As for ritorakuta of this invention, in the exclusion section and the said exclusion section which possess the distal end of sluggish form to have the handle section which is provided in the proximal edge of induction, and the said induction which extending facilities are done, the said exclusion section and the said induction to have interposition possible major diameter in the disposal tool channel of the endoscope, the said exclusion section to be formed from the operational wire and the fixed wire of the multiple manuals, the said operational wire to penetrate completely the said induction, the proximal edge of the said fixed wire to be locked by the distal end of the said induction, the distal end of the said operational wire saidThe distal end of the fixed wire is junction, the said exclusion section can reveal kokun form by pulling the proximal edge of the said operational wire on handle section side and in the said handle section. ritorakuta of this invention, because interposition path from the body table is not needed, is useful in intraperitoneal Kiyouka operation and low operation of the invasive Characteristic of NOTES and the like.本発明のリトラクターは、鈍い形状の遠位端を有する圧排部、該圧排部に延設された導入部、および該導入部の近位端に設けられたハンドル部を備え、該圧排部および該導入部は、内視鏡の処置具チャンネルに挿入可能な外径を有し、該圧排部は、可動ワイヤと複数本の固定ワイヤとから構成され、該可動ワイヤが該導入部を貫通し、該固定ワイヤの近位端が該導入部の遠位端に固定され、該可動ワイヤの遠位端と該固定ワイヤの遠位端とが接合されており、そして該ハンドル部において、該可動ワイヤの近位端をハンドル部側に引っ張ることにより、該圧排部がコクーン形状を発現し得る。本発明のリトラクターは、体表からの挿入経路を必要としないため、腹腔鏡下手術やNOTESなどの低侵襲性の手術に有用である。
