PROBLEM TO BE SOLVED: To provide a needle assembly certainly preventing coring, preventing erroneous centesis with a simple structure, and allowing thinning of a port.SOLUTION: This needle assembly 10 is performed with centesis into a septum 7 of the subcutaneous embedment type port 3, and includes: a body part 20 formed with a fluid flow passage 21 thereinside, and having a needle insertion port 26, an outflow port 23, and an inflow port 22 communicating with the fluid flow passage 21 a fluid-introducing tube 30 connected to the inflow port 22 a sheath tube 40 connected to the outflow port 23 a needle insertion path passing the needle insertion port 26, the fluid flow passage 21, the outflow port 23, and the sheath tube 40 a sealing valve 50 allowing needle insertion, and installed in a path to the fluid flow passage 21 from the needle insertion port 26 of the needle insertion path and a solid inner needle 60 inserted into the needle insertion path through the sealing valve 50, and projected from the tip of the sheath tube 40.COPYRIGHT: (C)2012,JPO&INPIT【課題】コアリングを確実に防止することができ、かつ、簡単な構造で誤穿刺を防止でき、更にポートの薄型化を図れる針組立体を提供する。【解決手段】この針組立体10は、皮下埋込型ポート3のセプタム7に穿刺されるものであって、内部が流体流路21をなし、この流体流路21に連通する流入口22と流出口23と針挿入口26とを有する本体部20と、流入口22に接続された流体導入用チューブ30と、前記流出口23に接続された外套管40と、前記針挿入口26、前記流体流路21、前記流出口23、及び前記外套管40を通る針挿通路と、この針挿通路の前記針挿入口26から前記流体流路21に至る経路に装着された針挿入可能な封止弁50と、前記針挿通路に封止弁50を通して挿入され、前記外套管40の先端から突出される中実の内針60とを備えている。【選択図】図4
