US5607478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn wrapped PTFE tubular prosthesis
Assignee: Boston Scientific Scimed Inc
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Filing: 1996-03-14
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Granted: 1997-03-04
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Expires: 2016-03-14
Abstract
Abstract An implantable microporous ePTFE tubular vascular graft exhibits long-term patency, superior radial tensile strength, reduction in tear propagation, and increases in suture retention strength and crush resistance. The graft includes an ePTFE tubular structure having a preselected microporous structure. The tubular structure is wrapped externally with a PTFE yarn in a helical fashion. The helical wrap of yarn is bonded to the exterior surface of the tubular structure by application of heat or heat in combination with force to form a composite structure which substantially maintains the porosity of the underlying tubular structure while increasing the suture retention strength, radial tensile strength, crush resistance, and tear propagation resistance.
Inventors
- 👤 David J. Lentz
- 👤 Nick Popadiuk
- 👤 Peter Schmitt
- 👤 Edward J. Dormier
- 👤 Richard J. Zdrahala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/86; A61F2/88; A61L; A61L27/00; A61L27/14; A61L27/16; A61L27/50; A61L27/507; A61F2002/072; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
An implantable tubular prosthesis comprising an expanded polytetrafluoroethylene (ePTFE) tube having a microporous structure defined by nodes interconnected by fibrils, said tube having a length; and at least one winding of a non-porous, non-elastic multifilament yarn helically wrapped externally about at least a portion of said tube along the length thereof, said yarn consisting essentially of polytetrafluoroethylene (PTFE).
Claim 2
Dependent Claim
58 words
An implantable tubular prosthesis comprising an expanded polytetrafluoroethylene (ePTFE) tube having a microporous structure defined by nodes interconnected by fibrils, said tube having a length; and at least one winding of a non-porous, non-elastic multifilament yarn helically wrapped externally about at least a portion of said tube along the length thereof, said yarn consisting essentially of polytetrafluoroethylene (PTFE).
Claim 3
Dependent Claim
27 words
An implantable tubular prosthesis of claim 1 wherein said multifilament PTFE yarn is flattened so that plural filaments of said yarn are in contact with said tube.
Claim 4
Dependent Claim
15 words
An implantable tubular prosthesis of claim 1 wherein said yarn is bonded to said tube.
Claim 5
Dependent Claim
17 words
An implantable tubular prosthesis of claim 3 wherein said yarn is bonded to said tube with heat.
Claim 6
Dependent Claim
19 words
An implantable tubular prosthesis of claim 3 wherein said yarn is bonded to said tube with heat and force.
Claim 7
Dependent Claim
23 words
An implantable tubular prosthesis of claim 1 wherein said at least one winding of said multifilament yarn are helically wrapped about said tube.
Claim 8
Dependent Claim
40 words
An implantable tubular prosthesis of claim 6 wherein said winding comprising at least two windings are wrapped about said tube in opposite helical directions and wherein the winding of one said yarn overlaps the winding of the other said yarn.
Claim 9
Dependent Claim
21 words
An implantable tubular prosthesis of claim 1 wherein each of said windings of said yarn are spaced apart a uniform distance.
Claim 10
Dependent Claim
19 words
An implantable tubular prosthesis of claim 8 wherein said uniform distance is between about 0.5 mm and 5 mm.
Claim 11
Dependent Claim
15 words
An implantable tubular prosthesis of claim 8 wherein said uniform distance is about 1.2 mm.
Claim 12
Dependent Claim
17 words
An implantable tubular prosthesis of claim 1 wherein said multifilament yarn is between 200 and 1500 denier.
Claim 13
Dependent Claim
14 words
An implantable tubular prosthesis of claim 1 wherein said multifilament yarn is 225 denier.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
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