Inventors:
Suzanne Winters - Salt Lake City UT
Kenneth A. Solen - Orem UT
Clifton G. Sanders - Salt Lake City UT
J. D. Mortensen - Sandy UT
Gaylord Berry - Salt Lake City UT
Assignee:
Cardiopulmonics, Inc. - Salt Lake City UT
International Classification:
A01N 100
Abstract:
The present invention is directed to multifunctional thrombo-resistant coatings for use with biomedical devices and implants, such as a coating which includes a siloxane surface onto which a plurality of amine functional groups have been bonded. Covalently bonded to the amine functional groups are a plurality of poly(ethylene oxide) chains, such that a single poly(ethylene oxide) chain is bonded to a single amine functional group. A plurality of different bioactive molecules, designed to counteract specific blood-material incompatibility reactions, are covalently bonded to poly(ethylene oxide) chains, such that a single bioactive molecule is coupled to a single polyethylene oxide chain. The methods of manufacturing the present invention include preparing a material having a siloxane surface onto which a plurality of amine functional groups have been bonded. This is achieved by plasma etching with ammonia gas or by plasma polymerization of a siloxane monomer in the presence of ammonia gas.