Coating for implantable devices and a method of forming the same
First Claim
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1. A method of forming a coating for an implantable device, comprising:
- forming a primer layer comprising a polymer on at least a portion of a surface of an implantable device, wherein the primer layer has a weight measurement of X;
forming a reservoir layer comprising a polymer and an active ingredient on at least a selected portion of the primer layer, wherein the reservoir layer has a weight measurement of Y; and
wherein X/Y is equal to or greater than 0.25 and equal to or less than 20.
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Abstract
Coatings for implantable devices or endoluminal prosthesis, such as stents, are provided, including a method of forming the coatings. The coatings can be used for the delivery of an active ingredient or a combination of active ingredients.
302 Citations
32 Claims
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1. A method of forming a coating for an implantable device, comprising:
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forming a primer layer comprising a polymer on at least a portion of a surface of an implantable device, wherein the primer layer has a weight measurement of X;
forming a reservoir layer comprising a polymer and an active ingredient on at least a selected portion of the primer layer, wherein the reservoir layer has a weight measurement of Y; and
wherein X/Y is equal to or greater than 0.25 and equal to or less than 20. - View Dependent Claims (2, 3, 4, 5, 6, 7, 30, 31)
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8. A method of forming a coating for an implantable device, comprising:
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forming a primer layer comprising a polymer on at least a portion of a surface of an implantable device, wherein the primer layer has a thickness X;
forming a reservoir layer comprising a polymer and an active ingredient on at least a selected portion of the primer layer, wherein the reservoir layer has a thickness Y; and
wherein X/Y is equal to or greater than 0.25 and equal to or less than 20. - View Dependent Claims (9, 17, 18, 19, 20, 21, 22)
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10. An implantable device comprising a coating for delivery of an active ingredient, wherein the coating includes:
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a primer region comprising a polymer on at least a portion of a surface of an implantable device, wherein the primer region has a thickness X;
a reservoir region comprising a polymer and an active ingredient on at least a selected portion of the primer region, wherein the reservoir region has a thickness Y; and
wherein the thickness X is measured from the outer surface of the primer region to the surface of the implantable device prior to the migration of the active ingredient from the reservoir region to the primer region, and wherein X/Y is equal to or greater than 0.25 and equal to or less than 20. - View Dependent Claims (11, 12, 13, 14, 15, 23, 24, 25)
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- 16. A stent comprising a coating for delivery of an active ingredient, wherein the coating includes a primer region comprising a polymer and a reservoir region comprising a polymer and an active ingredient, and wherein the thickness or the weight of the primer region is sufficiently high so as to allow drug loading of 30% in the reservoir region without causing the coating to significantly crack when the stent is expanded.
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32. The method of claim wherein the device is a stent.
Specification