BIODEGRADABLE PARTICLES FOR MEDICAL TREATMENT AND VASCULAR EMBOLIZATION MATERIAL

摘要

The purpose of the invention is to provide biodegradable particles for medical treatment and a vascular embolization material, the inadequate softness of which has been improved, the particles do not aggregate with each other easily, and the particle shape-restoring force after passing through a catheter, etc. has been improved. The invention provides biodegradable particles for medical treatment obtained from a tri-block copolymer of an A1-B-A2 form, wherein A1 and A2 are blocks of biodegradable copolymers configured from monomers comprising glycolic acid, lactic acid and 6-hydroxycaproic acid, and B is a block of a water-soluble polymer.