Effects of Head-Out Immersion at 19.18 Ata on Pulmonary Gas Exchange in Man.

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Effects of Head-Out Immersion at 19.18 Ata on Pulmonary Gas Exchange in Man.

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Title: Effects of Head-Out Immersion at 19.18 Ata on Pulmonary Gas Exchange in Man.
Author: Flynn, ET; Saltzman, HA; Summitt, JK
Abstract: Pulmonary gas exchange was studied during the performance of graded exercise in two normal male subjects breathing a mixture of helium and oxygen PIO2=167-172 mm Hg. while immersed to the chin in water at a simulated depth of 600 ft (19.18 Ata.) When compared to control observations at a simulated depth of 5 ft (1.15 Ata), exercise at 19.18 Ata was accompanied by decreases in respiratory rate, Ve and (A-a) D02 and by increases in VT, VD, and Pac02. These changes were believed to be due to the interaction of several factors including the increased density of the inspired gas medium, the added external resistance to respiration, the hydrostatic pressure of the environment and the influence of immersion on pulmonary gaseous and blood volumes. In neither subjects, however, were the alterations in ventilatory or gas exchange parameters sufficient to impair the performance of heavy exercise or to produce arterial hypercapnia or hypoxemia. (Author)
Description: Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center (http://www.dtic.mil/) is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested.
URI: http://archive.rubicon-foundation.org/4611
Date: 1972

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