PROBLEM TO BE SOLVED: To provide a medical solution infusion implement having such a structure as capable of preventing a medical solution forced into the implement with high pressure from leaking out without any special operation.SOLUTION: An outer needle 310, into which an inner needle 320 is inserted, is stuck into a blood vessel, and after that, the inner needle 320 is drawn out of the outer needle 310. At the time, when the inner needle 320 is drawn out of a through hole of a recessed face member 360, a sealing member 370 closely adheres to the cone-shaped recessed surface of the recessed face member 360. Accordingly, the medical solution will not leak out of the through hole of the recessed face member 360 even if the medical solution is force into the implement with high pressure. Furthermore, when the inner needle 320 is drawn out of the recessed face member 360, the sealing member 370 automatically adheres closely to the cone-shaped recessed face, and therefore, the through hole of the recessed face member 360 can be automatically sealed without requiring exclusive operation, etc.COPYRIGHT: (C)2008,JPO&INPIT【課題】特別な操作をせずとも高圧に圧入される薬液が漏出しない構造の薬液注入用具を提供する。【解決手段】内針320が挿入されている外針310が血管に穿刺されてから、その外針310から内針320が抜去される。このとき、内針320が凹面部材360の貫通孔から抜去されると、その凹面部材360の円錐凹面に密閉部材370が密着する。このため、薬液が高圧に圧入されても凹面部材360の貫通孔から漏出することがない。しかも、内針320が凹面部材360から抜去されると自動的に密閉部材370が円錐凹面に密着する。このため、専用の操作などを必要とすることなく自動的に凹面部材360の貫通孔を密閉することができる。【選択図】図1
