Expandable/retractable stent and methods thereof
First Claim
Patent Images
1. A retractable intraluminal medical device comprising:
- an elongate radially expandable tubular stent having an interior luminal portion and an opposite exterior portion extending along a longitudinal stent axis, the elongate radially expandable tubular stent having an expanded state and a retracted state, wherein the expandable tubular stent comprises a plurality of construction materials; and
a first of the plurality of construction materials being a shape-memory Nitinol, the shape-memory Nitinol having a preshape and a shape transition temperature, wherein the shape-memory Nitinol retracts to its preshape and causes the expandable tubular stent to collapse when said shape-memory Nitinol is heated to above the shape transition temperature at the retracted state, and wherein the shape transition temperature for the shape-memory Nitinol is preferably between 43°
C. and 90°
C.
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Accused Products
Abstract
A retractable intraluminal medical device for treating tissues in a patient, the device comprising an elongate radially expandable/retractable tubular stent having an interior luminal portion and an opposite exterior portion extending along a longitudinal stent axis; a first of the plurality construction materials being a shape-memory Nitinol, the shape-memory Nitinol having a preshape and a shape transition temperature, wherein the shape-memory Nitinol retracts to its preshape and causes the expandable tubular stent to collapse when the shape-memory Nitinol is heated to above the shape transition temperature at a retracted state.
252 Citations
18 Claims
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1. A retractable intraluminal medical device comprising:
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an elongate radially expandable tubular stent having an interior luminal portion and an opposite exterior portion extending along a longitudinal stent axis, the elongate radially expandable tubular stent having an expanded state and a retracted state, wherein the expandable tubular stent comprises a plurality of construction materials; and a first of the plurality of construction materials being a shape-memory Nitinol, the shape-memory Nitinol having a preshape and a shape transition temperature, wherein the shape-memory Nitinol retracts to its preshape and causes the expandable tubular stent to collapse when said shape-memory Nitinol is heated to above the shape transition temperature at the retracted state, and wherein the shape transition temperature for the shape-memory Nitinol is preferably between 43°
C. and 90°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for treating an intraluminal tissue of a patient, the method comprising the steps of:
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(a) positioning a retractable intraluminal medical device at an appropriate intraluminal tissue site, the retractable intraluminal medical device comprising an elongate radially expandable tubular stent having an interior luminal portion and an opposite exterior portion extending along a longitudinal stent axis, the elongate radially expandable tubular stent having an expanded state and a retracted state, wherein the expandable tubular stent comprises a plurality of construction materials; and
a first of the plurality of construction materials being a shape-memory Nitinol, the shape-memory Nitinol having a preshape and a shape transition temperature, wherein the shape-memory Nitinol retracts to its preshape and causes the expandable tubular stent to collapse when said shape-memory Nitinol is heated to above the shape transition temperature at the retracted state, and wherein the shape transition temperature for the shape-memory Nitinol is preferably between 43°
C. and 90°
C.;(b) deploying the radially expandable tubular stent. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A retractable intraluminal medical device comprising:
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an elongate radially expandable tubular stent having an interior luminal portion and an opposite exterior portion extending along a longitudinal stent axis, the elongate radially expandable tubular stent having an expanded state and a retracted state, wherein the expandable tubular stent comprises a first construction material and a second construction material; the first construction material being a shape-memory Nitinol, the shape-memory Nitinol having a preshape and a shape transition temperature, wherein the shape-memory Nitinol retracts to its preshape and causes the expandable tubular stent to collapse when said shape-memory Nitinol is heated to above the shape transition temperature at the retracted state, wherein the shape transition temperature for the shape-memory Nitinol is preferably between 43°
C. and 90°
C.; andthe first construction material making up the exterior portion of the expandable tubular stent and the second construction material making up the interior luminal portion, wherein the exterior portion and the interior luminal portion of the expandable tubular stent are secured together.
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Specification