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

Number of patents in Portfolio can not be more than 2000

System and method for measuring initial tissue impedance

ALSO PUBLISHED AS: 20080039831

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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 RHEINFALL628

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Denham, Amy Boulder, US 7 251
Odom, Darren Longmont, US 20 1049
Weinberg, Craig Denver, US 27 688

Cited Art Landscape

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5,196,009 Non-sticking electrosurgical device having nickel tips 238 1991
 
INFINEON TECHNOLOGIES AG (1)
6,222,356 Current mode switching regulator configured such that a measuring resistor is not needed to measure the current at an inductor 84 1999
 
LINEAR TECHNOLOGY CORPORATION (1)
6,498,466 Cancellation of slope compensation effect on current limit 96 2000
 
CARDIAC PATHWAYS CORPORATION (1)
5,820,568 Apparatus and method for aiding in the positioning of a catheter 164 1996
 
Cardiac Pacemakers, Inc. (2)
5,971,980 System for controlling the energy delivered to a patient for ablation 264 1997
6,391,024 RF ablation apparatus and method having electrode/tissue contact assessment scheme and electrocardiogram filtering 218 1999
 
SMITH & NEPHEW, INC. (1)
2004/0030,330 Electrosurgery systems 371 2003
 
Cimarron Instruments, Inc. (1)
4,334,539 Electrosurgical generator control apparatus 127 1980
 
EP Technologies, Inc. (13)
5,383,874 Systems for identifying catheters and monitoring their use 418 1992
5,423,808 Systems and methods for radiofrequency ablation with phase sensitive power detection 339 1993
5,651,780 Systems for identifying catheters and monitoring their use 297 1994
5,688,267 Systems and methods for sensing multiple temperature conditions during tissue ablation 459 1995
5,769,847 Systems and methods for controlling tissue ablation using multiple temperature sensing elements 202 1996
5,755,715 Tissue heating and ablation systems and methods using time-variable set point temperature curves for monitoring and control 180 1996
5,702,386 Non-linear control systems and methods for heating and ablating body tissue 171 1996
5,897,552 Electrode and associated systems using thermally insulated temperature sensing elements 131 1997
6,053,912 Systems and methods for sensing sub-surface temperatures in body tissue during ablation with actively cooled electrodes 192 1997
6,113,591 Systems and methods for sensing sub-surface temperatures in body tissue 93 1997
6,056,745 Systems and methods for obtaining desired lesion characteristics while ablating body tissue 151 1997
6,014,581 Interface for performing a diagnostic or therapeutic procedure on heart tissue with an electrode structure 185 1998
6,786,905 Surgical method and apparatus for positioning a diagnostic or therapeutic element within the body 242 2002
 
COVIDIEN AG (39)
5,772,659 Electrosurgical generator power control circuit and method 192 1995
6,033,399 Electrosurgical generator with adaptive power control 440 1997
6,228,080 Electrosurgical generator with adaptive power control 330 1998
6,398,779 Vessel sealing system 384 1999
6,796,981 Vessel sealing system 269 2002
6,860,881 Multiple RF return pad contact detection system 107 2002
* 7,137,980 Method and system for controlling output of RF medical generator 219 2003
2006/0025,760 Blood detector for controlling anesu and method therefor 89 2003
RE40388 Electrosurgical generator with adaptive power control 73 2003
7,364,577 Vessel sealing system 98 2003
2008/0125,767 Thermocouple Measurement Circuit 69 2003
2004/0143,263 Compressible jaw configuration with bipolar RF output electrodes for soft tissue fusion 208 2003
7,131,860 Connector systems for electrosurgical generator 217 2003
7,044,948 Circuit for controlling arc energy from an electrosurgical generator 199 2003
7,147,638 Electrosurgical instrument which reduces thermal damage to adjacent tissue 235 2004
2005/0004,564 Method and system for programming and controlling an electrosurgical generator system 227 2004
2007/0093,800 Method and system for programming and controlling an electrosurgical generator system 56 2004
7,160,293 Multiple RF return pad contact detection system 85 2004
7,396,336 Switched resonant ultrasonic power amplifier system 160 2004
7,303,557 Vessel sealing system 219 2004
2005/0203,504 Method and system for controlling output of RF medical generator 218 2005
2005/0182,398 Method and system for continuity testing of medical electrodes 58 2005
2005/0197,659 Vessel sealing system using capacitive RF dielectric heating 180 2005
2006/0079,871 Universal foot switch contact port 52 2005
2007/0093,801 Circuit and method for reducing stored energy in an electrosurgical generator 60 2005
2007/0135,812 Laparoscopic apparatus for performing electrosurgical procedures 51 2005
2007/0173,810 Dual synchro-resonant electrosurgical apparatus with bi-directional magnetic coupling 49 2006
2006/0178,664 Circuit for controlling arc energy from an electrosurgical generator 53 2006
2007/0208,339 System and method for controlling electrosurgical snares 51 2006
2007/0225,698 System and method for generating radio frequency energy 45 2006
2007/0250,052 Arc based adaptive control system for an electrosurgical unit 45 2006
2007/0265,612 System and method for reducing leakage current in an electrosurgical generator 55 2006
2008/0039,831 System and method for measuring initial tissue impedance 75 2006
2008/0039,836 System and method for controlling RF output during tissue sealing 124 2006
2008/0082,094 Transformer for RF voltage sensing 47 2006
2007/0038,209 Method and system for controlling output of RF medical generator 56 2006
2007/0173,805 Method and system for controlling an output of a radio-frequency medical generator having an impedance based control algorithm 85 2007
2007/0173,806 System and method for closed loop monitoring of monopolar electrosurgical apparatus 148 2007
2008/0015,564 Method and system for programming and controlling an electrosurgical generator system 57 2007
 
