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Ventricular assist devices of enhanced hemocompatibility

  • US 5,676,632 A
  • Filed: 06/06/1995
  • Issued: 10/14/1997
  • Est. Priority Date: 12/21/1989
  • Status: Expired due to Fees
First Claim
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1. In a ventricular assist device for implantation in living body tissue of a patient of the type comprising:

  • (a) a pump to increase the pumping pressure of a left ventricle of a patient'"'"'s heart; and

    (b) a solenoid energy converter to provide energy to the pump;

    said pump and solenoid energy converter having surfaces that are exposed to body tissue and body fluid when the ventricular assist device is in use,the improvement wherein at least a portion of the ventricular assist device isfabricated from a metal alloy with enhanced hemocompatibility, said alloy comprising;

    (i) titanium; and

    (ii) from about 10 to about 20 wt. % niobium or from about 35 to about 50 wt % niobium;

    wherein the alloy is free of deliberately added toxic elements.

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