GB2022974A - Improved electrically heated apparatus and method and material - Google Patents

Improved electrically heated apparatus and method and material

Info

Publication number
GB2022974A
GB2022974A GB7911705A GB7911705A GB2022974A GB 2022974 A GB2022974 A GB 2022974A GB 7911705 A GB7911705 A GB 7911705A GB 7911705 A GB7911705 A GB 7911705A GB 2022974 A GB2022974 A GB 2022974A
Authority
GB
United Kingdom
Prior art keywords
layer
current
element
permeability
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.)
Withdrawn
Application number
GB7911705A
Original Assignee
Shaw R F
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
Priority to US89838878A priority Critical
Application filed by Shaw R F filed Critical Shaw R F
Publication of GB2022974A publication Critical patent/GB2022974A/en
Application status is Withdrawn legal-status Critical

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

Abstract

A self-regulating resistive electric heating element consists of a two- layer laminate, the first layer having high electrical conductivity and low magnetic permeability and being itself, as described a laminate comprising a sandwich of cutting steel 21, Fig. 2, between two layers of metal 23 such as silver or copper, and the second layer 25 having a high permeability and a low conductivity and being of ferromagnetic material. If an r.f. current is passed through such an element using an additional conductive layer 29 insulated 27 from the element as the return conductor, at low temperatures the majority of the current will pass, owing to the skin effect, through the thin ferromagnetic layer and thereby cause heating, but as the temperature rises towards the Curie point of the ferromagnetic layer, its permeability falls, the skin depth increases, and as a consequence less current is carried by the ferromagnetic layer and more by the other layer 21, 23, which results in a net drop in the rate of generation of heat. As described the composite heating element is sharpened to a cutting edge 15 and forms part of a surgical scalpel. <IMAGE>
GB7911705A 1978-04-20 1979-04-04 Improved electrically heated apparatus and method and material Withdrawn GB2022974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US89838878A true 1978-04-20 1978-04-20

Publications (1)

Publication Number Publication Date
GB2022974A true GB2022974A (en) 1979-12-19

Family

ID=25409375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911705A Withdrawn GB2022974A (en) 1978-04-20 1979-04-04 Improved electrically heated apparatus and method and material

Country Status (6)

Country Link
JP (2) JPS6232938B2 (en)
BR (1) BR7902444A (en)
DE (1) DE2914401A1 (en)
FR (1) FR2428279A1 (en)
GB (1) GB2022974A (en)
NL (1) NL7903018A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8292879B2 (en) 2009-04-17 2012-10-23 Domain Surgical, Inc. Method of treatment with adjustable ferromagnetic coated conductor thermal surgical tool
US8617151B2 (en) 2009-04-17 2013-12-31 Domain Surgical, Inc. System and method of controlling power delivery to a surgical instrument
US8858544B2 (en) 2011-05-16 2014-10-14 Domain Surgical, Inc. Surgical instrument guide
US8915909B2 (en) 2011-04-08 2014-12-23 Domain Surgical, Inc. Impedance matching circuit
US8932279B2 (en) 2011-04-08 2015-01-13 Domain Surgical, Inc. System and method for cooling of a heated surgical instrument and/or surgical site and treating tissue
US9078655B2 (en) 2009-04-17 2015-07-14 Domain Surgical, Inc. Heated balloon catheter
US9107666B2 (en) 2009-04-17 2015-08-18 Domain Surgical, Inc. Thermal resecting loop
US9131977B2 (en) 2009-04-17 2015-09-15 Domain Surgical, Inc. Layered ferromagnetic coated conductor thermal surgical tool
US9265556B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Thermally adjustable surgical tool, balloon catheters and sculpting of biologic materials
US9526558B2 (en) 2011-09-13 2016-12-27 Domain Surgical, Inc. Sealing and/or cutting instrument
US10357306B2 (en) 2014-05-14 2019-07-23 Domain Surgical, Inc. Planar ferromagnetic coated surgical tip and method for making

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481057A (en) * 1980-10-28 1984-11-06 Oximetrix, Inc. Cutting device and method of manufacture
JPH0320664U (en) * 1989-07-06 1991-02-28
JP2558584B2 (en) * 1991-04-05 1996-11-27 メトカル・インコーポレーテッド Instrument for cutting body tissue, it solidifies and is removed
US6230603B1 (en) * 1996-04-29 2001-05-15 Zbigniew Kubala Cutting blade for resistance-heated elastomer cutters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1077366A (en) * 1975-03-14 1980-05-13 Robert F. Shaw Surgical instrument having self-regulated electrical skin-depth heating of its cutting edge and method of using the same
US4091813A (en) * 1975-03-14 1978-05-30 Robert F. Shaw Surgical instrument having self-regulated electrical proximity heating of its cutting edge and method of using the same

