THE PERFORMANCE OF A SCAVENGING VALVE |
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| Authors: | FOSTER P A |
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| Institution: | Department of Anaesthesia, University of Stellenbosch Medical School and Tygerberg Hospital P.O Box 63, Tygerberg 7505, S. Africa |
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| Abstract: | A simple, compact and lightweight device for coupling activescavenging systems to shrouded breathing system valves is described.Provided a scavenging minute flow rate greater than the expiredgas volume is available, the unit can handle automatically changesin both variables. Optimal function is achieved with scavengingflows from about twice the discharged gas flow to about 50 litremm–1 At these flows the valve can accommodate the outflowof gas-driven ventilators where driving gas and circuit gasare discharged through the same port There is no interferencewith expiratory valve function in the event of scavenging failure |
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