US5104400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood vessel patch
Assignee: Bard Peripheral Vascular Inc
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Filing: 1991-08-28
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Granted: 1992-04-14
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Expires: 2011-08-28
Abstract
Abstract A vascular patch for closing an incision in a blood vessel includes a base layer of expanded polytetrafluoroethylene (PTFE) having an outer coating of an elastomeric, biocompatible material such as polyurethane to minimize suture hole bleeding. Suture guidelines are formed upon the ablumenal side of the PTFE base layer prior to application of the elastomeric coating to facilitate proper and consistent placement of sutures. A colorant is added to the elastomeric coating to identify the ablumenal side of the vascular patch. The vascular patch is made by mounting an expanded PTFE tube upon a mandrel and applying a water based PTFE ink as a helical stripe about the outer surface of the PTFE tube to form the suture guidelines. The striped PTFE tube is then dip-coated or spray-coated with the elastomeric coating to which the colorant has been added. The PTFE tube is slit to form a flat sheet from which vascular patches are cut.
Inventors
- 👤 Ramon Berguer
- 👤 Robert C. Farnan
- 👤 William M. Colone
- 👤 Rajagopal R. Kowligi
- 👤 Linda V. Della Corna
- 👤 Joseph B. Sinnott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:09
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/04; A61L31/048; A61B; A61B17/00; A61B17/0057; A61F; A61F2/00; A61F2/0063; A61F2/02; A61F2/04; A61F2/06; A61L27/00; A61L27/14; A61L27/16; A61L27/50; A61L27/507; A61L27/56; A61L31/08; A61L31/10; A61B17/068; A61B17/072; A61B17/07292; A61B2017/00526; A61F2/0077; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
96 words
A method of producing a vascular patch form an expanded porous PTFE tube having opposing inner and outer cylindrical walls, said method comprising the steps of: a. coating the outer cylindrical wall of the PTFE tube with a liquified elastomer without coating the inner cylindrical wall thereof, to form an elastomeric coating upon the outer cylindrical wall of the PTFE tube; b. drying the elastomeric coating; c. cutting the cylindrical wall of the PTFE tube along its length to provide a relatively flat sheet of material; and d. cutting a vascular patch form the flat sheet.
Claim 2
Independent Claim
96 words
A method of producing a vascular patch form an expanded porous PTFE tube having opposing inner and outer cylindrical walls, said method comprising the steps of: a. coating the outer cylindrical wall of the PTFE tube with a liquified elastomer without coating the inner cylindrical wall thereof, to form an elastomeric coating upon the outer cylindrical wall of the PTFE tube; b. drying the elastomeric coating; c. cutting the cylindrical wall of the PTFE tube along its length to provide a relatively flat sheet of material; and d. cutting a vascular patch form the flat sheet.
Claim 3
Dependent Claim
38 words
The method of producing a vascular patch as recited by claim 1 wherein said coating step includes the steps of mounting the PTFE tube upon a mandrel, and dipping the mandrel in a container of the liquified elastomer.
Claim 4
Dependent Claim
41 words
The method of producing a vascular patch as recited by claim 1 wherein said coating step includes the steps of mounting the PTFE tube upon a mandrel, and spraying the liquified elastomer upon the outer cylindrical wall of the PTFE tube.
Claim 5
Dependent Claim
37 words
The method of producing a vascular patch as recited by claim 1 wherein the liquified elastomer is selected from the group of elastomers consisting of consisting of medical-grade silicone rubber elastomers, segmented polyurethanes, polyurethane-ureas, and silicone-polyurethane copolymers.
Claim 6
Dependent Claim
46 words
The method of producing a vascular patch as recited by claim 1 further including the step of adding a colorant to the liquified elastomer prior to said coating step to add a color to the elastomeric coating, thereby identifying an ablumenal side of the vascular patch.
Claim 7
Dependent Claim
46 words
The method of producing a vascular patch as recited by claim 1 further including the step of marking indicia upon the outer cylindrical wall of the PTFE tube prior to said coating step to aid in the identification of an ablumenal side of the vascular patch.
