PROBLEM TO BE SOLVED: To provide an aneurysm treatment stent that reliably prevents embolus and intimal thickening of blood vessels, and moreover secures blood flow in terminal small vessels without blocking a bifurcation of the branch vessels.SOLUTION: The body of aneurysm treatment stent 1 expandable in diameter includes a flexible polymer film 2 that tightly covers both inner and outer stent body surfaces. In the stent 1, the polymer film 2 has many fine pores 3 of diameter ranging from 100 to 600 μm opened in the film 2 and formed at substantially equal intervals. The aperture rate of the many fine pores 3 opened in the polymer film 2 ranges from 10 to 60%.COPYRIGHT: (C)2012,JPO&INPIT【課題】確実な塞栓と内膜肥厚を抑制し、しかも、分枝血管の分枝口を塞ぐことなく、末梢側の細い分枝血管への血流が確実に確保できる動脈瘤治療用ステントを提供する。【解決手段】拡径可能な管状のステント1本体の内外両表面に、柔軟なポリマーフィルム2が密着して被覆され、かつ該ポリマーフィルム2に直径100~600μmの多数の微細孔3が略均一な間隔をおいて設けられた動脈瘤治療用ステント1であって、該ポリマーフィルム2に設けられた多数の微細孔3の開孔率が10~60%である。【選択図】図1
