PROBLEM TO BE SOLVED: To reliably mount and hold a stent, with the diameter thereof reduced, on a balloon, the stent being obtained from a biodegradable polymer and being shape-memorized to a size such that the diameter expands to the internal diameter of a blood vessel or greater.SOLUTION: The invention is obtained from: a stent (2), which is a biodegradable polymer material formed into a tubular shape using polylactic acid having shape memory properties and which is shape-memorized to an expanded diameter size that supports a blood vessel from the inside when implanted inside the blood vessel and a stent-holding member (3) obtained from a biodegradable polymer material, which covers the stent (2) from the outside and holds same with the diameter reduced compared to the shape-memorized size. A stent detection member (8) is installed on the stent (2) and a portion of the stent detection member (8) is fixed to the stent-holding member (3) to prevent the stent (2) from shifting position with respect to the stent-holding member (3).COPYRIGHT: (C)2012,JPO&INPIT【課題】生分解性ポリマーよりなり、脈管の内径以上に拡径される大きさに形状記憶されたステントを、縮径した状態でバルーン上に確実に装着保持する。【解決手段】 生分解性ポリマー材料であって、形状記憶特性を有するポリ乳酸を用いて管状に形成され、脈管内に植え込まれたときにこの脈管を内部から支持する拡径された大きさに形状記憶されたステント2と、このステント2を外周側から覆って、形状記憶された大きさより縮径された状態に保持する生分解性ポリマー材料からなるステント保持部材3とからなり、ステント2にステント検出用部材8を取り付け、ステント検出用部材8にステント保持部材3を固定し、ステント2とステント保持部材3の位置ずれを防止する。【選択図】図4
