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

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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Patent Owner(s)

Patent OwnerAddressTotal Patents
COVIDIEN AGNEUHAUSEN AM RHEINFALL646

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Denham, Amy Boulder, CO 11 521
Odom, Darren Longmont, CO 30 1411
Weinberg, Craig Denver, CO 42 1716

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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2006/0025,760 Blood detector for controlling anesu and method therefor 86 2003
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2008/0125,767 Thermocouple Measurement Circuit 64 2003
2004/0143,263 Compressible jaw configuration with bipolar RF output electrodes for soft tissue fusion 195 2003
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2006/0079,871 Universal foot switch contact port 51 2005
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CONMED CORPORATION (14)
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ETHICON ENDO-SURGERY, INC. (11)
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6,508,815 Radio-frequency generator for powering an ablation device 229 1999
 
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DENTSPLY RESEARCH & DEVELOPMENT CORP. (1)
4,200,105 Electrosurgical safety circuit 107 1978
 
Diapulse Corporation of America (1)
6,458,121 Apparatus for athermapeutic medical treatments 119 1996
 
DIPOLAR LIMITED (1)
6,010,499 Electrosurgical cutting and coagulation apparatus 110 1997
 
DRG (UK) LIMITED (1)
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ELEKTA AB (PUBL) (1)
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ENERGY, UNITED STATES DEPARTMENT OF (1)
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ENGINEERING & RESEARCH ASSOCIATES, INC. (1)
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ESC MEDICAL SYSTEMS LTD. (1)
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ETHICON, INC. (1)
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GARITO, JON C. (1)
4,463,759 Universal finger/foot switch adaptor for tube-type electrosurgical instrument 135 1982
 
GOLDMAN SACHS BANK USA (1)
2004/0121,494 Infrared thermopile detector system for semiconductor process monitoring and control 2003
 
GYRUS MEDICAL LIMITED CHARTERHOUSE (1)
5,438,302 Electrosurgical radiofrequency generator having regulated voltage across switching device 486 1994
 
GYRUS MEDICAL, INC. (1)
4,903,696 Electrosurgical generator 175 1988
 
HAIR FREE CENTERS, INC. (1)
4,372,315 Impedance sensing epilator 84 1980
 
Hemostatix Corporation (1)
5,400,267 Local in-device memory feature for electrically powered medical equipment 400 1992
 
HENRY, MCCORD, BEAN & MILLER, P.L.L.C. (1)
5,792,138 Cordless bipolar electrocautery unit with automatic power control 137 1996
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
5,729,448 Low cost highly manufacturable DC-to-DC power converter 95 1996
 
HUGHES ELECTRONICS CORPORATION (1)
4,992,719 Stable high voltage pulse power supply 55 1989
 
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5,409,485 Power supply apparatus for electrosurgical unit including electrosurgical-current waveform data storage 94 1993
 
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6,524,308 Electrode arrangement for electrothermal treatment of human or animal bodies 78 2000
 
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5,151,102 Blood vessel coagulation/stanching device 428 1990
 
KIRWAN SURGICAL PRODUCTS LLC (1)
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MEDICAL RESEARCH ASSOCIATES, LTD., #2 (1)
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4,566,454 Selected frequency hair removal device and method 78 1981
 
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4,644,955 Circuit apparatus and method for electrothermal treatment of cancer eye 89 1985
 
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The Johns Hopkins University (1)
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5,385,148 Cardiac imaging and ablation catheter 539 1993
 
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5,417,719 Method of using a spinal cord stimulation lead 305 1993
 
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Other [Check patent profile for assignment information] (20)
4,209,018 Tissue coagulation apparatus and method 106 1978
4,321,926 Insertion detecting probe and electrolysis system 92 1979
4,343,308 Surgical ground detector 101 1980
4,492,231 Non-sticking electrocautery system and forceps 528 1982
4,472,661 High voltage, low power transformer for efficiently firing a gas discharge luminous display 80 1982
4,657,015 Control device for a high frequency surgical apparatus 139 1985
4,651,280 Electrosurgical control system using tissue conductivity 120 1985
4,741,334 Monitoring arrangement for a high frequency surgery device 107 1986
4,754,757 Method and apparatus for monitoring the surface contact of a neutral electrode of a HF-surgical apparatus 127 1986
4,890,610 Bipolar forceps 124 1989
5,108,389 Automatic smoke evacuator activator system for a surgical laser apparatus and method therefor 104 1990
5,430,434 Portable surgical early warning device 77 1993
5,921,982 Systems and methods for ablating body tissue 398 1997
5,951,546 Electrosurgical instrument for tissue ablation, an apparatus, and a method for providing a lesion in damaged and diseased tissue from a mammal 303 1997
6,132,429 Radiofrequency medical instrument and methods for luminal welding 110 1999
2003/0199,863 Systems and methods for controlling power in an electrosurgical probe 127 2002
2003/0181,898 RF filter for an electrosurgical generator 71 2003
2004/0015,216 Self-evacuating electrocautery device 77 2003
2004/0167,508 Vessel sealing system 54 2004
2005/0004,569 Coagulating electrosurgical instrument with tissue dam 130 2004

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
COVIDIEN AG (8)
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 0 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 0 2012
 
COVIDIEN LP (5)
8,215,182 Apparatus and method for measuring pressure between jaw members 7 2008
8,568,444 Method of transferring rotational motion in an articulating surgical instrument 0 2012
8,454,602 Apparatus, system, and method for performing an electrosurgical procedure 0 2012
8,523,898 Endoscopic electrosurgical jaws with offset knife 0 2012
8,486,061 Imaginary impedance process monitoring and intelligent shut-off 0 2012
 
Coviden IP (1)
D680220 Slider handle for laparoscopic device 1 2012

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