PROBLEM TO BE SOLVED: To provide an intravascular treatment instrument in which the outflow from a blood vessel is prevented, a special catheter is not required and an embolus can be arbitrarily removed in the blood vessel.SOLUTION: The intravascular treatment instrument includes microparticles of a pH-responsive water-swellable polymer which swell in water at &gepH 7 and, after swelling in water, have an average particle diameter of 50-100 &mum.COPYRIGHT: (C)2012,JPO&INPIT【課題】血管からの流出が抑制され、特殊なカテーテルが不要であり、かつ血管内で塞栓を任意に解除しうる血管内用処置材を提供する。【解決手段】pH7以上の条件下で水膨潤し、かつ水膨潤後の平均粒子径が50~100μmであるpH応答性水膨潤性高分子微粒子を含む、血管内用処置材である。【選択図】なし
