METHOD FOR MANUFACTURE OF PROSTHETIC HEART VALVE

摘要

FIELD: medical equipment industry. SUBSTANCE: method includes manufacture of body and shutoff member of preset configuration; its polishing; ionic bombardment cleaning of valve components to remove oxide film in inert gas medium; application of thrombo-resisting carbon coating to heated parts and assembly of valve. Ionic bombardment cleaning of valve components is carried out at temperature of 250 20 C in vacuum of P = Pa and with protein of V = V maintained across valve components relative to titanium target - anode of electric arc plasma source. Then, current of arc is set up I = A and arc supply voltage V = V, potential across valve components V = V and under these conditions, titanium adhesive sublayer is applied at P = Pa, then layer of titanium nitride reinforcing the surface is applied. To form this layer, nitrogen is introduced to attain total pressure of P = Pa and again, one more adhesive sublayer of titanium is applied thickness of intermediate coating of m. Then, carbon coating is applied from pulse source of carbon plasma with density of (10-9-10-11) kg/cu. m at coating condensation rate of m/pulse, radiation energy of J to attain the total thickness of coating not in excess of m. EFFECT: higher functional service life of valve.