Structured drug-eluting balloon catheter
First Claim
1. A balloon catheter featuring at least on portions of an outward-turned surface of a dilatable area thereof hair-like extensions, with an average diameter D, an average length L, and an average center- to-center distance P of the hair-like extensions to each other being selected such that a defined amount of a given drug on the balloon surface covered with hair-like extensions is secured through capillary forces to surfaces of the hair like extensions, and wherein P is at least twice as large as D.
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Accused Products
Abstract
The invention relates to a balloon catheter featuring—at least on portions of the outward-turned surface of the dilatable area—hair-like extensions, with the average diameter D, the average length L, and the average center-to-center distance P of the hair-like extensions to each other being selected such that a drug on the balloon surface covered with hair-like extensions can essentially be secured by means of capillary forces.
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Citations
20 Claims
- 1. A balloon catheter featuring at least on portions of an outward-turned surface of a dilatable area thereof hair-like extensions, with an average diameter D, an average length L, and an average center- to-center distance P of the hair-like extensions to each other being selected such that a defined amount of a given drug on the balloon surface covered with hair-like extensions is secured through capillary forces to surfaces of the hair like extensions, and wherein P is at least twice as large as D.
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13. A balloon catheter for use in angioplasty, in percutaneous transluminal angioplasty, or percutaneous transluminal coronary angioplasty, comprising:
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a dilatable area having an outward turned surface, a plurality of cylindrical extensions on the outward turned surface having an average diameter D between about 0.1 to 5 μ
m, an average length L between about 0.1 to about 5 μ
m, and an average center-to-center distance P between about 0.1 to about 7 μ
m, the D and L dimensions selected to result in a D to L ratio of between about 0.5 to about 2 and a P to D ratio of between about 1.5 to about 50, each of the extensions having a substantially flat top end that is distal from the outward turned surface;a coating having a thickness of less than about 100 nm on the extensions and comprising a polymer having catechol side groups; and
, a defined amount of a given cytostatic agent drug secured to at least a portion of surfaces of the extensions through capillary forces, wherein the defined amount is set by selection of values of D, L, and P.
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Specification