Stent with rough surface and its manufacturing method

摘要

The stent has outer, inner and side surface portions roughened to a predetermined extent to which a drug e.g. tacrolimus or a therapeutic agent is applied. The drug is applied to the surface by spraying. Imperfections e.g. burrs are removed before roughening the surface by sandblasting using corundum. The stent made of stainless steel is annealed after roughening to make it more flexible. Independent claims are also included for the following: (a) a balloon catheter device for inserting a tubular stent (b) a method for fabricating a stent for placement in a body lumen.