYCO HEALTHCARE GROUP LP (1)
* 2012/0022,521 System And Method For Measuring Initial Tissue Impedance 7 2011
 
Coviden IP (1)
D680220 Slider handle for laparoscopic device 6 2012
 
COVIDIEN AG (11)
8,267,928 System and method for closed loop monitoring of monopolar electrosurgical apparatus 0 2011
8,241,278 Laparoscopic apparatus for performing electrosurgical procedures 1 2011
8,267,929 Method and system for programming and controlling an electrosurgical generator system 7 2011
8,647,340 Thermocouple measurement system 0 2012
8,485,993 Switched resonant ultrasonic power amplifier system 0 2012
9,168,089 Method and system for controlling output of RF medical generator 0 2012
9,113,900 Method and system for controlling output of RF medical generator 0 2012
8,475,447 System and method for closed loop monitoring of monopolar electrosurgical apparatus 0 2012
8,597,296 Bipolar forceps having monopolar extension 0 2012
8,591,506 Vessel sealing system 24 2012
8,966,981 Switched resonant ultrasonic power amplifier system 0 2013
 
COVIDIEN LP (10)
* 8,215,182 Apparatus and method for measuring pressure between jaw members 12 2008
9,033,973 System and method for DC tissue impedance sensing 0 2011
8,898,888 System for manufacturing electrosurgical seal plates 2 2012
9,113,940 Trigger lockout and kickback mechanism for surgical instruments 0 2012
8,568,444 Method of transferring rotational motion in an articulating surgical instrument 1 2012
9,028,493 In vivo attachable and detachable end effector assembly and laparoscopic surgical instrument and methods therefor 0 2012
8,454,602 Apparatus, system, and method for performing an electrosurgical procedure 6 2012
8,523,898 Endoscopic electrosurgical jaws with offset knife 6 2012
8,486,061 Imaginary impedance process monitoring and intelligent shut-off 0 2012
8,858,554 Apparatus, system, and method for performing an electrosurgical procedure 0 2013
* Cited By Examiner

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