PROBLEM TO BE SOLVED: To provide a detention needle device capable of easily and safely releasing the fastening of an inner needle and an outer needle in a state in which the needles are punctured into a patient.SOLUTION: An inner unit 3 can be moved to an outer unit 2 from an initial position in which an inner needle 50 protrudes from the tip of an outer needle 30 to a retreat position in which the inner needle is accommodated in a shield 20. A stopper 70 includes an insertion part 71 that can be inserted into the shield, and a base part 72 provided to the rear end of the insertion part. The base part 72 includes an arm 75 that can be elastically bent and deformed, and a pressing part 76 provided to the arm. In an initial state in which the insertion part is inserted into the shield, and a front end 71a of the insertion part is brought into contact with an inner hub 40 of the inner unit in the initial position, when the arm is elastically deformed, the pressing part pushes out the outer unit forward.SELECTED DRAWING: Figure 1ACOPYRIGHT: (C)2017,JPO&INPIT【課題】内針と外針とが固着していた場合にも、患者に穿刺した状態でその固着を容易且つ安全に解除することを可能にする。【解決手段】内針50が外針30の先端から突出する初期位置から、内針がシールド20内に収納される後退位置へ、内ユニット3を外ユニット2に対して移動させることができる。ストッパー70は、シールド内に挿入可能な挿入部71と、挿入部の後端に設けられた基部72とを備える。基部72は弾性的に曲げ変形可能なアーム75と、アームに設けられた押部76とを含む。挿入部をシールド内に挿入し且つ挿入部の前端71aを初期位置にある内ユニットの内ハブ40に当接させた初期状態において、アームを弾性的に変形させると、押部が外ユニットを前方に向かって押し出す。【選択図】図1A
