AUTOMATIC TRANSPORT VENTILATOR WITH MONITORING ALARMS

摘要

A transport ventilator device for administering a breathable gas under pressure to a patient by an operator, the device having controls powered by said pressurised gas in a manual override mode, a patient breathing demand override mode, and an automatic mode, the device comprising: a housing (1) enclosing a patient breathing circuit comprising a gas accumulation chamber (2); a breathing chamber (8); breathing check valve (7) means therebetween for permitting one way passage of inhaled gas from the accumulation chamber (2) to the breathing chamber (8); and exhale check valve means (10) for permitting passage patient exhaled breath from the breathing chamber (8) to atmosphere external to the device; a pressure regulator (13) having regulator input port (14) means for admitting said gas into the device from a source (12) of pressurised gs, and having a regulator outlet; gas distribution means for distributing gas between the regulator outlet (13) and the gas accumulation chamber (2) selectively via a manual circuit, a demand circuit and an automatic circuit; control means, powered solely by the pressure differential between the pressurised gas from the regulator input port means (14) and atmospheric pressure external to the device, for monitoring and controlling said gas distribution means, wherein the control means include: breathing circuit integrity alarm means (63) for notifying the operator that an integrity condition has been detected.