Is the Vroman effect of importance in the interaction of blood with artificial materials?
The successive displacement of plasma proteins adsorbed to artificial surfaces (biomaterials) is well documented, mostly by specially designed experiments that stretch out the effect in time and space. Analysis of displacement has been focused principally on molecular events on the adsorbing surface. In this paper attention is directed rather to the antecedent transport phenomena necessary to deliver successive proteins to a surface. The different limitations on protein arrival fixed by the total quantity present and by the rates of transport of super-sufficient quantities are distinguished. The transport perspective is then used to ask, and partly answer, the question: Can protein displacement be responsible for patterns of thrombus formation and cellular adhesion that are seen on the blood-wetted surfaces of devices found in medical practice: artificial organs and vascular prostheses? Calculations and a small amount of preliminary data suggest that such patterns may form when blood is introduced into these devices, particularly in the neighborhood of boundary shapes that cause separated flows.
Leonard
E F
EF
Artificial Organs Research Laboratory, Columbia University, City of New York, NY 10027.
Vroman
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L
D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism*; D001775:Blood Circulation / Q000502:physiology; D001798:Blood Proteins / Q000737:chemistry / Q000378:metabolism*; D001807:Blood Vessel Prosthesis; D006801:Humans; D008954:Models, Biological; D010949:Plasma / Q000737:chemistry / Q000378:metabolism*; D013499:Surface Properties
D001672:Biocompatible Materials; D001798:Blood Proteins