SELF-EXPANDING ENDOPROSTHESIS

摘要

The radially expanding core (1) is made from braided metal wire subjected to a treatment which enables its structural state to pass from one level of rigidity to a higher one when undergoing a temperature change between ambient temperature and blood heat. The metal used for the wire is superelastic, and is selected from nickel-titanium and nickel-titanium-cobalt alloys with between 52 and 56 per cent by weight of nickel. It its radially expanded state the wires of the core cross one another at an angle of 30 - 90 degrees.