Zirconium oxide and zirconium nitride coated catheters
First Claim
1. A catheter comprising:
- an elongate body and a bore extending through the body for insertion of surgical instruments, the body comprising;
(a) an underlying substrate of low elastic modulus metal composition, the substrate having surfaces; and
(b) a corrosion-resistant, biocompatible, hemocompatible, durable, stable coating selected from the group consisting of zirconium oxides, ranging in color from blue to black, and zirconium nitrides, ranging in color from yellow to orange;
said coating disposed on the surfaces of the substrate.
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Abstract
Catheters fabricated from a core or substrate of a low modulus metal coated with blue to black zirconium oxide or zirconium nitride. The coating provides enhanced thrombogenicity, biocompatibility, blood compatibility, corrosion-resistance, friction and microfretting resistance, durability, and electrical insulation, where applicable. The coatings may be applied to low modulus metallic substrates by physical or chemical vapor deposition as well as other ion-beam assisted methods. Preferably, however, for optimizing attachment strength, the catheters are fabricated from zirconium or zirconium-containing alloys and the coatings are formed by oxidizing or nitriding through an in situ method that develops a coating from and on the metal surface of the catheter, without need for depositing a coating on the metal surface.
154 Citations
13 Claims
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1. A catheter comprising:
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an elongate body and a bore extending through the body for insertion of surgical instruments, the body comprising; (a) an underlying substrate of low elastic modulus metal composition, the substrate having surfaces; and (b) a corrosion-resistant, biocompatible, hemocompatible, durable, stable coating selected from the group consisting of zirconium oxides, ranging in color from blue to black, and zirconium nitrides, ranging in color from yellow to orange;
said coating disposed on the surfaces of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification