[abstract] METABOLIC COSTS ASSOCIATED WITH MECHANICAL CARBON DIOXIDE SCRUBBING PROTOCOLS.

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[abstract] METABOLIC COSTS ASSOCIATED WITH MECHANICAL CARBON DIOXIDE SCRUBBING PROTOCOLS.

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Title: [abstract] METABOLIC COSTS ASSOCIATED WITH MECHANICAL CARBON DIOXIDE SCRUBBING PROTOCOLS.
Author: Stepke, BK; Ryder, SJ; Francis, TJR; Wray, DD
Abstract: BACKGROUND: It is essential to survivors of a disabled submarine to control the concentration of CO2 within prescribed limits. In the absence of electricity, manpower must be used to operate scrubbing equipment. We are currently evaluating the effectiveness of the available man-powered scrubbing techniques: the USN spreading and stirring of LiOH, and the bellows used by the British. The CO2 production associated with these techniques may make a significant contribution to atmospheric levels. The present study is designed to measure this contribution. METHODS: Ten male subjects, representative of submarine service personnel were recruited. Subjects were aged 28.2 +/- 2.5 years (range 18-43), weighed 82.6 +/- 4.1kg, height 1.81 +/- 0.18 m. Respiratory measures (tidal volume and breathing frequency) and mixed expired gas O2 and CO2 levels were monitored during; rest in supine, sitting and standing positions, stirring and fanning (simulated) LiOH, and operating the bellows. From these measures, VO2 and VCO2 were calculated (reported in STPD). All maneuvers were performed for at least 15 minutes with ten minute rest periodsbetween each. Data are expressed as mean +/- sem. Statistical significance was tested for at the the p less than 0.05 level using Student t tests. RESULTS: Resting VO2 and VCO2 measures at the different postures were not significantly different with the exception of VO2 while standing at rest, which was significantly elevated over both sitting and supine positions. Stirring and fanning was associated with a sgnificant increase in both VO2 and VCO2 and it was significantly different from all other conditions. CONCLUSION: Man powered scrubbing techniques are associated with significant increases in VO2 and VCO2. Operation of the bellows causes the greatest increase in metabolic activity.
Description: Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org )
URI: http://archive.rubicon-foundation.org/617
Date: 1998

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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