US5011489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endothelium stripper and method of using the same
Assignee: University of South Florida St. Petersburg
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Filing: 1989-10-05
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Granted: 1991-04-30
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Expires: 2009-10-05
Abstract
Abstract A surgical tool for stripping the endothelium from varicose veins. A smooth probe member surmounts an elongate flexible wire and is inserted into the vein and withdrawn therefrom as a preparatory step. The smooth probe member is then removed from the wire member, and a smooth head member of frusto conical configuration is then mounted to the distal end of the wire. A plurality of barbed head members are then secured to the smooth head member, in longitudinal alignment with one another, distal to the smooth head member. The head members can be rigidly or flexibly interconnected to one another. The barbs on the barbed head members are swept back to facilitate their insertion into the vein and such barb members engage and strip the endothelium when the head members are withdrawn from the vein. The smooth head member is the leading head member during such withdrawal.
Inventors
- 👤 Mohamed E. M. Salem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:54
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/00008; A61B17/32; A61B17/3205; A61B17/3207; A61B2017/320741
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
114 words
A surgical tool for removing the endothelium of a vein, comprising: an elongate, flexible wire member having a proximal end and a distal end; a head member, of frusto conical configuration, disposed at and fixedly secured to the distal end of said wire member; and a distal end of said head member having a diameter greater than the diameter of a proximal end thereof; a plurality of barb members formed on an outer surface of said head member; said barb members being swept back at a predetermined angle to facilitate insertion of the head member into a vein; whereby retraction of said wire member and said head member strips the endothelium from said vein.
Claim 2
Dependent Claim
114 words
A surgical tool for removing the endothelium of a vein, comprising: an elongate, flexible wire member having a proximal end and a distal end; a head member, of frusto conical configuration, disposed at and fixedly secured to the distal end of said wire member; and a distal end of said head member having a diameter greater than the diameter of a proximal end thereof; a plurality of barb members formed on an outer surface of said head member; said barb members being swept back at a predetermined angle to facilitate insertion of the head member into a vein; whereby retraction of said wire member and said head member strips the endothelium from said vein.
Claim 3
Dependent Claim
33 words
The tool of claim 1, wherein the diameter of the distal end of said head member is about 11 mm. and wherein the diameter of the proximal end thereof is about 8 mm.
Claim 4
Dependent Claim
19 words
The tool of claim 1, wherein said barb members are swept back at an angle of about fifteen degrees.
Claim 5
Dependent Claim
18 words
The tool of claim 1, further comprising an internally threaded axial bore means formed in said head member.
Claim 6
Dependent Claim
21 words
The tool member of claim 1, further comprising a handle member fixedly secured to a proximal end of said wire member.
Claim 7
Dependent Claim
15 words
The tool of claim 1, wherein said barb members are about one-half mm in length.
Claim 8
Dependent Claim
116 words
A surgical tool, comprising: an elongate, flexible wire member having a leading end and a trailing end; a plurality of longitudinally spaced head members, each of which has a frusto conical configuration, being positioned at the leading end of said wire member; a leading end of each of said plurality of head members having a diameter greater than its trailing end; at least one of said head members having a plurality of barb members formed on an outer surface thereof; at least one of said head members having a smooth outer surface; and said at least one head member having a smooth outer surface being disposed at a trailing end of said plurality of head members.
Claim 9
Dependent Claim
116 words
A surgical tool, comprising: an elongate, flexible wire member having a leading end and a trailing end; a plurality of longitudinally spaced head members, each of which has a frusto conical configuration, being positioned at the leading end of said wire member; a leading end of each of said plurality of head members having a diameter greater than its trailing end; at least one of said head members having a plurality of barb members formed on an outer surface thereof; at least one of said head members having a smooth outer surface; and said at least one head member having a smooth outer surface being disposed at a trailing end of said plurality of head members.
Claim 10
Dependent Claim
34 words
The tool of claim 7, wherein the diameter of the leading end of each head member is greater than the diameter of the leading end of a head member disposed in trailing relation thereto.
Claim 11
Dependent Claim
34 words
The tool of claim 8, wherein the diameter of the trailing end of each head member is greater than the diameter of the trailing end of a head member disposed in trailing relation thereto.
Claim 12
Dependent Claim
35 words
The tool of claim 9, wherein said plurality of head members includes five head members, four of which have barbs formed on their respective outer surfaces and one of which has a smooth outer surface.
Claim 13
Dependent Claim
35 words
The tool of claim 10, wherein the barbs formed on the outer surface of the barbed head members are swept back in a leading-to-trailing direction to facilitate insertion of the head members into a vein.
Claim 14
Dependent Claim
17 words
The tool of claim 11, wherein said barbs have a substantially uniform extent of about one-half mm.
Claim 15
Independent Claim
166 words
A method of stripping the endothelium from a vein, comprising the steps of: slidably inserting a head member of frusto conical configuration having swept back barb members formed on an outer surface thereof into said vein; slidably inserting a smooth, barbless head member of frusto conical configuration into said vein subsequent to insertion of said barbed head member; inserting the barbed and barbless head members into said vein with their respective larger diameter ends preceding their respective smaller diameter ends so that said larger diameter ends follow the smaller diameter ends thereof during withdrawal of said barbed and barbless head members from the vein; retracting said barbless head member and said barbed head member from said vein; whereby said barb members do not engage the inner lining of the vein during their insertion thereinto due to the swept back orientation of said barb members; and whereby said barb members engage and strip the inner lining from said vein when said barbed head member is withdrawn therefrom.
Claim 16
Independent Claim
166 words
A method of stripping the endothelium from a vein, comprising the steps of: slidably inserting a head member of frusto conical configuration having swept back barb members formed on an outer surface thereof into said vein; slidably inserting a smooth, barbless head member of frusto conical configuration into said vein subsequent to insertion of said barbed head member; inserting the barbed and barbless head members into said vein with their respective larger diameter ends preceding their respective smaller diameter ends so that said larger diameter ends follow the smaller diameter ends thereof during withdrawal of said barbed and barbless head members from the vein; retracting said barbless head member and said barbed head member from said vein; whereby said barb members do not engage the inner lining of the vein during their insertion thereinto due to the swept back orientation of said barb members; and whereby said barb members engage and strip the inner lining from said vein when said barbed head member is withdrawn therefrom.
Claim 17
Dependent Claim
43 words
The method of claim 13, further comprising the step of interconnecting a plurality of barbed head members to one another and slidably inserting all of said interconnected barbed head members into said vein prior to the step of inserting said barbless head member.
Claim 18
Dependent Claim
23 words
The method of claim 14, further comprising the step of rigidly interconnecting said plurality of barbed and barbless head members to one another.
Claim 19
Dependent Claim
23 words
The method of claim 14, further comprising the step of flexibly interconnecting said plurality of barbed and barbless head members to one another.
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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) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |