PROBLEM TO BE SOLVED: To suppress occurrences of complication of bleeding and perforations in a dissection of a submucosal layer, and to simplify surgery to improve reliability of mucosal resection.SOLUTION: A fibrous layer resection instrument 1 includes: a puncture needle member 2 provided at a distal end portion of an elongate insertion body introduced to a distal end of an insertion portion via a channel formed along a longitudinal direction in the insertion portion of an endoscope and puncturing a mucous membrane an incision member 3 including a plurality of flexible protruding parts 3b protruded outward in a radial direction of the puncture needle member 2 at least at intervals in a circumferential direction and deformation means 4 contracting and expanding the protruding parts 3b of the incision member 3 in a radial direction in a fibrous layer disposed between the mucous membrane and a submucosal layer. The puncture needle member 2 is formed into a hollow and cylindrical shape that opens at a distal end and can supply a bulging liquid under the mucous membrane through a through-hole 2a in a center while puncturing the mucous membrane.COPYRIGHT: (C)2014,JPO&INPIT【課題】粘膜下層の剥離時における出血や穿孔形成等の合併症の発生を抑え、手術を簡便にし、粘膜切除術の信頼性を向上する。【解決手段】内視鏡の挿入部に長手方向に沿って形成されたチャネルを介して挿入部の先端に導入される細長い挿入体の先端部に設けられ、粘膜に穿刺される穿刺針部材2と、該穿刺針部材2の半径方向外方に、少なくとも周方向に間隔をあけて突出させられる可撓性のある複数の突出部3bを備える切断部材3と、粘膜と粘膜下層との間に配置される線維層において、該切断部材3の突出部3bを半径方向に縮小拡大させる変形手段4とを備え、穿刺針部材2が、先端に開口する中空の筒状に形成され、中央の貫通孔2aを介して粘膜に穿刺させられた状態で粘膜下に膨隆液を供給可能に構成されている線維層切除器具1を提供する。【選択図】図1
