Xe133 elimination from human fat during negative- and positive-pressure breathing

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Xe133 elimination from human fat during negative- and positive-pressure breathing

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Title: Xe133 elimination from human fat during negative- and positive-pressure breathing
Author: Balldin, UI; Liner, MH
Abstract: The elimination of Xe133 from a deposit in the subcutaneous adipose tissue outside the anterior tibial muscle was recorded by an external scintillation detector in 16 human subjects during normal breathing, negative-pressure breathing (-20 cm H2o), and positive-pressure breathing (+20 cm H2O). The ambient temperature was kept at 28.0 degrees C +/- 0.1 degrees, which can be considered a neutral temperature. The xenon clearance rate was increased during negative-pressure breathing by a mean of 68 percent and decreased during positive-pressure breathing by a mean of 73 percent when compared to normal breathing. The xenon-elimination rates during the different conditions may reflect corresponding changes in adipose-tissue blood flow. Because both negative- and positive-pressure breathing may occur during diving, the uptake and elimination of inert gases in adipose tissue of a diver may be influenced; thus, the risk of decompression sickness might also be affected. The results may therefore be of importance in diving routines and in the construction of breathing apparatus for divers. Adipose Tissue/blood supply/*metabolism Blood Circulation *Diving Human Inert Gas Narcosis/prevention & control Male Masks/standards Naval Medicine Positive-Pressure Respiration Radioisotopes/*metabolism *Respiration, Artificial Ventilators, Mechanical Xenon/*metabolism
Description: Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org )
URI: PMID: 781973
http://archive.rubicon-foundation.org/2747
Date: 1976

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  • Undersea Biomedical Research Journal
    The Undersea Baromedical Research journal was published by the Undersea Medical Society, Inc. (now the Undersea and Hyperbaric Medical Society) quarterly from 1974 to 1992 when the name changed to the Undersea and Hyperbaric Medicine Journal.

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