Claim 8
Dependent Claim
76 words
The method of producing a vascular patch as recited by claim 6 wherein said marking step includes the step of applying stripes of PTFE ink upon the outer cylindrical wall of the PTFE tube prior to said coating step, said stripes running generally perpendicular to a central axis of the PTFE tube to form suture guidelines upon an ablumenal side of the vascular patch for aiding a surgeon in the proper and consistent placement of sutures.
Claim 9
Dependent Claim
65 words
The method of producing a vascular patch as recited by claim 7 wherein said stripe application step includes the step of rotating the mandrel while moving a PTFE ink pen linearly along the outer cylindrical wall of the PTFE tube generally parallel to the central axis of the PTFE tube to form a continuous helical stripe upon the outer cylindrical wall of the PTFE tube.
Claim 10
Independent Claim
109 words
A method of manufacturing a vascular patch form an expanded porous PTFE tube, the PTFE tube having a cylindrical wall with an outer surface, said method comprising the steps of: a. mounting an expanded PTFE tube on a cylindrical mandrel; b. coating the outer surface of the cylindrical wall of the PTFE tube with a liquified elastomer to form an elastomeric coating thereon; c. drying the elastomeric coating; d. cutting the cylindrical wall of the PTFE tube along the length of the PTFE tube; e. laying the cut PTFE tube relatively flat to form a generally planar sheet; and f. cutting the vascular patch from the generally planar sheet.
Claim 11
Independent Claim
109 words
A method of manufacturing a vascular patch form an expanded porous PTFE tube, the PTFE tube having a cylindrical wall with an outer surface, said method comprising the steps of: a. mounting an expanded PTFE tube on a cylindrical mandrel; b. coating the outer surface of the cylindrical wall of the PTFE tube with a liquified elastomer to form an elastomeric coating thereon; c. drying the elastomeric coating; d. cutting the cylindrical wall of the PTFE tube along the length of the PTFE tube; e. laying the cut PTFE tube relatively flat to form a generally planar sheet; and f. cutting the vascular patch from the generally planar sheet.
Claim 12
Dependent Claim
41 words
The method recited by claim 9 further including the step of adding a colorant to the liquified elastomer prior to said coating step for adding a color to the elastomeric coating and thereby identifying an ablumenal side of the vascular patch.
Claim 13
Dependent Claim
29 words
The method recited by claim 9 wherein the liquified elastomer is selected from the group of elastomers consisting of medical-grade silicone rubber elastomers, segmented polyurethanes, polyurethane-ureas, and silicone-polyurethane copolymers.
Claim 14
Dependent Claim
24 words
The method recited by claim 9 wherein said coating step includes the step of dipping the mandrel into a container of the liquified elastomer.
Claim 15
Dependent Claim
34 words
The method recited by claim 9 wherein said coating step includes the steps of rotating the mandrel while spraying the liquified elastomer upon the outer surface of the cylindrical wall of the PTFE tube.
Claim 16
Dependent Claim
84 words
The method recited by claim 9 including the step of applying stripes of PTFE ink upon the outer surface of the cylindrical wall of the PTFE tube prior to said coating step, said stripes running generally perpendicular to the central axis of the PTFE tube to form suture guidelines upon an ablumenal side of the vascular patch, the suture guidelines aiding a surgeon in the proper and consistent placement of sutures and aiding in the identification of the ablumenal side of the vascular patch.
Claim 17
Dependent Claim
58 words
The method recited by claim 14 wherein said stripe application step includes the step of rotating the mandrel while moving a PTFE ink pen linearly along the outer surface of the cylindrical wall of the PTFE tube generally parallel to the central axis of the PTFE tube to form a continuous helical stripe upon the outer surface thereof.
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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) | 1995-04-14 | 1995-10-14 | 1996-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-14 | 1999-10-14 | 2000-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-14 | 2003-10-14 | 2004-04-14 | $7700.00 | Window Closed / Lapsed |