PROBLEM TO BE SOLVED: To provide a device to enable the selective use of a cutting wire for treating stenosis.SOLUTION: The device (10) for treating a lesion in a body lumen to enlarge a passageway in the body lumen includes a cutting member (20) having a proximal portion and a distal portion (23) and a tracking member (30) having a proximal portion and a distal portion (32). The cutting member and the tracking member are connected at their distal portions with each other and insertable into the body lumen as a unit, the cutting member configured for movement in a direction transverse to a longitudinal axis of the tracking member to widen a gap between the cutting member and the tracking member at least at a distal region.COPYRIGHT: (C)2012,JPO&INPIT【課題】狭窄部を治療する切断ワイヤの選択的使用を可能にする器械を提供する。【解決手段】体内管腔中の病変部を治療して体内管腔中の通路を拡大する器械(10)は、近位部分及び遠位部分(23)を備えた切断部材(20)と、近位部分及び遠位部分(32)を備えた追跡部材(30)とを有する。切断部材と追跡部材は、これらの遠位部分のところで互いに連結されていて、一ユニットとして体内管腔中に挿入可能であり、切断部材は、少なくとも遠位領域のところでの切断部材と追跡部材との間の隙間を広げるよう追跡部材の長手方向軸線を横切る方向に運動可能に構成されている。【選択図】図1
