PROBLEM TO BE SOLVED: To provide an infusion pump capable of constraining the detection accuracy of a bubble sensor from deteriorating by suppressing the propagation of an ultrasound wave caused by a liquid adhered to a tube fitted into the infusion pump, and also to provide a method of cleaning an outer surface of the tube.SOLUTION: An infusion pump 1 comprises: a body part 2 including a tube fitting portion 5 into which a tube 203 is fitted a door part 3 openably/closably attached to the body part and covering the tube fitting portion when closed to the body part a bubble sensor 170 provided with an ultrasound transmitter 170a and an ultrasound receiver 170b which are disposed opposite to each other in the radial direction of and holding the tube fitted into the tube fitting portion when the door part is closed to the body part and a cleaning part 10 for cleaning an intermediate outer surface portion 203a of a tube outer surface interposed between the ultrasound transmitter and the ultrasound receiver in the circumferential direction of the tube, in conjunction with an operation of the door part being closed to the body part.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2019,JPO&INPIT【課題】チューブに付着した液体による超音波の回り込みを抑制することにより、気泡センサの検知精度の低下を抑制可能な輸液ポンプ、及び、輸液ポンプに装着されたチューブの外面の清掃方法、を提供する。【解決手段】輸液ポンプ1は、チューブ203を装着可能なチューブ装着部5を有する本体部2と、本体部に対して開閉可能に取り付けられ、本体部に対して閉じられた状態でチューブ装着部を覆うドア部3と、ドア部が本体部に対して閉じられた状態において、チューブ装着部に装着されているチューブを挟んでチューブの径方向に対向して配置される超音波発信部170a及び超音波受信部170bを備える気泡センサ170と、ドア部が本体部に対して閉じられる動作と連動し、チューブの外面のうち、チューブの周方向において超音波発信部と超音波受信部との間に位置する中間外面部203aを清掃する清掃部10と、を備える。【選択図】図5
