Absorbable stent
First Claim
1. A stent comprising:
- a main body portion having a first open end and a second open end and a lumen extending therethrough, said main body portion being sized for intraluminal placement within a body passage, said main body portion comprising a sheet of material which has first and second free longitudinal edges and which has been rolled into a substantially cylindrical configuration, said material having at least one of holes and pores defined therethrough for tissue ingrowth;
said main body portion being expandable from a first, reduced diameter wherein said free edges at least partially overlap which allows intraluminal transport to a targeted portion of said body passage, to a second expanded diameter at said targeted portion so as to engage and support the interior wall of the body passage in which it is disposed against collapse and stenosis.
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Accused Products
Abstract
An absorbable stent for placement at the locus of a stenotic lesion which is flexible and compliance for safe and effective delivery to the cite of a coronary obstruction, for example, and so as to avoid arterial rupture or aneurysm formation while under continuous stress of a beating heart. The stent is expandable from a reduced diameter configuration, which facilitates delivery to the cite of a targeted arterial obstruction, to an expanded configuration when disposed within the targeted area. The stent can be carried to the cite to be treated and expanded to its supporting diameter on any suitable expandable catheter such as a mechanically expandable catheter or a catheter having an inflatable balloon. The stent is formed so as to have a wall with pores and/or holes to facilitate tissue ingrowth and encapsulation of the stent. The stent will subsequently be bioabsorbed to minimize the likelihood of embolization of the dissolved material.
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Citations
15 Claims
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1. A stent comprising:
a main body portion having a first open end and a second open end and a lumen extending therethrough, said main body portion being sized for intraluminal placement within a body passage, said main body portion comprising a sheet of material which has first and second free longitudinal edges and which has been rolled into a substantially cylindrical configuration, said material having at least one of holes and pores defined therethrough for tissue ingrowth;
said main body portion being expandable from a first, reduced diameter wherein said free edges at least partially overlap which allows intraluminal transport to a targeted portion of said body passage, to a second expanded diameter at said targeted portion so as to engage and support the interior wall of the body passage in which it is disposed against collapse and stenosis.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of preventing occlusion and stenosis of a body passage comprising:
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providing a catheter assembly having an expandable distal end portion; mounting an expandable stent on said expandable distal end portion of said catheter assembly, said stent including a main body portion having a first open end and a second open end and a lumen extending therethrough, said main body portion being sized for intraluminal placement within a targeted portion of a body passage, said main body portion comprising a sheet of material which has first and second free longitudinal edges and which has been rolled into a substantially cylindrical configuration, said material having at least one of holes and pores defined therethrough for tissue ingrowth;
said main body portion being expandable from a first reduced diameter wherein said free edges at least partially overlap and which allows transluminal transport to a stenotic portion of a targeted portion of a body passage, to a second expanded diameter at said targeted portion to engage and support the interior wall of the body passage in which it is disposed against collapse and stenosis;inserting said catheter assembly distal end into a body passage; guiding said distal end to a targeted portion of the body passage; and expanding said expandable portion to expand said stent so as to engage, expand, and support the interior walls of the targeted portion of the body passage. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification