PROBLEM TO BE SOLVED: To increase accuracy of a liquid dosing rate by drip infusion into a patients vein.SOLUTION: A constant size droplet drip tube is characterized by including: a transparent and elastic cylindrical body with a bottom in resin a lid for closely closing a top opening of the cylindrical body a cylindrical outflow port protruding downward from the bottom of the cylindrical body and coming in communication with the inside of the cylindrical body a cylindrical inflow port protruding upward from the lid a protrusion having an internal passage coming in communication with the inflow port and protruding from the lid toward the inside of the cylindrical body a drip infusion opening coming in communication with the internal passage and being opened in the protrusion and a drop size regulation member being separated by a predetermined distance from the protrusion to at least lower part in the cylindrical body and facing the protrusion, breaking the droplet by that the liquid flowing into the internal passage from the inflow port and flowing out from the drip infusion opening comes in contact with the droplet formed by suspending from the protrusion, and regulating the growing of the droplet to a predetermined size or more.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】患者の静脈内への点滴による液体の投与速度の精度を高めることにある。【解決手段】透明で弾性がある樹脂製で底部を有する筒体と、前記筒体の頂部開口を密に塞ぐ蓋体と、前記筒体の底部から下方に突出するとともに前記筒体内に連通する筒状の流出口と、前記蓋体から上方に突出する筒状の流入口と、前記流入口に連通する内部通路を有するとともに前記蓋体から前記筒体内へ向けて突出する突出部と、前記内部通路に連通するとともに前記突出部で開口する点滴口と、前記筒体内で前記突出部から少なくとも下方に所定距離離間してその突出部と対向し、前記流入口から前記内部通路に流入して前記点滴口から流出した液体が前記突出部から垂下して形成する液滴と接触することによりその液滴を破壊して、その液滴の所定寸法以上への成長を規制する液滴寸法規制部材と、を具えることを特徴とする定寸法液滴点滴筒である。【選択図】図3
