Expandable Stent with Constrained End
AssigneeC.R. Bard, Inc.
InventorMathew Dixon
Life of this patent
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Abstract
A stent graft having a tubular stent frame including a plurality of connected struts that form a wall extending along a longitudinal axis from a first end to a second end is described. The stent frame may have a substantially uniform expanded diameter from the first end to the second end, a first expanded polytetrafluoroethylene (ePTFE) covering positioned over an abluminal surface of the tubular stent frame, and a second ePTFE covering positioned over a luminal surface of the tubular stent frame. The second ePTFE covering may be joined to the first ePTFE covering through the tubular stent frame wall at the expanded diameter to form an encapsulated stent. The encapsulated stent may have a reduced diameter section at a first end of the encapsulated stent that is less than the expanded diameter.
Claims20
A stent graft comprising:
- a cylindrical wall;
- a first tube disposed coaxially outside of the wall;
- and
- a second tube disposed coaxially inside of the wall connected to the first tube through or around the wall at one or more locations,
- wherein at least one end region of the stent graft exhibits a diameter smaller than a diameter of a middle region of the stent graft.
A method for making a stent graft comprising:
- making an assembly by
- providing a stent having a first diameter;
- placing a first tube coaxially outside of the stent;
- placing a second tube coaxially inside of the stent;
- and
- connecting the first tube to the second tube through or around the stent at one or more locations;
- placing the assembly on a mandrel having a first end diameter smaller than and a middle region diameter larger than the first diameter;
- and
- conforming the assembly shape to the mandrel shape
A method for making a stent graft comprising:
- making an assembly by
- providing a stent having a first diameter;
- placing a first tube coaxially outside of the stent;
- placing a second tube coaxially inside of the stent;
- and
- connecting the first tube to the second tube through or around the stent at one or more locations;
- positioning the assembly over an expansion element having a first end diameter smaller than and a middle region diameter larger than the first diameter;
- placing the expansion element and the assembly in a capture tube having a reduced diameter at one end;
- and
- conforming the assembly to the expanded expansion element.
Dependencies are inferred from the claim text.