Patent US3674031A successfully refreshed from Google Patents.
US3674031A
Expired / Lapsed
US
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Method of and device for cryogenic surgery
Assignee: Linde GmbH
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Filing: 1970-03-25
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Granted: 1972-07-04
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Expires: 1990-03-25
Abstract
Abstract A system for performing cryogenic surgery, especially the removal or treatment of mammalian tissue such as tonsil tissue, wherein the tissue is drawn by suction into the cavity of an instrument the walls of which are chilled, e.g., by liquid nitrogen.
Inventors
- 👤 Hans-Joachim Weiche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:43
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/02; A61B17/00; A61B17/30; A61B2017/306
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A method of cold-treating soft material, comprising the steps of juxtaposing with a body of cell tissue, a rigid thermally conductive metal shell concave in the direction of said cell tissue; evacuating said shell to draw a portion of said cell tissue into said concavity and into contact with one side of the wall thereof; contacting the other side of the wall of said shell with a LIQUEFIED-GAS cooling medium at a temperature sufficient to cause necrosis of said cell tissue; and transmitting cold through the wall of said shell to the portion of cell tissue drawn into said concavity and into contact with said shell.
Claim 2
Independent Claim
106 words
A method of cold-treating soft material, comprising the steps of juxtaposing with a body of cell tissue, a rigid thermally conductive metal shell concave in the direction of said cell tissue; evacuating said shell to draw a portion of said cell tissue into said concavity and into contact with one side of the wall thereof; contacting the other side of the wall of said shell with a LIQUEFIED-GAS cooling medium at a temperature sufficient to cause necrosis of said cell tissue; and transmitting cold through the wall of said shell to the portion of cell tissue drawn into said concavity and into contact with said shell.
Claim 3
Dependent Claim
50 words
The method defined in claim 1 wherein said flexible material is tonsil tissue and said medium is liquid nitrogen, said method further comprising the step of withdrawing said shell from said body while maintaining suction in said concavity subsequent to the transfer of cold to said portion of said material.
Claim 4
Dependent Claim
144 words
An instrument for cryogenic surgery upon mammalian cell tissue, comprising: an elongated handle; a rigid metal cup mounted on an end of said handle and having a concavity adapted to be applied to said tissue, said cup being formed with a pair of spaceD-apart walls defining an interwall compartment and including an inner wall and an outer wall; conduit means connected to said cup and communicating with said concavity; a suction pump connected to said conduit means for evacuating said concavity and drawing said tissue against the inner wall. a first tube and a second tube extending along said handle and communicating with said compartment; and a source of cooling fluid at a temperature sufficiently low to cause necrosis of said tissue connected to one of said tubes for passage of said fluid through said compartment and from said compartment through the other tube.
Claim 5
Dependent Claim
144 words
An instrument for cryogenic surgery upon mammalian cell tissue, comprising: an elongated handle; a rigid metal cup mounted on an end of said handle and having a concavity adapted to be applied to said tissue, said cup being formed with a pair of spaceD-apart walls defining an interwall compartment and including an inner wall and an outer wall; conduit means connected to said cup and communicating with said concavity; a suction pump connected to said conduit means for evacuating said concavity and drawing said tissue against the inner wall. a first tube and a second tube extending along said handle and communicating with said compartment; and a source of cooling fluid at a temperature sufficiently low to cause necrosis of said tissue connected to one of said tubes for passage of said fluid through said compartment and from said compartment through the other tube.
Claim 6
Dependent Claim
14 words
The instrument defined in claim 3 wherein said tubes are coaxial with one another.
Claim 7
Dependent Claim
17 words
The instrument defined in claim 4 wherein said source is connected to the innermost of said tubes.
Claim 8
Dependent Claim
18 words
The instrument defined in claim 5 wherein said cup is formed with a rounded rim about said concavity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |