Abluminal, Multilayer Coating Constructs for Drug-Delivery Stents
First Claim
1. A structural element of an implantable medical device, a surface of the structural element comprises an abluminal side, a luminal side, a first sidewall, and a second sidewall, the first and second sidewalls extending between the abluminal side and the luminal side, the first sidewall including a first sidewall portion adjacent to the abluminal side, wherein the structural element has a coating comprising:
- a continuous first layer disposed above all of the abluminal side and over the first sidewall portion as measured along an axis normal to the first sidewall portion, wherein the luminal side and other portions of the first sidewall are free from the first layer; and
a continuous second layer covering the first layer such that a portion of the first layer is not covered by the second layer, wherein the luminal side is free from the second layer.
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Abstract
Implantable medical devices may include at least one structural element having an abluminal side, luminal side, and sidewalls between the abluminal and luminal sides. The coating may include at least two continuous coating layers. In some embodiments, the luminal side, and all or a majority of the sidewalls are free of at least two of the coating layers.
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Citations
21 Claims
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1. A structural element of an implantable medical device, a surface of the structural element comprises an abluminal side, a luminal side, a first sidewall, and a second sidewall, the first and second sidewalls extending between the abluminal side and the luminal side, the first sidewall including a first sidewall portion adjacent to the abluminal side, wherein the structural element has a coating comprising:
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a continuous first layer disposed above all of the abluminal side and over the first sidewall portion as measured along an axis normal to the first sidewall portion, wherein the luminal side and other portions of the first sidewall are free from the first layer; and a continuous second layer covering the first layer such that a portion of the first layer is not covered by the second layer, wherein the luminal side is free from the second layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A structural element of an implantable medical device, a surface of the structural element comprises an abluminal side, a luminal side, a first curved surface, a second curved surface, a first sidewall, and a second sidewall, the first and second sidewalls extending between the abluminal side and the luminal side, the first curved surface extending from the first sidewall to the abluminal side, the second curved surface extending from the second sidewall to the abluminal side, wherein the structural element has a coating comprising:
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a continuous first layer disposed on a portion of abluminal side, the first layer having a first edge adjacent the first curved surface and a second edge adjacent the second curved surface, wherein the luminal side, the first curved surface, the first and second sidewalls, and other portions of the abluminal side are free from the first layer; and a continuous second layer covering the first layer from the first edge of the first layer to the second edge of the first layer, wherein the luminal side, the first curved surface, the first and second sidewalls are free from the second layer. - View Dependent Claims (19, 20, 21)
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Specification