US5207686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical snare
Assignee: Individual
•
Filing: 1992-04-15
•
Granted: 1993-05-04
•
Expires: 2012-04-15
Abstract
Abstract The wire loop of a surgical snare is constructed so as to include a weakened or frangible region. When it is desired to open the loop so as to move it from its entrapped position on a polyp, an additional force is exerted on the loop to draw it further into the sheath. This causes the frangible region to break, thereby opening the loop and permitting the wire to slide free of the polyp. In accordance with an alternate embodiment, the wire loop is constructed so as to fold back on itself, with the folded back end being captured by a retaining element inside the sheath. When the loop becomes entrapped on a polyp, it is extended out of the sheath somewhat further than during normal use, at which point the captured end of the loop is released, opening the loop and permitting its removal from within the patient.
Inventors
- 👤 Stuart Dolgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/32056
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
172 words
In a surgical snare of the type including a sheath and a wire assembly slidably mounted within the sheath, the wire assembly being moved within the sheath as a result of its being manipulated by a user at a near end thereof, the wire assembly being formed into a loop at a distal end thereof, the improvement comprising means responsive to the manipulation of the near end by the user for causing said loop to become discontinuous, whereby the snare may be removed from a patient when the loop becomes caught on a polyp, said wire loop being formed by doubling an end of the wire back on itself, said means for causing said loop to become discontinuous comprising releasable connecting means for providing an electrical and mechanical connection between said wire loop end and another portion of said wire assembly, including means for releasing said connection in response to said wire assembly being manipulated to slide within said sheath so as to expand out of said sheath beyond a predetermined distance.
Claim 2
Dependent Claim
172 words
In a surgical snare of the type including a sheath and a wire assembly slidably mounted within the sheath, the wire assembly being moved within the sheath as a result of its being manipulated by a user at a near end thereof, the wire assembly being formed into a loop at a distal end thereof, the improvement comprising means responsive to the manipulation of the near end by the user for causing said loop to become discontinuous, whereby the snare may be removed from a patient when the loop becomes caught on a polyp, said wire loop being formed by doubling an end of the wire back on itself, said means for causing said loop to become discontinuous comprising releasable connecting means for providing an electrical and mechanical connection between said wire loop end and another portion of said wire assembly, including means for releasing said connection in response to said wire assembly being manipulated to slide within said sheath so as to expand out of said sheath beyond a predetermined distance.
Claim 3
Dependent Claim
44 words
The surgical snare of claim 1 further comprising means for producing resistance to relative sliding movement between said wire assembly and said sheath when said wire loop approaches said predetermined distance, whereby a user is provided an indication of impending release of said loop.
References Cited (Backward Citations)
US2054149A
Cited
US3791387A
Cited
US3805791A
Cited
US3828790A
Cited
US3949756A
Cited
US4010756B1
Cited
US4010756A
Cited
US4202338A
Cited
US4326530A
Cited
US4718419A
Cited
US4905691A
Cited
US5084054A
Cited
US5123906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |