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 RHEINFALL641

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Denham, Amy Boulder, CO 11 518
Odom, Darren Longmont, CO 29 1387
Weinberg, Craig Denver, CO 42 1684

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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ETHICON ENDO-SURGERY, INC. (11)
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DENTSPLY RESEARCH & DEVELOPMENT CORP. (1)
4,200,105 Electrosurgical safety circuit 104 1978
 
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DIPOLAR LIMITED (1)
6,010,499 Electrosurgical cutting and coagulation apparatus 109 1997
 
DRG (UK) LIMITED (1)
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ENERGY, UNITED STATES DEPARTMENT OF (1)
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4,931,717 Load response control and method 75 1989
 
GARITO, JON C. (1)
4,463,759 Universal finger/foot switch adaptor for tube-type electrosurgical instrument 134 1982
 
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5,438,302 Electrosurgical radiofrequency generator having regulated voltage across switching device 477 1994
 
GYRUS MEDICAL, INC. (1)
4,903,696 Electrosurgical generator 173 1988
 
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4,372,315 Impedance sensing epilator 83 1980
 
Hemostatix Corporation (1)
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5,414,238 Resonant power supply for an arcjet thruster 87 1992
 
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4,566,454 Selected frequency hair removal device and method 77 1981
 
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5,370,672 Computer-controlled neurological stimulation system 215 1992
 
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5,385,148 Cardiac imaging and ablation catheter 530 1993
 
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5,520,684 Transurethral radio frequency apparatus for ablation of the prostate gland and method 332 1994
 
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5,417,719 Method of using a spinal cord stimulation lead 300 1993
 
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5,961,344 Cam-actuated terminal connector 73 1997
 
Other [Check patent profile for assignment information] (20)
4,209,018 Tissue coagulation apparatus and method 104 1978
4,321,926 Insertion detecting probe and electrolysis system 91 1979
4,343,308 Surgical ground detector 98 1980
4,492,231 Non-sticking electrocautery system and forceps 525 1982
4,472,661 High voltage, low power transformer for efficiently firing a gas discharge luminous display 79 1982
4,657,015 Control device for a high frequency surgical apparatus 135 1985
4,651,280 Electrosurgical control system using tissue conductivity 118 1985
4,741,334 Monitoring arrangement for a high frequency surgery device 104 1986
4,754,757 Method and apparatus for monitoring the surface contact of a neutral electrode of a HF-surgical apparatus 122 1986
4,890,610 Bipolar forceps 123 1989
5,108,389 Automatic smoke evacuator activator system for a surgical laser apparatus and method therefor 103 1990
5,430,434 Portable surgical early warning device 75 1993
5,921,982 Systems and methods for ablating body tissue 389 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 295 1997
6,132,429 Radiofrequency medical instrument and methods for luminal welding 109 1999
2003/0199,863 Systems and methods for controlling power in an electrosurgical probe 123 2002
2003/0181,898 RF filter for an electrosurgical generator 70 2003
2004/0015,216 Self-evacuating electrocautery device 77 2003
2004/0167,508 Vessel sealing system 52 2004
2005/0004,569 Coagulating electrosurgical instrument with tissue dam 129 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 5 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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