Ventricular assist devices of enhanced hemocompatibility
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United States of America Patent
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Oct 14, 1997
Grant Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Dec 21, 1989
priority date (Note) -
Expired
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Abstract
Ventricular assist devices fabricated from low-modulus Ti--Nb--Zr alloys to provide enhanced biocompatibility and hemocompatibility. The ventricular assist devices may be surface hardened by oxygen or nitrogen diffusion or by coating with a tightly adherent, hard, wear-resistant, hemocompatible ceramic coating. It is contemplated that the Ti--Nb--Zr alloy can be substituted as a fabrication material for any portion of a ventricular assist device that either comes into contact with blood thereby demanding high levels of hemocompatibility, or that is subject to microfretting, corrosion, or other wear and so that a low modulus metal with a corrosion-resistant, hardened surface would be desirable.
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