PROBLEM TO BE SOLVED: To solve the following problem: in a deep venipuncture operation, the actual puncture needle may not be pierced into a vein though a test puncture was successfully performed for the reason that the test puncture needle is withdrawn after a vein is determined, and the actual puncture need cannot advance through the same path as the test puncture needle.SOLUTION: A trocar is mounted to a tip end opening of a T-shaped tube, the tip end opening of the T-shaped tube being male, and both the tail end opening and the side opening are female. A 22G stainless tube is then secured to the tail end opening of the T-shaped tube, the 22G stainless tube having a length that its tip end protrudes a few millimeters from the tip end of the trocar when it is inserted into the T-shaped tube through the tail end opening, and the stainless tube being provided with a bent section. A guide wire is indwelt inside a deep vein through a 22G test puncture needle and the guide wire is used as a guide shaft to reliably guide a puncture needle into the deep vein.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】深部静脈穿刺術において、試験穿刺に成功しても本穿刺針が静脈内に刺入されないことがある。その理由は、試験穿刺針は静脈確認後一旦抜去され、本穿刺針が試験穿刺針と同一の経路を進行することができないからである。【解決手段】先端口がオスルアーで尾端口と側口がメスルアーよりなるT字管の先端口に外套針を装着し、尾端口からT字管内に挿入した場合先端が外套針先端から数mm突出する長さの22Gステンレス管をT字管の尾端口に固定すると共に、22Gステンレス管に屈曲部を設け、22G試験穿刺針を通じて深部静脈内に留置したガイドワイヤーを案内軸として、穿刺針を深部静脈内に確実に誘導する。【選択図】図1
