US Patent No: 8,034,049

Number of patents in Portfolio can not be more than 2000

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 RHEINFALL670

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Denham, Amy Boulder, US 7 747
Odom, Darren Longmont, US 21 2472
Weinberg, Craig Denver, US 27 2679

Cited Art Landscape

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5,423,808 Systems and methods for radiofrequency ablation with phase sensitive power detection 389 1993
5,651,780 Systems for identifying catheters and monitoring their use 401 1994
5,688,267 Systems and methods for sensing multiple temperature conditions during tissue ablation 525 1995
5,769,847 Systems and methods for controlling tissue ablation using multiple temperature sensing elements 268 1996
5,755,715 Tissue heating and ablation systems and methods using time-variable set point temperature curves for monitoring and control 233 1996
5,702,386 Non-linear control systems and methods for heating and ablating body tissue 238 1996
5,897,552 Electrode and associated systems using thermally insulated temperature sensing elements 259 1997
6,053,912 Systems and methods for sensing sub-surface temperatures in body tissue during ablation with actively cooled electrodes 222 1997
6,113,591 Systems and methods for sensing sub-surface temperatures in body tissue 108 1997
6,056,745 Systems and methods for obtaining desired lesion characteristics while ablating body tissue 184 1997
6,014,581 Interface for performing a diagnostic or therapeutic procedure on heart tissue with an electrode structure 243 1998
6,786,905 Surgical method and apparatus for positioning a diagnostic or therapeutic element within the body 288 2002
 
COVIDIEN AG (44)
5,772,659 Electrosurgical generator power control circuit and method 314 1995
6,033,399 Electrosurgical generator with adaptive power control 610 1997
6,228,080 Electrosurgical generator with adaptive power control 402 1998
6,398,779 Vessel sealing system 467 1999
6,740,079 Electrosurgical generator 197 2001
6,796,981 Vessel sealing system 379 2002
7,004,174 Electrosurgery with infiltration anesthesia 102 2002
6,860,881 Multiple RF return pad contact detection system 117 2002
* 7,137,980 Method and system for controlling output of RF medical generator 336 2003
2006/0025,760 Blood detector for controlling anesu and method therefor 100 2003
RE40388 Electrosurgical generator with adaptive power control 124 2003
7,364,577 Vessel sealing system 164 2003
6,923,804 Electrosurgical generator 199 2003
2008/0125,767 Thermocouple Measurement Circuit 80 2003
2004/0143,263 Compressible jaw configuration with bipolar RF output electrodes for soft tissue fusion 229 2003
7,131,860 Connector systems for electrosurgical generator 276 2003
7,044,948 Circuit for controlling arc energy from an electrosurgical generator 225 2003
7,147,638 Electrosurgical instrument which reduces thermal damage to adjacent tissue 269 2004
2005/0004,564 Method and system for programming and controlling an electrosurgical generator system 253 2004
2007/0093,800 Method and system for programming and controlling an electrosurgical generator system 67 2004
7,160,293 Multiple RF return pad contact detection system 97 2004
7,396,336 Switched resonant ultrasonic power amplifier system 207 2004
7,303,557 Vessel sealing system 298 2004
2005/0203,504 Method and system for controlling output of RF medical generator 249 2005
2005/0182,398 Method and system for continuity testing of medical electrodes 64 2005
2005/0197,659 Vessel sealing system using capacitive RF dielectric heating 195 2005
2006/0079,871 Universal foot switch contact port 57 2005
2007/0093,801 Circuit and method for reducing stored energy in an electrosurgical generator 72 2005
2007/0135,812 Laparoscopic apparatus for performing electrosurgical procedures 58 2005
2006/0161,148 Circuit and method for controlling an electrosurgical generator using a full bridge topology 106 2006
2007/0173,810 Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling 54 2006
2006/0178,664 Circuit for controlling arc energy from an electrosurgical generator 58 2006
2007/0208,339 System and method for controlling electrosurgical snares 70 2006
2007/0225,698 System and method for generating radio frequency energy 51 2006
2006/0224,152 Method and system for compensating for external impedance of an energy carrying component when controlling an electrosurgical generator 94 2006
2007/0250,052 Arc based adaptive control system for an electrosurgical unit 50 2006
2007/0265,612 System and method for reducing leakage current in an electrosurgical generator 63 2006
2008/0039,831 System and method for measuring initial tissue impedance 87 2006
2008/0039,836 System and method for controlling RF output during tissue sealing 148 2006
2008/0082,094 Transformer for RF voltage sensing 53 2006
2007/0038,209 Method and system for controlling output of RF medical generator 66 2006
2007/0173,805 Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm 134 2007
2007/0173,806 System and method for closed loop monitoring of monopolar electrosurgical apparatus 240 2007
2008/0015,564 Method and system for programming and controlling an electrosurgical generator system 70 2007
 
