FLOW-RESISTANCE CHARACTERISTICS OF "W" OXYGEN MASKS

Authors
  1. Buick, F.
  2. Porlier, J.A.G.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The flow-resistance characteristics of the newly-designed "W" oxygen mask have been compared to those of the standard P/Q mask. With the mask or its components fixed in appropriate sealing plates, the cavity pressures required to achieve static flows were measured. For the dynamic test, a carbon-dioxide rebreathe system was used. Both types of mask satisfied Air Standardization Coordinating Committee criteria for allowable flow resistance. Although the mask cavity pressures were similar for inspiratory flows, the "W" mask required substantially less presssure than the P/Q mask for expiratory flow. Analysis of events within breaths suggested that inertial resistance contributes to the mask cavity pressures developed.
Report Number
84-R-34 —
Date of publication
15 Sep 1984
Number of Pages
45
DSTKIM No
85-00056
CANDIS No
44896
Format(s):
Hardcopy;Originator's fiche received by DSIS

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