PROBLEM TO BE SOLVED: To provide an intraluminal device capable of effectively occluding or contracting a dilated vein.SOLUTION: An intraluminal device 130 for treating a vein 150, includes a long outer sheath 132, an inner tube 134 disposed inside the outer sheath 132, and an expandable expansion member 144. The expansion member 144 is disposed between a distal part of the long outer sheath 132 and a distal part of the inner tube 134, the inner tube 134 is fixed to the distal part of the expandable expansion member 144, and the distal part of the long outer sheath 132 is fixed to the expansion member 144. The expansion member 144 includes a plurality of spiral contact members 148 elongated along the axial direction, in the circumferential direction. The distal part of the expansion member 144 comes close to a proximal part of the expansion member 144 by the axial movement of the inner tube 134 with respect to the long outer sheath 132, so that the contact members 148 bend outward in the radial direction to expand the expansion member 144.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2016,JPO&INPIT【課題】拡張した静脈を効果的に閉塞または収縮させることができる管腔内デバイスを提供する。【解決手段】静脈150を治療するための管腔内デバイス130であり、長尺外側シース132と、外側シース132の内側に配置される内管134と、拡張可能な拡張部材144とを有し、拡張部材144は、長尺外側シース132の先端部分と、内管134の先端部分との間に配置され、内管134は、拡張可能な拡張部材144の先端部分に固定され、長尺外側シース132の先端部分は、拡張部材144に固定され、拡張部材144は、軸方向に沿って伸長する螺旋状の接触部材148を円周方向に複数備え、長尺外側シース132に対する内管134の軸方向移動により、拡張部材144の先端部分が拡張部材144の基端部分に接近して接触部材148が径方向外側へ撓んで拡張部材144が拡張する。【選択図】図6
