• Anaesth Intensive Care · Feb 1980

    An analysis of the performance of a variable venturi-type oxygen mask.

    • D F Woolner and J Larkin.
    • Anaesth Intensive Care. 1980 Feb 1; 8 (1): 44-51.

    AbstractThe theoretical performance of the Hudson Multivent mask is considered. A method is described of determining the flow-weighted mean inspired oxygen concentration produced by the mask. Using this method, it was found that the inspired oxygen concentration was predictable only at the 24% setting using the recommended flow rates, but that increasing the supplied-oxygen flow rates above the recommended levels resulted in the return of predictable function. At settings above 30% predictable function was found to be unlikely, whatever the supplied oxygen flow rate. Recommendations are made regarding the use of this device.

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