CA2220921A1 - Control apparatus for electrosurgical generator power output - Google Patents

Control apparatus for electrosurgical generator power output

Info

Publication number
CA2220921A1
CA2220921A1 CA002220921A CA2220921A CA2220921A1 CA 2220921 A1 CA2220921 A1 CA 2220921A1 CA 002220921 A CA002220921 A CA 002220921A CA 2220921 A CA2220921 A CA 2220921A CA 2220921 A1 CA2220921 A1 CA 2220921A1
Authority
CA
Canada
Prior art keywords
electrosurgical generator
control apparatus
generator
microprocessor
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002220921A
Other languages
French (fr)
Other versions
CA2220921C (en
Inventor
William G. Paterson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valleylab Inc
Original Assignee
Valleylab, Inc.
William G. Paterson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valleylab, Inc., William G. Paterson filed Critical Valleylab, Inc.
Publication of CA2220921A1 publication Critical patent/CA2220921A1/en
Application granted granted Critical
Publication of CA2220921C publication Critical patent/CA2220921C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/1206Generators therefor

Abstract

A power control apparatus for an electrosurgical generator (10) is used for controlling output power from the generator (10) to the tissue or bodily fluids of a patient (11). The control apparatus rapidly determines the range of impedance of the load on the electrosurgical generator (10) and adjusts the output power accordingly. Output current and output voltage from the electrosurgical generator (10) are monitored and sent to a microprocessor (18). The microprocessor (18) runs an algorithm that rapidly determines the impedance range of the load on the generator (10). The algorithm uses computational techniques, such as comparisons and bit shifting, that avoid long division and other time-consuming operations. The microprocessor (18) can then adjust a high voltage power supply (15) that effects the radio frequency amplifier stage. A method for controlling the power of the electrosurgical generator (10), including steps in the algorithm, is also disclosed.
CA002220921A 1995-06-06 1996-06-03 Control apparatus for electrosurgical generator power output Expired - Fee Related CA2220921C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/468,950 1995-06-06
US08/468,950 US5599344A (en) 1995-06-06 1995-06-06 Control apparatus for electrosurgical generator power output
PCT/IB1996/000552 WO1996039089A1 (en) 1995-06-06 1996-06-03 Control apparatus for electrosurgical generator power output

Publications (2)

Publication Number Publication Date
CA2220921A1 true CA2220921A1 (en) 1996-12-12
CA2220921C CA2220921C (en) 2002-02-05

Family

ID=23861863

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002220921A Expired - Fee Related CA2220921C (en) 1995-06-06 1996-06-03 Control apparatus for electrosurgical generator power output

Country Status (9)

Country Link
US (1) US5599344A (en)
EP (1) EP0830094B1 (en)
JP (1) JP2972350B2 (en)
AT (1) ATE196233T1 (en)
AU (1) AU708147B2 (en)
CA (1) CA2220921C (en)
DE (1) DE69610309T2 (en)
ES (1) ES2150125T3 (en)
WO (1) WO1996039089A1 (en)

Families Citing this family (616)

* Cited by examiner, † Cited by third party
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JPH10509368A (en) 1998-09-14
EP0830094A1 (en) 1998-03-25
CA2220921C (en) 2002-02-05
AU708147B2 (en) 1999-07-29
ATE196233T1 (en) 2000-09-15
AU5701096A (en) 1996-12-24
EP0830094B1 (en) 2000-09-13
JP2972350B2 (en) 1999-11-08
MX9709020A (en) 1998-03-31
DE69610309D1 (en) 2000-10-19
US5599344A (en) 1997-02-04
DE69610309T2 (en) 2001-02-22
WO1996039089A1 (en) 1996-12-12
ES2150125T3 (en) 2000-11-16

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