US4635636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microspike surgical approximator
Assignee: Cornell Research Foundation Inc
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Filing: 1985-06-18
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Granted: 1987-01-13
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Expires: 2005-06-18
Abstract
Abstract A microspike surgical approximator usable to stabilize the ends of ducts or vessels being anastomosed microsurgically includes a pair of approximating clamps slidable along a bar which is foldable at a point intermediate the approximating clamps. Each clamp includes a stationary blade which is alidable along the bar and a pivoted blade that is movable with respect to the stationary blade. The major faces of the blades terminate in lower duct or vessel clamping portions, each of which has a curved jaw segment. These jaw segments cooperate to form an annular duct or vessel receiving aperture. A plurality of microspikes are secured to the curved jaw segments and extend into the duct or vessel receiving aperture. During vessel stabilization, the microspikes contact the adventitia of the vessel to hold the duct or vessel ends with minimal trauma.
Inventors
- 👤 Marc Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:58
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/11; A61B2017/1103; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44376; Y10T24/44385; Y10T24/44444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
348 words
A microspike surgical approximator usable to stabilize ends of a duct or vessel during microsurgical anastomosis of the duct or vessel, said microspike surgical approximator comprising: a generally rectangular elongated bar foldable intermediate its ends and having a fixed bar segment and a folding bar segment joined together by spaced hinge plates secured to said fixed bar segment and a pivot pin passing through said hinge plates and said folding bar segment; at least first and second approximating clamps slidably positioned on said bar with one of said clamps being slidably positioned on each of said fixed and folding bar segments, respectively; each said approximator clamp having a stationary blade which includes a generally rectangular aperture sized to receive one of said fixed and folding bar segments so that said stationary blade is slidably attached to said bar, and a pivoted blade pivotably attached to said stationary blade, said stationary blade and said pivoted blade of each said approximating clamp being spring biased; actuating means at first ends of said stationary and pivoted blades of each said approximating clamp, said actuating means being engageable by a user of said approximator to pivot said pivotable blade with respect to said stationary blade; duct or vessel clamping portions at second ends of said stationary and pivoted blades of each said approximating clamp, said duct or vessel clamping portions including curved jaw segments on each said stationary and pivoted blades, said curved jaw segments cooperating to form an annular duct or vessel receiving aperture; and a plurality of spaced microspikes on said curved jaw segments of each of said stationary and pivoted blades, said microspikes on said stationary blade being opposite to said microspikes on said pivoted blade, each of said microspikes extending inwardly into said annular duct or vessel receiving aperture, said microspikes being formed on stainless steel with each said microspike having a diameter and a length sized to penetrate only the adventitia of the duct or vessel during microsurgical anostomosis of the duct or vessel with no penetration of the mucosa or endothelium of the duct or vessel.
Claim 2
Dependent Claim
348 words
A microspike surgical approximator usable to stabilize ends of a duct or vessel during microsurgical anastomosis of the duct or vessel, said microspike surgical approximator comprising: a generally rectangular elongated bar foldable intermediate its ends and having a fixed bar segment and a folding bar segment joined together by spaced hinge plates secured to said fixed bar segment and a pivot pin passing through said hinge plates and said folding bar segment; at least first and second approximating clamps slidably positioned on said bar with one of said clamps being slidably positioned on each of said fixed and folding bar segments, respectively; each said approximator clamp having a stationary blade which includes a generally rectangular aperture sized to receive one of said fixed and folding bar segments so that said stationary blade is slidably attached to said bar, and a pivoted blade pivotably attached to said stationary blade, said stationary blade and said pivoted blade of each said approximating clamp being spring biased; actuating means at first ends of said stationary and pivoted blades of each said approximating clamp, said actuating means being engageable by a user of said approximator to pivot said pivotable blade with respect to said stationary blade; duct or vessel clamping portions at second ends of said stationary and pivoted blades of each said approximating clamp, said duct or vessel clamping portions including curved jaw segments on each said stationary and pivoted blades, said curved jaw segments cooperating to form an annular duct or vessel receiving aperture; and a plurality of spaced microspikes on said curved jaw segments of each of said stationary and pivoted blades, said microspikes on said stationary blade being opposite to said microspikes on said pivoted blade, each of said microspikes extending inwardly into said annular duct or vessel receiving aperture, said microspikes being formed on stainless steel with each said microspike having a diameter and a length sized to penetrate only the adventitia of the duct or vessel during microsurgical anostomosis of the duct or vessel with no penetration of the mucosa or endothelium of the duct or vessel.
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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) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |