CA2107459A1 - Instrument for Cutting, Coagulating and Ablating Tissue - Google Patents

Instrument for Cutting, Coagulating and Ablating Tissue

Info

Publication number
CA2107459A1
CA2107459A1 CA2107459A CA2107459A CA2107459A1 CA 2107459 A1 CA2107459 A1 CA 2107459A1 CA 2107459 A CA2107459 A CA 2107459A CA 2107459 A CA2107459 A CA 2107459A CA 2107459 A1 CA2107459 A1 CA 2107459A1
Authority
CA
Canada
Prior art keywords
rod
base
tip
temperature
ferromagnetic
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
CA2107459A
Other languages
French (fr)
Other versions
CA2107459C (en
Inventor
Steven A. Daniel
Mark J. Cowell
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.)
Metcal Inc
Original Assignee
Steven A. Daniel
Mark J. Cowell
Metcal, Inc.
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 Steven A. Daniel, Mark J. Cowell, Metcal, Inc. filed Critical Steven A. Daniel
Publication of CA2107459A1 publication Critical patent/CA2107459A1/en
Application granted granted Critical
Publication of CA2107459C publication Critical patent/CA2107459C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • A61B18/08—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by means of electrically-heated probes
    • A61B18/082—Probes or electrodes therefor

Abstract

An instrument for cutting, ablating; and coagulating tissue has a rod (4) of ferromagnetic material fusion welded to the base of a conical tip (2) of copper with the rod adjacent the base of the conic being of lesser diameter than the base to provide a region to accept a potted coil (8) of wire about the rod whereby when the coil is connected to a constant current high frequency source the rod and tip are heated to a temperature approaching the Curie temperature of the ferromagnetic rod. As Curie temperature is approached the rod becomes essentially non-magnetic, heating decreases to produce a temperature below Curie temperature and the cycle repeats. As a result of the excellent heat exchange interfaces produced by fusion welding the energy delivered to the tissue or other load which may be non-biological is closely controlled by temperature which is self regulated. A ferromagnetic sleeve is placed about the coil to concentrate magnetic flux in the rod. An outer sleeve spaced radially from the ferromagnetic sleeve and of relatively non-heat conductive material extends from the base of the tip away from the tip to provide a handle for the instrument.
CA002107459A 1991-04-05 1992-04-03 Instrument for cutting, coagulating and ablating tissue Expired - Fee Related CA2107459C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US68085991A 1991-04-05 1991-04-05
US680,859 1991-04-05
PCT/US1992/002767 WO1992017121A1 (en) 1991-04-05 1992-04-03 Instrument for cutting, coagulating and ablating tissue

Publications (2)

Publication Number Publication Date
CA2107459A1 true CA2107459A1 (en) 1992-10-06
CA2107459C CA2107459C (en) 1999-05-04

Family

ID=24732814

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002107459A Expired - Fee Related CA2107459C (en) 1991-04-05 1992-04-03 Instrument for cutting, coagulating and ablating tissue

Country Status (6)

Country Link
US (1) US5425731A (en)
EP (1) EP0578771B1 (en)
JP (1) JP2558584B2 (en)
CA (1) CA2107459C (en)
DE (1) DE69230494T2 (en)
WO (1) WO1992017121A1 (en)

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US9898937B2 (en) 2012-09-28 2018-02-20 Applied Medical Resources Corporation Surgical training model for laparoscopic procedures
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Also Published As

Publication number Publication date
DE69230494D1 (en) 2000-02-03
WO1992017121A1 (en) 1992-10-15
EP0578771B1 (en) 1999-12-29
JPH06504705A (en) 1994-06-02
US5425731A (en) 1995-06-20
CA2107459C (en) 1999-05-04
DE69230494T2 (en) 2000-06-08
EP0578771A4 (en) 1995-02-22
JP2558584B2 (en) 1996-11-27
EP0578771A1 (en) 1994-01-19

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