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Abstract

A ventilator in combination with a pneumatic oscillator cartridge comprising a body with an inlet, an outlet, a diaphragm operated valve, and a servo port. An adjustable valve is provided for metering the flow of gas from the outlet to the servo port to provide cyclic operation of the oscillator cartridge. A pneumatic clutching assembly is provided which has an inlet and an outlet. The outlet of the oscillator cartridge is connected to the inlet of the pneumatic clutching assembly. An oscillator canister is provided which has an inlet and an outlet. The outlet of the pneumatic clutching means is coupled to the inlet of the oscillator canister. The oscillator canister has a shaft, a diaphragm mounted on the shaft and separating the canister into first and second chambers. Countersprings are mounted on the shaft. The oscillator canister serves to supply and withdraw small volumes of gas to and from the patient adaptor. The small volumes of gas are superimposed upon the continuous flow of gas to the patient adaptor whereby dynamic volumetric diffusive ventilation is supplied to the patient.

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First Claim