[Physical properties of expandable metallic stents; including the procedure of stent production].

Nowadays expansile force of self-expandable metallic stent is estimated by only wall-distending pressure P. We estimated the expansile force of the stent by not only P but also F. F expressed the degree of digging into the vessel wall and was defined as a force per one unit length of wire. P and F were thought to be useful in selecting the best stent. We also introduced the procedure of stent production.