METHOD AND DEVICE FOR PRODUCING ENDOPROSTHESIS BLANKS FROM CARBON-CONTAINING MATERIAL Russian patent published in 2001 - IPC

FIELD: medical engineering. SUBSTANCE: method involves precipitating heat- compensating carbon layer having epitactic anisotropic structure sublayers before precipitating constructional carbon-containing material from gas phase direct to underlying graphite sublayer. The epitactic sublayers structure is to be gradually changed from anisotropic structure to grain isotropic one concurrently with precipitation process. Precipitation from material gas phase is carried out over the surface equidistant with respect to emitting reactor heater radiation surface to provide physical and mechanical properties of the cultivated material to be uniform all over the precipitation surface perimeter. Precipitation conditions like specific mass flow rate of gas mixture supplied into the precipitation chamber, precipitation surface temperature and gas mixture pressure in the chamber are supported unchanged during the constructional carbon- containing material onto the internal surface of the underlying sublayer. The device has also several additional heat distribution transferring sublayer holders used with tubular underlying sublayers. EFFECT: excluded internal stresses in construction material for producing heart valves. 14 cl, 4 dwg 4 tbl