Method of improving mechanical heart valve prostheses and...

Details Method of improving mechanical heart valve prostheses and... Method of improving mechanical heart valve prostheses and...

A - Human Necessities

61

L

A61L 27/00 (2006.01) A61F 2/24 (2006.01) A61L 27/30 (2006.01) A61L 33/02 (2006.01) C23C 8/24 (2006.01)

Patent

CA 2192335

A method of improving mechanical heart valve prostheses and other mechanical parts implanted in the human body, by reducing their tendency to contribute to the formation of thrombi and by improving their mechanical and biocompatible properties. The products such as heart valve prostheses, are made of titanium or a titanium alloy which has been treated with pure nitrogen gas under vacuum at high temperature, so that a surface layer of titanium nitride is formed. The invention also relates to products, such as heart valve prostheses, made of titanium or titanium alloy having a surface layer of titanium nitride.

Procédé d'amélioration des valvules prothétiques mécaniques et autres éléments mécaniques implantés dans le corps humain, consistant à réduire leur tendance à former des thrombus, et à améliorer leurs propriétés mécaniques et leur biocompatibilité. Ces produits, tels que des valvules cardiaques prothétiques, sont en titane ou alliage de titane traité avec de l'azote gazeux pur, sous vide et à température élevée, de façon à former une couche superficielle de nitrure de titane. L'invention se rapporte également à des produits tels que des valvules cardiaques prothétiques, en titane ou alliage de titane et dotés d'une couche superficielle de nitrure de titane.

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