PROBLEM TO BE SOLVED: To provide a medical instrument which can carry out ligation within a living body safely and efficiently even only by an operator or by an operator and an assistant.SOLUTION: The medical instrument comprises a suture inserting puncture needle 20, a suture holding puncture needle 30, a stylet 40 inserted slidably within the suture holding puncture needle 30, and a fixing member 50 on which the suture inserting puncture needle 20 and the suture holding puncture needle 30 are fixed. When an annular member 42 formed on the distal end of the stylet 40 is projected from the distal end of the suture holding puncture needle 30, the central axis of the suture inserting puncture needle 20 or its extension extends through the inside of the annular member 42. A sending mechanism 60 for sending a suture S successively in the distal direction is arranged on the proximal end side of the suture inserting puncture needle 20. In addition, a projecting mechanism 70 that makes the annular member 42 received within the inside of the suture holding puncture needle 30 to project from the distal end of the suture holding puncture needle 30 is arranged on the proximal end side of the suture holding puncture needle 30.COPYRIGHT: (C)2008,JPO&INPIT【課題】生体内における結紮を、術者1名のみ、あるいは術者と補助者の2名でも効率良く安全に行うことができる医療用器具を提供する。【解決手段】縫合糸挿入用穿刺針20と、縫合糸把持用穿刺針30と、該縫合糸把持用穿刺針30の内部に摺動可能に挿入されたスタイレット40と、縫合糸挿入用穿刺針20および縫合糸把持用穿刺針30が固定された固定部材50とからなり、スタイレット40の先端に形成された環状部材42は、縫合糸把持用穿刺針30の先端より突出させた時、縫合糸挿入用穿刺針20の中心軸またはその延長線が、該環状部材42の内部を貫通するように延び、縫合糸挿入用穿刺針20の後端側に、縫合糸Sを先端方向へ順次送り出す送出機構60を設け、縫合糸把持用穿刺針30の後端側に、該縫合糸把持用穿刺針30の内部に収納された環状部材42を縫合糸把持用穿刺針30の先端より突出させる突出機構70を設けた。【選択図】図1
