The needle assembly which possesses the needle of the air which has the distal (2036) edge and the proximal edge of form is disclosed. As for the assembly, in addition, leading with the distal (2036) hub edge and have the open part the proximal hub edge and the above-mentioned distal (2036) edge and the proximal edge which are connected to stationary type to the needle it possesses the needle hub which has with the passage which extends. In addition, the valve, is arranged inside the above-mentioned passage. As for the valve, the needle and the proximal hub edge of 1st position and the above-mentioned air which are the plunger which is arranged in the vicinity of the seal component and the said seal component which at least have one which inside that is provided perforation hole, way the needle and the proximal hub edge of the above-mentioned air mutually fluid passing possibly you do not communicate, in order are in the position where description above at least one perforation hole is closed mutually fluid passing possibly to communicate, the above-mentioned plunger has with the sliding possible plunger for the position where description above at least one perforation hole was opened with the 2nd position which is in the position where energization it does.尖形状の遠位端及び近位端を備えた中空のニードルを有するニードルアッセンブリが開示される。アッセンブリは、また、ニードルに固定式に接続された遠位ハブ端と、開口部を備えた近位ハブ端と、上記遠位端と近位端との間に通じて延びる通路とを備えたニードルハブを有する。また、バルブが、上記通路内に配置される。バルブは、その内部に設けられた少なくとも1つの貫通孔を備えたシール部材と、該シール部材の近傍に配置されたプランジャであり、上記中空のニードル及び近位ハブ端が互いに流体通過可能に連絡しないように、上記少なくとも1つの貫通孔が閉ざされる位置である第1の位置と、上記中空のニードル及び近位ハブ端が互いに流体通過可能に連絡するように、上記プランジャが上記少なくとも1つの貫通孔を開いた位置に付勢する位置である第2の位置との間で摺動可能なプランジャとを備える。
