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Effects of water immersion to the neck on pulmonary circulation and tissue volume in manA rapid noninvasive breathing method is used to obtain serial measurements of the pulmonary capillary blood flow, diffusing capacity per unit of alveolar volume, combined pulmonary tissue plus capillary volume, functional residual capacity, and oxygen consumption in five normal subjects undergoing 6 h of sitting, 4 h of sitting while immersed to the neck in thermoneutral water, and 4 h of lying in thermoneutral water to the neck. The rebreathing method employed a test gas mixture containing 0.5% C2H2, 0.3% C(18)O, 10% He, 21% O2, and balance N2. It is shown that immersion to the neck in the seated posture results in significant increases in sodium excretion cardiac output, and diffusing capacity per unit of alveolar volume. The pulmonary tissue plus capillary volume did not change, demonstrating that the central vascular engorgement induced by water immersion is not accompanied by significant extravasation of fluid into the pulmonary interstitial space.
Document ID
19760042489
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Begin, R.
(Mount Sinai Medical Center Miami Beach, FL, United States)
Epstein, M.
(Mount Sinai Medical Center Miami Beach, FL, United States)
Sackner, M. A.
(Mount Sinai Medical Center Miami Beach, FL, United States)
Levinson, R.
(Mount Sinai Medical Center Miami Beach, FL, United States)
Dougherty, R.
(Mount Sinai Medical Center Miami Beach, FL, United States)
Duncan, D.
(Mount Sinai Medical Center Miami Beach; U.S. Veterans Administration Hospital, Miami, Fla., United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1976
Publication Information
Publication: Journal of Applied Physiology
Volume: 40
Subject Category
Aerospace Medicine
Accession Number
76A25455
Funding Number(s)
CONTRACT_GRANT: NGR-10-007-097
CONTRACT_GRANT: F41609-74-C
Distribution Limits
Public
Copyright
Other

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