Endoluminal encapsulated stent and methods of manufacture and endoluminal delivery
First Claim
1. A radially expandable reinforced vascular graft comprising:
- at least one tubular radially expandable support member having a plurality of openings passing through walls of the support member, andan expanded polytetrafluoroethylene tubular member circumferentially surrounding and at least substantially enclosing the at least one tubular radially expandable support member and passing into and through the plurality of openings passing through the walls of the support member, the expanded polytetrafluoroethylene tubular member being radially expandable with the support member to an expanded diameter;
wherein the expanded polytetrafluoroethylene tubular member further comprises a node-fibril microstructure which undergoes nodal elongation during radial expansion to the expanded diameter.
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Accused Products
Abstract
An radially expandable stent-graft and method of making the same, including at least one a stent member encapsulated between at least two longitudinally expanded polytetrafluoroethylene (ePTFE) coverings. The at least one stent member has openings through wall surfaces of the stent to permit radial expansion. The at least two longitudinally expanded ePTFE coverings are circumferentially applied over the at least one stent member in their unsintered state, and sintered during application of a circumferential pressure to bond the ePTFE around and through the wall surfaces of the stent. The sintered ePTFE forms a substantially continuous, monolithic and integral encapsulation of the at least one stent. Upon radial expansion of the stent-graft, the stent and the ePTFE node-fibril microstructure radially deform. Radial deformation of the ePTFE encapsulation results in nodal elongation in the axis of radial expansion. After radial expansion of the stent-graft, a substantial bonded area remains intact and maintains the encapsulation of the stent in vivo.
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Citations
21 Claims
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1. A radially expandable reinforced vascular graft comprising:
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at least one tubular radially expandable support member having a plurality of openings passing through walls of the support member, and an expanded polytetrafluoroethylene tubular member circumferentially surrounding and at least substantially enclosing the at least one tubular radially expandable support member and passing into and through the plurality of openings passing through the walls of the support member, the expanded polytetrafluoroethylene tubular member being radially expandable with the support member to an expanded diameter;
wherein the expanded polytetrafluoroethylene tubular member further comprises a node-fibril microstructure which undergoes nodal elongation during radial expansion to the expanded diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A radially expandable reinforced vascular graft comprising:
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at least one radially expandable tubular support member having a plurality of openings passing through walls thereof; and at least one longitudinally expanded polytetrafluoroethylene tubular member circumferentially surrounding the at least one radially expandable tubular support member on luminal and abluminal surfaces thereof such that the at least one radially expandable tubular support member is interdisposed and circumferentially enclosed over at least a substantial longitudinal extent thereof;
the at least one longitudinally expanded polytetrafluoroethylene tubular member passing through the plurality of openings in the walls of the tubular support member and radially expandable substantially concurrently with the tubular support member to an expanded diameter;
wherein the at least one longitudinally expanded polytetrafluoroethylene tubular member further comprises a node-fibril microstructure which undergoes nodal elongation during radial expansion to the expanded diameter. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification