| 摘要 |
PROBLEM TO BE SOLVED: To provide a respiration synchronizer which can accurately calibrate the drift of a detection signal resulting from changes in characteristic of a pressure sensor due to changes with the lapse of time etc., and which can therefore prevent damage to the pressure sensor. SOLUTION: A solenoid selector valve 1 is provided in a tube line 22 between a source of oxygen pressure 21 and a cannula 24 and a solenoid three-port selector valve 2 connects a pressure sensor 25 alternately to a tube line 4 between the solenoid selector control valve 1 and the cannula 24 and to the atmosphere. A control part 3 which receives signals from the pressure sensor 25 controls the solenoid selector valve 1 in synchronization with respiration.
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