LAZURE SCIENTIFIC, INC. (1)
5,908,444 Complex frequency pulsed electromagnetic generator and method of use 94 1997
 
MEDTRONIC VIDAMED, INC. (1)
6,855,141 Method for monitoring impedance to control power and apparatus utilizing same 86 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 208 1999
 
ABIOMED, INC. (1)
7,062,331 Methods and apparatus for providing a sufficiently stable power to a load in an energy transfer system 71 2002
 
G2 DESIGN LIMITED (3)
5,099,840 Diathermy unit 372 1989
5,423,810 Cauterising apparatus 425 1993
5,451,224 Apparatus for radio frequency bipolar electrosurgery 439 1993
 
YAZAKI CORPORATION (1)
5,961,344 Cam-actuated terminal connector 75 1997
 
HAIR FREE CENTERS, INC. (1)
4,372,315 Impedance sensing epilator 85 1980
 
FREESCALE SEMICONDUCTOR, INC. (1)
4,931,717 Load response control and method 78 1989
 
LIVE TISSUE CONNECT, INC. (3)
6,562,037 Bonding of soft biological tissues by passing high frequency electric current therethrough 318 1998
6,733,498 System and method for control of tissue welding 297 2002
2004/0068,304 Bonding of soft biological tissues by passing high freouency electric current therethrough 86 2003
 
INTEGRA ME GMBH (4)
5,133,711 Electric surgical high-frequency instrument 81 1990
5,976,128 Electrosurgical high frequency generator 154 1997
5,951,545 High-frequency surgical instrument and method of operating the same 97 1997
6,074,388 Electrically operated medical apparatus 87 1998
 
DIPOLAR LIMITED (1)
6,010,499 Electrosurgical cutting and coagulation apparatus 113 1997
 
DRG (UK) LIMITED (1)
4,384,582 Patient plate for diathermy apparatus, and diathermy apparatus fitted with it 108 1980
 
Omron Tateisi Electronics Co. (1)
4,993,430 Electrode device for high frequency thermotherapy apparatus 128 1989
 
MEDTRONIC CRYOCATH LP (1)
5,281,213 Catheter for ice mapping and ablation 548 1992
 
ORATEC INTERVENTIONS, INC. (3)
6,162,217 Method and apparatus for controlling a temperature-controlled probe 125 1999
6,350,262 Method and apparatus for applying thermal energy to tissue asymetrically 122 2000
6,939,346 Method and apparatus for controlling a temperature-controlled probe 186 2002
 
MEDTRONIC, INC. (17)
5,342,409 Position-responsive neuro stimulator 398 1991
5,674,217 Heart synchronized extractor for an implanted object 107 1993
5,534,018 Automatic lead recognition for implantable medical device 252 1994
5,643,330 Multichannel apparatus for epidural spinal cord stimulation 336 1996
5,702,429 Neural stimulation techniques with feedback 264 1996
5,938,690 Pain management system and method 371 1996
5,925,070 Techniques for adjusting the locus of excitation of electrically excitable tissue 190 1997
6,063,078 Method and apparatus for tissue ablation 194 1997
5,948,007 Dual channel implantation neurostimulation techniques 126 1997
5,814,092 Neural stimulation techniques with feedback 199 1997
5,836,990 Method and apparatus for determining electrode/tissue contact 196 1997
5,913,882 Neural stimulation techniques with feedback 215 1998
6,648,883 Ablation system and method of use 201 2002
6,849,073 Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue 285 2002
6,989,010 Ablation system and method of use 106 2003
7,367,972 Ablation system 101 2003
* 7,247,155 Apparatus and method for creating, maintaining, and controlling a virtual electrode used for the ablation of tissue 150 2004
 
