PROBLEM TO BE SOLVED: To provide a catheter which quickly stops bleeding and eludes chemicals, while ensuring sufficient blood flow in the blood vessel.SOLUTION: An expanding/contracting member 16 which is constituted of a plurality of wires 24 is attached to the distal end of a catheter body 12. An operating tube 14 is pushed/pulled to/from the catheter body 12 to deform the expanding/contracting member 16 so as to be expanded or contracted. A membrane 18 for medical treatment is attached to the outer peripheral surface of the expanding/contracting member 16 to constitute the catheter 10. When the expanding/contracting member 16 is deformed to increase or reduce the diameter in the blood vessel 34, to press an injured area 36 for stopping bleeding with the membrane 18 for medical treatment, or a chemical is eluded after expanding a narrowed area, sufficient blood flow can be ensured through the inside of the expanding/contracting member 16.COPYRIGHT: (C)2013,JPO&INPIT【課題】血管内での血流量を充分に確保しつつ、止血処置および薬剤溶出を速やかに行うことができるカテーテルの提供。【解決手段】複数本の線材24で構成された拡縮部材16をカテーテル本体12の遠位端に取り付けて、操作チューブ14をカテーテル本体12に対して押引操作することで拡縮部材16を拡縮変形可能とすると共に、拡縮部材16の外周面に治療用膜18を取り付けることによりカテーテル10を構成した。本発明のカテーテル10によれば、血管34内で拡縮部材16を拡径変形させて治療用膜18で損傷部位36を圧迫止血したり、狭窄部位拡張後に薬剤を溶出する際、拡縮部材16内を通じて血流を確保することができる。【選択図】図3
