US3837345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venous valve snipper
Assignee: Individual
•
Filing: 1973-08-31
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Granted: 1974-09-24
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Expires: 1993-08-31
Abstract
Abstract A cylindrical catheter-type instrument has a tubular member slidable lengthwise relative to a distal head member. The instrument may be inserted in the distal end of a vein in closed position causing it to pass through the venous valves in the direction of normal blood flow. When the instrument is partially withdrawn in open position the venous valve leaflets protrude into a gap between the tubular and head members and become impaled on spikes in the head member. Then the tubular member is closed on the head member causing an annular cutting blade on the tubular member to snip off the valve leaflets. Opening and closing of the head and tubular members is accomplished by a scissors-type handle connected to the two parts.
Inventors
- 👤 A Matar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/32053; A61B17/320016; A61B17/22; A61B2017/22097; A61B2017/320064
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A venous valve snipper catheter instrument comprising a tubular member having a distal end and a proximal end, an annular cutting blade on said distal end, a rounded head mounted on a core rod extending through said tubular member, means for sliding said tubular member on said core rod to reciprocate said cutting blade toward and away from said head, said blade having an open position leaving a gap between the blade and head to receive the valve leaflets in a vein when the instrument is inserted and manipulated in the vein, and spikes in said head extending in a proximal direction beyond the head and partially across said gap when the blade is in said open position to impale said valve leaflets by manipulation of the instrument in the vein, said valve leaflets being excised by closing said cutting blade against said head.
Claim 2
Dependent Claim
144 words
A venous valve snipper catheter instrument comprising a tubular member having a distal end and a proximal end, an annular cutting blade on said distal end, a rounded head mounted on a core rod extending through said tubular member, means for sliding said tubular member on said core rod to reciprocate said cutting blade toward and away from said head, said blade having an open position leaving a gap between the blade and head to receive the valve leaflets in a vein when the instrument is inserted and manipulated in the vein, and spikes in said head extending in a proximal direction beyond the head and partially across said gap when the blade is in said open position to impale said valve leaflets by manipulation of the instrument in the vein, said valve leaflets being excised by closing said cutting blade against said head.
Claim 3
Dependent Claim
20 words
An instrument as defined in claim 1, said head being hollow to contain said excised valve leaflets on said spikes.
Claim 4
Dependent Claim
15 words
An instrument as defined in claim 1, said tubular member and core rod being flexible.
Claim 5
Dependent Claim
15 words
An instrument as defined in claim 1, said spikes being mounted on said core rod.
Claim 6
Dependent Claim
19 words
An instrument as defined in claim 1 including a rigid collar on said proximal end of said tubular member.
Claim 7
Dependent Claim
51 words
An instrument as defined in claim 5, said means for sliding said tubular member on said core rod comprising a handle having a pair of pivotal levers, means for detachably connecting one of said levers with said rigid collar, and means for detachably connecting the other lever with said core rod.
Claim 8
Dependent Claim
72 words
An instrument as defined in claim 1, said tubular member and core rod being flexible, a rigid collar on said proximal end of said tubular member, said means for sliding said tubular member on said core rod comprising a handle having a pair of pivotal levers, a clamp on one of said levers for clamping said rigid collar, and a nut on the other lever having threaded engagement with said core rod.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |