Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Heart valve – Having rigid or semirigid pivoting occluder
Patent
1995-10-12
1997-10-07
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Heart valve
Having rigid or semirigid pivoting occluder
A61F 224
Patent
active
056742800
ABSTRACT:
An annuloplasty ring of low elastic modulus Ti--Nb--Zr alloy to provide enhanced biocompatibility, hemocompatibility, flexibility and strength. Components of the annuloplasty ring can be surface hardened by oxygen or nitrogen diffusion or by depositing a tightly adherent, hard, wear-resistant, hemocompatible ceramic coating by physical vapor deposition and chemical vapor deposition. The Ti--Nb--Zr alloy can be used as a fabrication material for any annuloplasty ring component that either comes into contact with blood, thereby demanding high levels of hemocompatibility, or that is subject to microfretting, corrosion, or other wear such that a low elastic modulus metal with a corrosion-resistant, hardened surface would be desirable.
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Daigle Kenneth P.
Davidson James A.
Isabella David
Smith & Nephew Inc.
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