LAZURE SCIENTIFIC, INC. (1)
5,908,444 Complex frequency pulsed electromagnetic generator and method of use 107 1997
 
VENTURE LENDING & LEASING, INC. (1)
5,370,675 Medical probe device and method 934 1993
 
CONWAY STUART MEDICAL, INC. (1)
6,358,245 Graphical user interface for association with an electrode structure deployed in contact with a tissue region 249 1999
 
ABIOMED, INC. (1)
7,062,331 Methods and apparatus for providing a sufficiently stable power to a load in an energy transfer system 84 2002
 
G2 Design Limited (3)
5,099,840 Diathermy unit 421 1989
5,423,810 Cauterising apparatus 465 1993
5,451,224 Apparatus for radio frequency bipolar electrosurgery 475 1993
 
YAZAKI CORPORATION (1)
5,961,344 Cam-actuated terminal connector 83 1997
 
HAIR FREE CENTERS, INC. (1)
4,372,315 Impedance sensing epilator 95 1980
 
FREESCALE SEMICONDUCTOR, INC. (1)
4,931,717 Load response control and method 85 1989
 
LIVE TISSUE CONNECT, INC. (3)
6,562,037 Bonding of soft biological tissues by passing high frequency electric current therethrough 361 1998
6,733,498 System and method for control of tissue welding 329 2002
2004/0068,304 Bonding of soft biological tissues by passing high freouency electric current therethrough 98 2003
 
AUSLO RESEARCH LLC (1)
5,330,518 Method for treating interstitial tissue associated with microwave thermal therapy 309 1992
 
INTEGRA ME GMBH (4)
5,133,711 Electric surgical high-frequency instrument 90 1990
5,976,128 Electrosurgical high frequency generator 177 1997
5,951,545 High-frequency surgical instrument and method of operating the same 116 1997
6,074,388 Electrically operated medical apparatus 98 1998
 
DIPOLAR LIMITED (1)
6,010,499 Electrosurgical cutting and coagulation apparatus 123 1997
 
DRG (UK) LIMITED (1)
4,384,582 Patient plate for diathermy apparatus, and diathermy apparatus fitted with it 116 1980
 
Omron Tateisi Electronics Co. (1)
4,993,430 Electrode device for high frequency thermotherapy apparatus 137 1989
 
MEDTRONIC CRYOCATH LP (1)
5,281,213 Catheter for ice mapping and ablation 590 1992
 
ORATEC INTERVENTIONS, INC. (3)
6,162,217 Method and apparatus for controlling a temperature-controlled probe 144 1999
6,350,262 Method and apparatus for applying thermal energy to tissue asymetrically 149 2000
6,939,346 Method and apparatus for controlling a temperature-controlled probe 259 2002
 
MEDTRONIC, INC. (17)
5,342,409 Position-responsive neuro stimulator 447 1991
5,674,217 Heart synchronized extractor for an implanted object 126 1993
5,534,018 Automatic lead recognition for implantable medical device 285 1994
5,643,330 Multichannel apparatus for epidural spinal cord stimulation 404 1996
5,702,429 Neural stimulation techniques with feedback 312 1996
5,938,690 Pain management system and method 455 1996
5,925,070 Techniques for adjusting the locus of excitation of electrically excitable tissue 207 1997
6,063,078 Method and apparatus for tissue ablation 237 1997
5,948,007 Dual channel implantation neurostimulation techniques 151 1997
5,814,092 Neural stimulation techniques with feedback 227 1997
5,836,990 Method and apparatus for determining electrode/tissue contact 267 1997
5,913,882 Neural stimulation techniques with feedback 252 1998
6,648,883 Ablation system and method of use 241 2002
6,849,073 Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue 387 2002
6,989,010 Ablation system and method of use 175 2003
7,367,972 Ablation system 134 2003
* 7,247,155 Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue 203 2004
 
MICROLINE SURGICAL, INC. (4)
5,836,943 Electrosurgical generator 181 1996
6,238,387 Electrosurgical generator 224 1998
6,692,489 Electrosurgical mode conversion system 142 2000
7,175,621 Electrosurgical mode conversion system 95 2003
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
4,788,634 Resonant forward converter 134 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 559 1993
 
MEDTRONIC CARDIORHYTHM (2)
5,540,681 Method and system for radiofrequency ablation of tissue 472 1994
5,584,830 Method and system for radiofrequency ablation of cardiac tissue 220 1994
 
GYRUS MEDICAL LIMITED CHARTERHOUSE (1)
5,438,302 Electrosurgical radiofrequency generator having regulated voltage across switching device 664 1994
 
ENGINEERING & RESEARCH ASSOCIATES, INC. (1)
5,868,737 Apparatus and method for determining ablation 150 1997
 
E.P. Technologies Inc. (1)
5,722,975 Systems for radiofrequency ablation with phase sensitive power detection and control 174 1995
 
Aspen Laboratories, Inc. (2)
4,569,345 High output electrosurgical unit 108 1984
4,848,335 Return electrode contact monitor 133 1988
 
GENERAL ELECTRIC COMPANY (1)
4,559,496 LCD Hook-on digital ammeter 82 1984
 
ETHICON ENDO-SURGERY, LLC (1)
7,060,063 Devices and methods for controlling initial movement of an electrosurgical electrode 92 2003
 
STORZ INSTRUMENT COMPANY (2)
5,249,121 Remote control console for surgical control system 211 1989
5,157,603 Control system for ophthalmic surgical instruments 116 1989
 
ST. JUDE MEDICAL, INC. (1)
5,300,068 Electrosurgical apparatus 546 1992
 
KAMIYAMA, HIROYASU (1)
5,151,102 Blood vessel coagulation/stanching device 486 1990
 
STORZ ENDOSKOP GMBH (3)
6,261,285 High-frequency surgical device and operation monitoring device for a high-frequency surgical device 75 1998
6,275,786 Device for monitoring a neutral electrode during HF surgery 104 1999
6,864,686 High-frequency surgical device and operation monitoring device for a high-frequency surgical device 107 2002
 
The B. F. Goodrich Company (1)
4,514,619 Indirect current monitoring via voltage and impedance monitoring 111 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 372 1982
 
DELL PRODUCTS L.P. (1)
6,693,782 Surge suppression for current limiting circuits 67 2000
 
ARTHROCARE CORPORATION (3)
6,142,992 Power supply for limiting power in electrosurgery 328 1998
6,235,020 Power supply and methods for fluid delivery in electrosurgery 360 1998
6,296,636 Power supply and methods for limiting power in electrosurgery 343 1999
 
BAUSCH & LOMB INCORPORATED (1)
6,055,458 Modes/surgical functions 99 1997
 
REFRACTEC INC. (1)
5,749,871 Method and apparatus for modifications of visual acuity by thermal means 134 1994
 
ERICSSON RAYNET (2)
5,694,304 High efficiency resonant switching converters 97 1995
5,712,772 Controller for high efficiency resonant switching converters 154 1995
 
RDM International, Inc. (1)
4,644,955 Circuit apparatus and method for electrothermal treatment of cancer eye 107 1985
 
MAQUET CARDIOVASCULAR LLC (1)
2004/0102,772 Apparatus and method for minimally invasive surgery using rotational cutting tool 24 2003
 
ESC MEDICAL SYSTEMS LTD. (1)
5,556,396 Method for tubal electroligation 276 1995
 
SENORX, INC. (2)
6,620,157 High frequency power source 192 2000
7,175,618 High frequency power source 64 2003
 
CYNOSURE, INC. (5)
5,954,686 Dual-frequency electrosurgical instrument 136 1998
6,238,388 Low-voltage electrosurgical apparatus 113 1999
6,652,514 Intelligent selection system for electrosurgical instrument 295 2001
6,712,813 RF probe for electrosurgical instrument 129 2001
6,994,707 Intelligent selection system for electrosurgical instrument 235 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 11 2012
 
COVIDIEN AG (14)
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 3 2011
8,267,929 Method and system for programming and controlling an electrosurgical generator system 13 2011
8,647,340 Thermocouple measurement system 0 2012
8,485,993 Switched resonant ultrasonic power amplifier system 1 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 1 2012
8,591,506 Vessel sealing system 60 2012
8,966,981 Switched resonant ultrasonic power amplifier system 0 2013
9,463,067 Vessel sealing system 0 2013
9,375,270 Vessel sealing system 0 2013
9,375,271 Vessel sealing system 0 2013
 
COVIDIEN LP (13)
* 8,215,182 Apparatus and method for measuring pressure between jaw members 18 2008
* 2011/0036,183 APPARATUS AND METHOD FOR MEASURING PRESSURE BETWEEN JAW MEMBERS 21 2008
9,033,973 System and method for DC tissue impedance sensing 0 2011
8,898,888 System for manufacturing electrosurgical seal plates 6 2012
9,113,940 Trigger lockout and kickback mechanism for surgical instruments 5 2012
8,568,444 Method of transferring rotational motion in an articulating surgical instrument 3 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 13 2012
8,523,898 Endoscopic electrosurgical jaws with offset knife 13 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 2 2013
9,345,535 Apparatus, system and method for performing an electrosurgical procedure 0 2014
9,265,552 Method of manufacturing electrosurgical seal plates 0 2014
* Cited By Examiner

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