US4815465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dissector device
Assignee: Individual
•
Filing: 1988-03-14
•
Granted: 1989-03-28
•
Expires: 2008-03-14
Abstract
Abstract A dissector device to be incorporated into the anvil-jaw of a ligation and division stapler to facilitate its use. Such device is inserted with ease through a relatively small opening in the neighboring tissues of the blood vessels to be ligated and divided. By using the dissector device the surgical operation is easier, faster and safer than when using the prior art ligation and division stapler.
Inventors
- 👤 Alfredo Alvarado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:41
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/128; A61B17/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A surgical stapling instrument having an anvil-jaw at a distal end of the instrument, comprising means for ligation and division of blood vessels and means for dissecting the tissues around the vessels, said dissecting means disposed at the distal end of the instrument, said dissecting means including an upstanding substantially pyramid-shaped dissector device intimately connected to and framing part of the anvil-jaw, and, said pyramid-shaped dissector having a base which is substantially quadrilateral and a vertex of the pyramid facing away from said anvil-jaw.
Claim 2
Dependent Claim
84 words
A surgical stapling instrument having an anvil-jaw at a distal end of the instrument, comprising means for ligation and division of blood vessels and means for dissecting the tissues around the vessels, said dissecting means disposed at the distal end of the instrument, said dissecting means including an upstanding substantially pyramid-shaped dissector device intimately connected to and framing part of the anvil-jaw, and, said pyramid-shaped dissector having a base which is substantially quadrilateral and a vertex of the pyramid facing away from said anvil-jaw.
Claim 3
Dependent Claim
15 words
Surgical instrument according to claim 1, wherein said vertex is slightly truncated and slightly rounded.
Claim 4
Dependent Claim
14 words
Surgical instrument according to claim 1 wherein said dissector device is made of metal.
Claim 5
Dependent Claim
12 words
Surgical instrument according to claim 3, wherein said metal is surgical steel.
Claim 6
Dependent Claim
47 words
Surgical instrument according to claim 3, wherein said ligation and division means include: two pushers for ligation of said vessels and a dividing knife disposed between said pushers for dividing the vessels, and squeezing handles disposed at the proximal end of the instrument for activatig the instrument.
References Cited (Backward Citations)
US3584628A
Cited
US3735762A
Cited
US3653117A
Cited
US4058126A
Cited
US4368734A
Cited
US4595007A
Cited
US4596249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |