| 摘要 |
An apparatus for monitoring a gas supply connection to a mechanical breathing aid (2) comprises in-line housing (14) containing a measurement chamber(20) for receiving gas from the gas supply and a transceiver arrangement (22,24) operable to emit acoustic energy into and to detect emitted acoustic energy propagated through the measurement chamber (20). A comparator (28) is operably connected to the transceiver arrangement(22,24) to receive therefrom a signal dependent on an amplitude of detected energy and is adapted to generate a control signal from a comparison of the received signal with a reference signal indicative of a target gas usable by a flow control valve (32), preferably also located within the housing (14), to inhibit a gas flow through the breathing aid (2). |
