Covered endoprosthesis and delivery system
AssigneeGore Enterprises Holdings, Inc.
InventorsMichael J. Vonesh, Joseph R. Armstrong, Edward H. Cully, Margaret L. Gallegos
Life of this patent
Estimating the term…
Abstract
The present invention is an improved endovascular device particularly useful for use in transjugular intrahepatic portosystemic shunt (TIPS) procedures. The device employs a two-part stent-graft construction that provides a low permeability membrane to line the shunt and an uncovered stent portion designed to reside in the portal vein. The device provides numerous benefits over previous stents and stent-grafts used in TIPS procedures, including being more compact to deliver, being easier to accurately deploy, a controlled compacted surface with tucked apices, an improved stent winding pattern, and being more flexible in delivery and use.
Claims18
An endoprosthesis comprising:
- self-expanding stent element having at least a first segment and a second segment;
- a cover on the first segment, with the second segment being left uncovered;
- the uncovered second segment including a stent pattern that prevents uncontrolled longitudinal elongation of the second segment of the stent;
- the cover including a structure having a transmural permeability time over a majority of the cover of greater than 60 seconds per 100 cc of air per 1 cm2 of cover at 1.2 kPa of pressure;
- wherein the stent pattern comprises a continuous wire wrapped across the second segment at least twice producing interlocked apices and at least one cross-over region;
- and
- wherein the wire includes two ends and the two ends are both terminated within the covered first segment.
An endoprosthesis comprising:
- a self-expanding stent element having at least a first segment and a second segment;
- a cover on the first segment, with the second segment being left uncovered;
- the uncovered second segment including a stent pattern that prevents uncontrolled longitudinal elongation of the second segment of the stent;
- wherein the stent pattern comprises a continuous wire wrapped across the second segment at least twice producing interlocked apices and at least one cross-over region;
- and
- wherein the wire includes two ends and the two ends are both terminated within the covered first segment.
An endoprosthesis comprising:
- a self-expanding stent element having at least a first segment and a second segment;
- a cover on the first segment, with the second segment being left uncovered;
- the uncovered second segment including a stent pattern that prevents uncontrolled longitudinal elongation of the second segment of the stent;
- the cover including a structure having a transmural permeability time over a majority of the cover of greater than 60 seconds per 100 cc of air per 1 cm2 of cover at 1.2 kPa of pressure;
- wherein the stent pattern of the second segment comprises a helical chain link pattern;
- and
- wherein the helical chain link pattern is formed from a single wire that is wrapped across the second segment in one longitudinal direction and then wrapped across the second segment again in an opposite longitudinal direction, the wire being interwoven with itself to form the chain link pattern.
Dependencies are inferred from the claim text.