MICROLINE SURGICAL, INC. (4)
5,836,943 Electrosurgical generator 130 1996
6,238,387 Electrosurgical generator 168 1998
6,692,489 Electrosurgical mode conversion system 121 2000
7,175,621 Electrosurgical mode conversion system 77 2003
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
4,788,634 Resonant forward converter 123 1987
 
ENTEGRIS, INC. (1)
2004/0121,494 Infrared thermopile detector system for semiconductor process monitoring and control 1 2003
 
JPMORGAN CHASE BANK, AS COLLATERAL AGENT (1)
* 5,445,638 Bipolar coagulation and cutting forceps 491 1993
 
MEDTRONIC CARDIORHYTHM (2)
5,540,681 Method and system for radiofrequency ablation of tissue 371 1994
5,584,830 Method and system for radiofrequency ablation of cardiac tissue 180 1994
 
GYRUS MEDICAL LIMITED CHARTERHOUSE (1)
5,438,302 Electrosurgical radiofrequency generator having regulated voltage across switching device 534 1994
 
ENGINEERING & RESEARCH ASSOCIATES, INC. (1)
5,868,737 Apparatus and method for determining ablation 134 1997
 
E.P. Technologies Inc. (1)
5,722,975 Systems for radiofrequency ablation with phase sensitive power detection and control 153 1995
 
Aspen Laboratories, Inc. (2)
4,569,345 High output electrosurgical unit 92 1984
4,848,335 Return electrode contact monitor 122 1988
 
GENERAL ELECTRIC COMPANY (1)
4,559,496 LCD Hook-on digital ammeter 75 1984
 
STORZ INSTRUMENT COMPANY (2)
5,249,121 Remote control console for surgical control system 189 1989
5,157,603 Control system for ophthalmic surgical instruments 108 1989
 
ST. JUDE MEDICAL, INC. (1)
5,300,068 Electrosurgical apparatus 393 1992
 
INTACT MEDICAL CORPORATION (3)
6,740,079 Electrosurgical generator 156 2001
7,004,174 Electrosurgery with infiltration anesthesia 82 2002
6,923,804 Electrosurgical generator 153 2003
 
KAMIYAMA, HIROYASU (1)
5,151,102 Blood vessel coagulation/stanching device 451 1990
 
STORZ ENDOSKOP GMBH (3)
6,261,285 High-frequency surgical device and operation monitoring device for a high-frequency surgical device 68 1998
6,275,786 Device for monitoring a neutral electrode during HF surgery 96 1999
6,864,686 High-frequency surgical device and operation monitoring device for a high-frequency surgical device 93 2002
 
B.F. GOODRICH COMPANY, THE (1)
4,514,619 Indirect current monitoring via voltage and impedance monitoring 101 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 348 1982
 
DELL PRODUCTS L.P. (1)
6,693,782 Surge suppression for current limiting circuits 57 2000
 
ARTHROCARE CORPORATION (3)
6,142,992 Power supply for limiting power in electrosurgery 277 1998
6,235,020 Power supply and methods for fluid delivery in electrosurgery 309 1998
6,296,636 Power supply and methods for limiting power in electrosurgery 294 1999
 
BAUSCH & LOMB INCORPORATED (1)
6,055,458 Modes/surgical functions 90 1997
 
REFRACTEC, INC. (1)
5,749,871 Method and apparatus for modifications of visual acuity by thermal means 117 1994
 
ERICSSON RAYNET (2)
5,694,304 High efficiency resonant switching converters 85 1995
5,712,772 Controller for high efficiency resonant switching converters 128 1995
 
RDM International, Inc. (1)
4,644,955 Circuit apparatus and method for electrothermal treatment of cancer eye 91 1985
 
MAQUET CARDIOVASCULAR LLC (1)
2004/0102,772 Apparatus and method for minimally invasive surgery using rotational cutting tool 8 2003
 
ESC MEDICAL SYSTEMS LTD. (1)
5,556,396 Method for tubal electroligation 267 1995
 
SENORX, INC. (2)
6,620,157 High frequency power source 166 2000
7,175,618 High frequency power source 55 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 5 2011
 
Coviden IP (1)
D680220 Slider handle for laparoscopic device 2 2012
 
COVIDIEN AG (9)
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 5 2011
8,647,340 Thermocouple measurement system 0 2012
8,485,993 Switched resonant ultrasonic power amplifier system 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 12 2012
8,966,981 Switched resonant ultrasonic power amplifier system 0 2013
 
COVIDIEN LP (9)
* 8,215,182 Apparatus and method for measuring pressure between jaw members 10 2008
9,033,973 System and method for DC tissue impedance sensing 0 2011
8,898,888 System for manufacturing electrosurgical seal plates 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 2 2012
8,523,898 Endoscopic electrosurgical jaws with offset knife 2 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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