Surface and bulk characteristics of a polyether urethane for artificial hearts.
A segmented polyether urethane was used as the blood contacting surface in a series of 10 heart assist devices implanted in calves for periods up to 35 weeks. At termination, each was examined to correlate blood compatibility and device performance with surface properties, chemical purity, physical stability and affinity for lipid absorption.
D000818:Animals; D001672:Biocompatible Materials; D001769:Blood; D002417:Cattle; D003300:Copper / Q000032:analysis; D004987:Ethers / Q000032:analysis; D006354:Heart, Artificial; D011108:Polymers / Q000032:analysis; D011140:Polyurethanes / Q000032:analysis; D012822:Silicon Dioxide / Q000032:analysis; D013314:Stress, Mechanical; D013499:Surface Properties; D013500:Surface Tension; D013927:Thrombosis / Q000209:etiology
D001672:Biocompatible Materials; D004987:Ethers; D011108:Polymers; D011140:Polyurethanes; D012822:Silicon Dioxide; D003300:Copper