Please use this identifier to cite or link to this item: http://hdl.handle.net/10125/11312

Water content of expired air in man

File Description Size Format  
uhm_phd_6713690_uh.pdf Version for UH users 4.61 MB Adobe PDF View/Open
uhm_phd_6713690_r.pdf Version for non-UH users. Copying/Printing is not permitted 4.65 MB Adobe PDF View/Open

Item Summary

dc.contributor.author Buck, Alan Charles
dc.date.accessioned 2009-09-09T19:17:05Z
dc.date.available 2009-09-09T19:17:05Z
dc.date.issued 1967
dc.identifier.uri http://hdl.handle.net/10125/11312
dc.description Typescript.
dc.description Thesis (Ph. D.)--University of Hawaii, 1967.
dc.description Bibliography: leaves 167-172.
dc.description vii, 172 l illus., tables
dc.description.abstract Five determinants of the water content of air expired by man were examined and attempts made to quantify each determinant. Each of the four determinants: ambient temperature, ambient humidity, tidal volume and respiratory frequency was examined at both sea level and altitude. The data collected from 14 men, at 7 ambient temperatures (-35° to +35° C), and 5 minute ventilation rates (which formed a continuum from 4 to 80 L STPD/min.), were corrected and statistically analyzed by computer. The results, presented in graphic, tabular and algebraic form, permit calculation of expired water or net water loss through the respiratory tract in man with corrections for minute volume, ambient temperature, gas density and ambient humidity. An attempt is made to explain the results presented using the notations of thermodynamics. It is assumed that the human respiratory tract is an efficient but limited counter-current heat and mass (water) exchange system. As such, the caloric requirements for equilibrating the respired air to 37°C and approximately 100% relative humidity are contingent upon the five determinants listed. The impact of a change in gas density is completely described in theory, listing changes in molar volume, heat capacity and gas flow characteristics, and how these changes might affect the heat and mass transfer between the respiratory mucosa and the respired air. Several semi-quantitative tables are given which permit a rough estimation of hourly or daily water loss from the respiratory tract for man under various conditions of ambient temperature and oxygen consumption.
dc.language.iso en-US
dc.publisher [Honolulu]
dc.relation Theses for the degree of Doctor of Philosophy (University of Hawaii (Honolulu)). Physiology; no. 124
dc.rights All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
dc.subject Water in the body
dc.subject Respiration
dc.title Water content of expired air in man
dc.type Thesis
dc.type.dcmi Text
Appears in Collections: Ph.D. - Physiology


Please email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.

Items in ScholarSpace are protected by copyright, with all rights reserved, unless otherwise indicated.