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8292879B2 (en) 2009-04-17 2012-10-23 Domain Surgical, Inc. Method of treatment with adjustable ferromagnetic coated conductor thermal surgical tool
US8372066B2 (en) 2009-04-17 2013-02-12 Domain Surgical, Inc. Inductively heated multi-mode surgical tool
US8377052B2 (en) 2009-04-17 2013-02-19 Domain Surgical, Inc. Surgical tool with inductively heated regions
US8414569B2 (en) 2009-04-17 2013-04-09 Domain Surgical, Inc. Method of treatment with multi-mode surgical tool
US8419724B2 (en) 2009-04-17 2013-04-16 Domain Surgical, Inc. Adjustable ferromagnetic coated conductor thermal surgical tool
US8425503B2 (en) 2009-04-17 2013-04-23 Domain Surgical, Inc. Adjustable ferromagnetic coated conductor thermal surgical tool
US8430870B2 (en) 2009-04-17 2013-04-30 Domain Surgical, Inc. Inductively heated snare
US8491578B2 (en) 2009-04-17 2013-07-23 Domain Surgical, Inc. Inductively heated multi-mode bipolar surgical tool
US8506561B2 (en) 2009-04-17 2013-08-13 Domain Surgical, Inc. Catheter with inductively heated regions
US8523852B2 (en) 2009-04-17 2013-09-03 Domain Surgical, Inc. Thermally adjustable surgical tool system
US8523851B2 (en) 2009-04-17 2013-09-03 Domain Surgical, Inc. Inductively heated multi-mode ultrasonic surgical tool
US8523850B2 (en) 2009-04-17 2013-09-03 Domain Surgical, Inc. Method for heating a surgical implement
US8617151B2 (en) 2009-04-17 2013-12-31 Domain Surgical, Inc. System and method of controlling power delivery to a surgical instrument
US10213247B2 (en) 2009-04-17 2019-02-26 Domain Surgical, Inc. Thermal resecting loop
US10149712B2 (en) 2009-04-17 2018-12-11 Domain Surgical, Inc. Layered ferromagnetic coated conductor thermal surgical tool
US9730749B2 (en) 2009-04-17 2017-08-15 Domain Surgical, Inc. Surgical scalpel with inductively heated regions
US9265553B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Inductively heated multi-mode surgical tool
US9107666B2 (en) 2009-04-17 2015-08-18 Domain Surgical, Inc. Thermal resecting loop
US9131977B2 (en) 2009-04-17 2015-09-15 Domain Surgical, Inc. Layered ferromagnetic coated conductor thermal surgical tool
US9549774B2 (en) 2009-04-17 2017-01-24 Domain Surgical, Inc. System and method of controlling power delivery to a surgical instrument
US9220557B2 (en) 2009-04-17 2015-12-29 Domain Surgical, Inc. Thermal surgical tool
US9265555B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Multi-mode surgical tool
US9265556B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Thermally adjustable surgical tool, balloon catheters and sculpting of biologic materials
US9265554B2 (en) 2009-04-17 2016-02-23 Domain Surgical, Inc. Thermally adjustable surgical system and method
US9078655B2 (en) 2009-04-17 2015-07-14 Domain Surgical, Inc. Heated balloon catheter
US9320560B2 (en) 2009-04-17 2016-04-26 Domain Surgical, Inc. Method for treating tissue with a ferromagnetic thermal surgical tool
US9149321B2 (en) 2011-04-08 2015-10-06 Domain Surgical, Inc. System and method for cooling of a heated surgical instrument and/or surgical site and treating tissue
US8932279B2 (en) 2011-04-08 2015-01-13 Domain Surgical, Inc. System and method for cooling of a heated surgical instrument and/or surgical site and treating tissue
US8915909B2 (en) 2011-04-08 2014-12-23 Domain Surgical, Inc. Impedance matching circuit
US8858544B2 (en) 2011-05-16 2014-10-14 Domain Surgical, Inc. Surgical instrument guide
US9526558B2 (en) 2011-09-13 2016-12-27 Domain Surgical, Inc. Sealing and/or cutting instrument
US10357306B2 (en) 2014-05-14 2019-07-23 Domain Surgical, Inc. Planar ferromagnetic coated surgical tip and method for making

Also Published As

Publication number Publication date
BR7902444A (en) 1979-10-23
JPS54164389A (en) 1979-12-27
JPH0351179B2 (en) 1991-08-06
JPS62129048A (en) 1987-06-11
FR2428279A1 (en) 1980-01-04
JPS6232938B2 (en) 1987-07-17
NL7903018A (en) 1979-10-23
DE2914401A1 (en) 1979-10-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)