PROBLEM TO BE SOLVED: To reduce insertion resistance in a dry state.SOLUTION: An insertion nozzle (12) being inserted into a body comprises: a jet port (31) disposed on a tip (41) and jetting an enema liquid a basic diameter part (42) disposed on the tip side along an axial direction and an annular recess part (43) located adjacent to the basic diameter part (42) and recessed inward, relative to the basic diameter part (42). In addition, axial length (L11) from the tip of the insertion nozzle (12) to a rear end of the basic diameter part (43) located on the tip side, is equal to or less than 10 mm.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2016,JPO&INPIT【課題】乾燥状態において、挿入抵抗を低減させること。【解決手段】体内に挿入される挿入ノズル(12)は、先端部(41)に設けられ、浣腸液を噴出するための噴出口(31)と、軸方向に沿って先端側に位置する基本径部(42)と、その基本径部(42)に隣接して位置し、基本径部(42)よりも内側に凹んだ環状凹部(43)とを含む。また、挿入ノズル(12)の先端から、先端側に位置する基本径部(43)の後端までの軸方向長さ(L11)は、10mm以下である。【選択図】図4
