PROBLEM TO BE SOLVED: To provide a detention needle assembly capable of facilitating piercing operation regardless of a length of inner or outer needle.SOLUTION: A detention needle assembly 1 comprises: an inner needle 4 having a sharp needle tip on a tip part； an inner needle hub 5 fixed to a base end of the inner needle 4； a hollow outer needle 2 into which the inner needle 4 is inserted； an outer needle hub 3 fixed to a base end part of the outer needle 2； a pressing member 6 detachably connected to the outer needle hub 3； and a grip member 7 which is connected to the inner needle hub 5, protruded to a tip direction from the inner needle hub 5, which is movable to the outer needle 2 and outer needle hub 3 with the inner needle 4 and the inner needle hub 5. The grip member 7 comprises: a bottom plate 71； two wall parts 72, 73 erected on the bottom plate 71； and a lid part 75 provided on an end opposite to the bottom plate 71 of the two wall parts 72, 73. The part of the pressing member 6 is arranged between the bottom plate 71 and the lid part 75, and the outer needle hub 3 is arranged between the bottom plate 71 and the lid part 75.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】内針や外針の長さによらず、穿刺操作を容易に行うことができる留置針組立体を提供すること。【解決手段】留置針組立体１は、先端に鋭利な針先を有する内針４と、内針４の基端部に固定された内針ハブ５と、内針４が挿通される中空の外針２と、外針２の基端部に固定された外針ハブ３と、外針ハブ３に着脱自在に接続された押圧部材６と、内針ハブ５に接続され、内針ハブ５から先端方向に突出し、外針２および外針ハブ３に対し、内針４および内針ハブ５と共に移動可能である把持部材７と、を備えている。把持部材７は、底板７１と、底板７１に立設された２つの壁部７２、７３と、２つの壁部７２、７３の底板７１と反対側の端部に設けられた蓋部７５と、を備えている。押圧部材６の一部は、底板７１と蓋部７５との間に配置され、外針ハブ３は、底板７１と蓋部７５との間に配置されている。【選択図】図１
