| 摘要 |
The invention concerns a prosthesis (1c) designed to be implanted in a vascular duct being unfolded by the effect of an expanding balloon, and obtained by cutting a stainless steel tube. It has sufficient malleability to be opened by the expansion of a balloon under pressure not more than 3 bars and particularly pressure between 2.5 bars and 3 bars. Preferably, the prosthesis is obtained by carrying out the following operations on a stainless steel tube (1a), having initial hardness and thickness (e1) greater than the hardness and thickness (e1) required for the final prosthesis: cutting the tube (1a) wall and cleaning it by electropolishing; rapid quenching heat treatment (4), so as to reduce the stainless steel hardness, followed by a second electropolishing treatment (5) for reducing the original tube (1a) initial thickness (e1) while improving its surface state.
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