Problem to be solved: to provide a treatment method and a medical instrument set capable of properly transmitting the operation of the hand side to the tip side.Solution: a medical instrument 1 having a stent for treating a patients tubular lumen, a long shaft part 10, a pulling part, and a hand operating part 80 for allowing traction of a pulling part, a body part 111 into which an internal cavity is formed through which a shaft part is inserted, and an opening opening communicating with the lumen A catheter 110 having a length of 119a, 119b and longer than the exposed length of the shaft portion exposed in the longitudinal direction from the tip opening portion in the state in which the body portion is inserted into the lumenThen, the distal end of the catheter is delivered to the vicinity of the subject of treatment of the living body lumen, and the shaft part is inserted into the internal cavity of the catheter, and the part in which the stent is held in the shaft part is projected from the tip opening of the catheter, and it is delivered to the treatment subject site, and the traction part is operated The stent is treated with the stent.Diagram【課題】手元側の操作を先端側に適切に伝達できる治療方法及び医療器具セットを提供する。【解決手段】患者の生体管腔に処置を施すステントと、長尺状のシャフト部10と、牽引部と、牽引部の牽引操作を可能にする手元操作部80と、を備える医療器具1と、シャフト部を挿通させる内腔が形成された本体部111と、内腔に連通する先端開口部119a、119bと、を備え、本体部が、内腔にシャフト部を挿通させた状態において先端開口部からシャフト部が長手方向に露出する露出長さよりも長く形成されたカテーテル110と、を用意し、カテーテルの先端開口部を生体管腔の処置対象部位の近傍まで送達し、シャフト部をカテーテルの内腔に挿通し、シャフト部においてステントを保持した部分をカテーテルの先端開口部から突出させて処置対象部位に送達し、牽引部を操作して、ステントにより処置対象部位に対して処置を行う。【選択図】図1
