Medical apparatus with scratch-resistant coating and method of making same
First Claim
1. A method for providing a protective coating on a surface of a medical apparatus adapted for use within a patient, comprising:
- applying a coating solution to a surface of an implantable medical apparatus, such that a protective layer is formed upon the apparatus surface,wherein the coating solution comprises a matrix polymer which contains a reinforcing agent, the reinforcing agent having a higher surface hardness than the surface hardness of the medical apparatus, wherein a total coating thickness on the medical apparatus is no greater than about 3 mil (0.003 inch).
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Accused Products
Abstract
A method for providing a medical apparatus with a protective surface coating is described. The method comprises applying to a medical apparatus a coating solution that contains a matrix polymer such as a urethane, and a reinforcing agent such as lamellar platelet and fiber additives, as micaceous pigments, flake pigments, tungsten powder and glass fiber, to increase the resistance of the medical apparatus to injury, such that the surface coating forms a protective, scratch- and puncture-resistant layer on the medical apparatus. The particles or fibers of the reinforcing agent may be oriented to provide the medical apparatus with additional resistance to injury. The coating is well suited to provide balloon catheters, particularly PET balloons, and the like with the toughness desirable for use in stent delivery and placement.
339 Citations
19 Claims
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1. A method for providing a protective coating on a surface of a medical apparatus adapted for use within a patient, comprising:
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applying a coating solution to a surface of an implantable medical apparatus, such that a protective layer is formed upon the apparatus surface, wherein the coating solution comprises a matrix polymer which contains a reinforcing agent, the reinforcing agent having a higher surface hardness than the surface hardness of the medical apparatus, wherein a total coating thickness on the medical apparatus is no greater than about 3 mil (0.003 inch). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19)
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17. A method for providing a protective coating on the surface of an implantable medical apparatus adapted for use within a patient, comprising:
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applying a coating solution to a surface of the medical apparatus, the coating solution comprising a reinforcing agent, the reinforcing agent containing fibers, such that a protective coating is formed on the apparatus surface; and aligning the fibers on the surface of the medical apparatus in a direction parallel to the apparatus surface.
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18. A method for providing a protective coating on the surface of an implantable medical apparatus adapted for use within a patient, comprising:
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applying a coating solution to a surface of the medical apparatus, such that a protective layer is formed upon the apparatus surface, such that a total coating thickness on the medical apparatus is no greater than about 3 mil, wherein the coating solution comprises a matrix polymer which contains a reinforcing agent, the reinforcing agent containing particles having a higher surface hardness than the surface hardness of the medical apparatus; and aligning the particles on the surface of the medical apparatus in a direction parallel to the apparatus surface.
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Specification