WO2005011465A3 - Electrosurgical generator - Google Patents

Electrosurgical generator Download PDF

Info

Publication number
WO2005011465A3
WO2005011465A3 PCT/US2004/022176 US2004022176W WO2005011465A3 WO 2005011465 A3 WO2005011465 A3 WO 2005011465A3 US 2004022176 W US2004022176 W US 2004022176W WO 2005011465 A3 WO2005011465 A3 WO 2005011465A3
Authority
WO
WIPO (PCT)
Prior art keywords
link voltage
output
utilization
electrosurgical generator
power
Prior art date
Application number
PCT/US2004/022176
Other languages
French (fr)
Other versions
WO2005011465A2 (en
Inventor
Philip E Eggers
John Kociecki
Mark A Mayerchak
Original Assignee
Neothermia Corp
Philip E Eggers
John Kociecki
Mark A Mayerchak
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 Neothermia Corp, Philip E Eggers, John Kociecki, Mark A Mayerchak filed Critical Neothermia Corp
Priority to EP04777950A priority Critical patent/EP1648324A4/en
Priority to AU2004260648A priority patent/AU2004260648A1/en
Priority to CA002529758A priority patent/CA2529758A1/en
Publication of WO2005011465A2 publication Critical patent/WO2005011465A2/en
Publication of WO2005011465A3 publication Critical patent/WO2005011465A3/en
Priority to IL173247A priority patent/IL173247A0/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/1206—Generators therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00875—Resistance or impedance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/1206—Generators therefor
    • A61B2018/1213—Generators therefor creating an arc
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical 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
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1475—Electrodes retractable in or deployable from a housing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration
    • A61B2218/008—Aspiration for smoke evacuation

Abstract

An electrosurgical generator which provides a constant power output particularly suited for cutting arc formation at an active electrode which exhibits a dynamic active surface area of varying geometry. Essentially constant power-based control is achieved through the utilization of a d.c. link voltage the level of which functions to establish the amplitude of the output of an RF resonant inverter. A dual loop feedback control is described wherein output power based control signals are slowly introduced at low gain, while link voltage based controls are comparatively rapidly applied. Enhanced development of a controlling d.c. link voltage is achieved through the utilization of an input network incorporating a power factor correction stage.
PCT/US2004/022176 2003-08-01 2004-07-12 Electrosurgical generator WO2005011465A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP04777950A EP1648324A4 (en) 2003-08-01 2004-07-12 Electrosurgical generator
AU2004260648A AU2004260648A1 (en) 2003-08-01 2004-07-12 Electrosurgical generator
CA002529758A CA2529758A1 (en) 2003-08-01 2004-07-12 Electrosurgical generator
IL173247A IL173247A0 (en) 2003-08-01 2006-01-19 Electrosurgical generator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/633,031 US6923804B2 (en) 2001-07-12 2003-08-01 Electrosurgical generator
US10/633,031 2003-08-01

Publications (2)

Publication Number Publication Date
WO2005011465A2 WO2005011465A2 (en) 2005-02-10
WO2005011465A3 true WO2005011465A3 (en) 2005-10-06

Family

ID=34115818

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/022176 WO2005011465A2 (en) 2003-08-01 2004-07-12 Electrosurgical generator

Country Status (6)

Country Link
US (1) US6923804B2 (en)
EP (1) EP1648324A4 (en)
AU (1) AU2004260648A1 (en)
CA (1) CA2529758A1 (en)
IL (1) IL173247A0 (en)
WO (1) WO2005011465A2 (en)

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