Water content of expired air in man

Date

1967

Contributor

Advisor

Department

Instructor

Depositor

Speaker

Researcher

Consultant

Interviewer

Narrator

Transcriber

Annotator

Journal Title

Journal ISSN

Volume Title

Publisher

[Honolulu]

Volume

Number/Issue

Starting Page

Ending Page

Alternative Title

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.

Description

Typescript.
Thesis (Ph. D.)--University of Hawaii, 1967.
Bibliography: leaves 167-172.
vii, 172 l illus., tables

Keywords

Water in the body, Respiration

Citation

Extent

Format

Geographic Location

Time Period

Related To

Theses for the degree of Doctor of Philosophy (University of Hawaii (Honolulu)). Physiology; no. 124

Related To (URI)

Table of Contents

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.

Rights Holder

Local Contexts

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