| http://www.w3.org/ns/prov#value | - Broadly, the present invention is a system for controlling the flow of inspiratory gas in a volume ventilator, comprising a variable-orifice flow control valve actuated by a stepper motor under the command of a microprocessor, wherein the microprocessor receives signals representing (a) gas pressure upstream from the valve, (b) gas pressure downstream from the valve, (c) gas temperature downstream
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