PROBLEM TO BE SOLVED: To provide a medical expansion/contraction driving device the responsiveness of which is kept excellent by enabling the degradation factor of the responsiveness to be detected.SOLUTION: The medical expansion/contraction driving device includes: pressure generators (12, 13, 21, 22) for alternately impressing a positive pressure and a negative pressure to a piping system (28) communicated to a device to be driven such that the device to be driven repeats expansion and contraction by flow of a driving fluid a gas tank (18) connected to the piping system through a first control valve (82) a gas replenishing unit (60) for replenishing a gas to the gas tank exhaust unit (83, 84) for exhausting the gas tank a gas concentration detector (72) for detecting the concentration of the gas in the driving fluid of the piping system and controllers (20, 79) for controlling the pressure generator, the first control valve, the gas concentration detector and the exhaust unit.COPYRIGHT: (C)2013,JPO&INPIT【課題】 駆動装置の応答性の低下要因を検知し、駆動装置の応答性を良好に保つことができる医療用膨張・収縮駆動装置を提供する。【解決手段】駆動流体の流動によって被駆動機器が膨張および収縮を繰り返すように、当該被駆動機器に連通する配管系(28)に、陽圧と陰圧とを交互に印加する圧力発生手段(12,13,21,22)と、第1制御弁(82)を介して前記配管系に接続されるガスタンク(18)と、前記ガスタンクにガスを補充するガス補充手段(60)と、前記ガスタンクの排気を行う排気手段(83,84)と、前記配管系の前記駆動流体における前記ガスの濃度を検出するガス濃度検出手段(72)と、前記圧力発生手段、前記第1制御弁、前記ガス濃度検出手段及び前記排気手段を制御する制御手段(20,79)と、を有する医療用膨張・収縮駆動装置。【選択図】図14
