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Development of Calcification Resistant Valve Prosthesis

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: 1 R43 HL55008-01,
Agency Tracking Number: 29554
Amount: $99,274.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Solicitation Year: N/A
Award Year: 1995
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
24 Cherry Hill Drive
Danvers, MA 01923
United States
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Robert Kung
 () -
Business Contact
Phone: () -
Research Institution

Calcification of blood contacting surfaces has been the key impediment to the development of polymevalve prostheses and other polymeric implantables. The deposition of calcium plaques as hydroxyapatiand potentially leads to valve dysfunction. That calcification proceeds preferentially along surfacestress only exacerbates the problem. This work is based on the hypothesis that calcification along farises from increased calcium permeability due to flexion stress/strain. Accordingly, modificationswhich can inhibit calcium adsorption and permeation, and which are stable to cyclic flexion will redof implanted polymeric components. To test this hypothesis, the surfaces of polyetherurethane disks,valved conduits will undergo modification by inert ion implantation and by ion beam assisted depositsialon ceramic. These methodologies alter surface properties at the micron level, but leave bulk polunaffected. In-vitro and in-vivo studies will be conducted to assess the degree to which calcificatibeam based surface modification (IBSM) and to establish the most efficacious of the IBSM treatmentsimplantation.

* Information listed above is at the time of submission. *

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