Intravascular stent with increasing coating retaining capacity
First Claim
Patent Images
1. An expandable stent, comprising:
- a tubular structure including an outer surface positionable adjacent to a vessel wall, an inner surface facing a lumen of a body passageway, a plurality of expansion struts that are substantially parallel to each other, connector struts, and cells, the tubular structure having a first diameter that permits intraluminal delivery of the tubular structure into the body passageway, and a second expanded and deformed diameter upon the application from the interior of the tubular member of a radially, outwardly extending force; and
a plurality of cavities formed in the outer surface of the stent wherein the plurality of cavities are micro-holes or micro-slits that extend from the outer surface through the inner surface, and wherein the micro-holes or micro-slits are configured to provide a plurality of reservoirs for a substance; and
a substance contained in said reservoirs.
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Abstract
An expandable stent includes a tubular structure with an outer surface positionable adjacent to a vessel wall and an inner surface facing a lumen of a body passageway. The tubular structure further includes a plurality of expansion struts, connector struts and cells. The tubular structure has a first diameter which permits intraluminal delivery of the tubular structure into the body passageway, and a second expanded and deformed diameter which is achieved upon the application of a radially, outwardly extending force. A plurality of cavities are formed in the outer surface of the stent.
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Citations
21 Claims
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1. An expandable stent, comprising:
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a tubular structure including an outer surface positionable adjacent to a vessel wall, an inner surface facing a lumen of a body passageway, a plurality of expansion struts that are substantially parallel to each other, connector struts, and cells, the tubular structure having a first diameter that permits intraluminal delivery of the tubular structure into the body passageway, and a second expanded and deformed diameter upon the application from the interior of the tubular member of a radially, outwardly extending force; and
a plurality of cavities formed in the outer surface of the stent wherein the plurality of cavities are micro-holes or micro-slits that extend from the outer surface through the inner surface, and wherein the micro-holes or micro-slits are configured to provide a plurality of reservoirs for a substance; and
a substance contained in said reservoirs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An expandable stent, comprising:
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a tubular structure including an outer surface positionable adjacent to a vessel wall, an inner surface facing a lumen of a body passageway, a plurality of expansion struts that are substantially parallel to each other, connector struts, and cells, the tubular structure having a first diameter that permits intraluminal delivery of the tubular structure into the body passageway, and a second expanded and deformed diameter upon the application from the interior of the tubular member of a radially, outwardly extending force;
a plurality of cavities formed in the outer surface of the stent wherein the plurality of cavities are micro-holes or micro-slits that extend from the outer surface through the inner surface, and wherein the micro-holes or micro-slits are configured to provide a plurality of reservoirs for a substance; and
a substance disposed on at least a portion of outer surface of the stent including and extending into at least a portion of the cavities contained in said reservoirs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification