Patent US4651734A successfully refreshed from Google Patents.
US4651734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrosurgical device for both mechanical cutting and coagulation of bleeding
Assignee: University of California, San Diego
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Filing: 1985-02-08
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Granted: 1987-03-24
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Expires: 2005-02-08
Abstract
Abstract Bipolar electrical coagulation of tissue using radio-frequency energy is combined with the functions of conventional surgical pressure tissue cutting instruments without significant modification thereof in a single instrument with the result that a surgeon can perform both procedures without having to redirect his attention from the area of the surgery.
Inventors
- 👤 James D. Doss
- 👤 Charles W. McCabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:41
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B2018/00053; A61B2018/00184; A61B2018/00196
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
A surgical instrument for cutting and coagulating tissue, said surgical instrument comprising in combination: means for pressure cutting, said pressure cutting means serving as a first electrode and having a leading edge and a cutting surface, the leading edge of said means for pressure cutting forming the forward portion of the cutting surface; second electrode means set apart from and electrically insulated from said pressure cutting means on the side of said pressure cutting means opposite the cutting surface thereof; means for attaching said second electrode means to said pressure cutting means; and means for providing a voltage between said pressure cutting means and said second electrode means, whereby an electric current can be made to flow between a portion of the side of said pressure cutting means opposite the cutting surface thereof and said second electrode means, and between the leading edge of said pressure cutting means and said second electrode means through tissue which is located therebetween, said current having sufficient amplitude to cause coagulation therein.
Claim 2
Dependent Claim
168 words
A surgical instrument for cutting and coagulating tissue, said surgical instrument comprising in combination: means for pressure cutting, said pressure cutting means serving as a first electrode and having a leading edge and a cutting surface, the leading edge of said means for pressure cutting forming the forward portion of the cutting surface; second electrode means set apart from and electrically insulated from said pressure cutting means on the side of said pressure cutting means opposite the cutting surface thereof; means for attaching said second electrode means to said pressure cutting means; and means for providing a voltage between said pressure cutting means and said second electrode means, whereby an electric current can be made to flow between a portion of the side of said pressure cutting means opposite the cutting surface thereof and said second electrode means, and between the leading edge of said pressure cutting means and said second electrode means through tissue which is located therebetween, said current having sufficient amplitude to cause coagulation therein.
Claim 3
Dependent Claim
30 words
The apparatus as described in claim 1, wherein said means for providing a voltage between said pressure cutting means and said second electrode means includes a source of radio-frequency voltage.
Claim 4
Dependent Claim
61 words
The apparatus as described in claim 2, wherein said second electrode means is located substantially near to the leading edge of said pressure cutting means, whereby coagulation of the tissue placed in contact with said pressure cutting means and said second electrode means can be made to occur substantially immediately after the tissue is acted upon by said pressure cutting means.
Claim 5
Dependent Claim
51 words
The apparatus as described in claim 3, wherein said means for attaching said second electrode means permits said second electrode means to be slidably attached to said pressure cutting means, whereby the position of said second electrode means can be adjusted relative to the leading edge of said pressure cutting means.
Claim 6
Independent Claim
33 words
The apparatus as described in claims 1 or 4, wherein said means for providing said voltage between a pressure cutting means and said second electrode means includes manually actuated current amplitude control means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |