BIODEGRADABLE STENT WITH GROOVES AND THE PREPARATION METHOD THEREOF

摘要

Disclosed are a biodegradable polymer stent with grooves and preparation method thereof. The biodegradable polymer stent comprises a stent main body, magnetic nano particles and a coating layer, wherein the grooves are excavated at parts of bearing stent deformation or all parts of the stent main body, and the magnetic nano particles are arranged in the grooves. The temperature of the magnetic nano particles is increased through an external alternating magnetic field to heat the stent. After the stent is heated and expanded, the stent is cooled, fixed and formed in a body, the retraction rate can be decreased to less than 10 percent, and the consequences such as collapse, displacement and the like are avoided. At the same time, by heating the stent through the magnetic nano particles, the thermal damages to the wall of a blood vessel can be minimized.