PROBLEM TO BE SOLVED: To provide a treatment device of a simple structure that can expand in a position to treat an organism lumen while sustaining a fluid flow in the organism lumen, and provide a treatment method.SOLUTION: A treatment device 10 has a long body 20 that can be inserted into an organism lumen, and at least one thin plate body 31 that is formed into a thin plate shape with a side end fixed to an outer peripheral surface 21 of a tip end of the long body 20 and expandable from a state of being contracted to the inside in a radial direction by being wound around the long body 20 to the outside in the radial direction by a self restoring force.COPYRIGHT: (C)2014,JPO&INPIT【課題】簡単な構造であり、生体管腔内の流体の流れを維持しつつ生体管腔の処置対象の位置にて拡張可能な治療デバイスおよび治療方法を提供する。【解決手段】生体管腔内へ挿入可能な長尺体20と、前記長尺体20の先端側の外周面21に側端が固定される薄板状に形成され、前記長尺体20に巻きつけられて径方向内側に収縮した状態から自己復元力によって径方向外側へ拡張可能な少なくとも1つの薄板状体31と、を有する治療デバイス10である。【選択図】図1
