Respiratory Heat Exchange with Varying Temperature and Humidity of Inspired Air
Year: 1951
Type: article
Abstract: I N THE COURSE 01 ~ STUDIES on human exposures to air temperatures ranging up to 240’F. (115.5Oc.) and humidities ranging up to 1.4 in. Hg (35.6 mm.) vapor pressure, the possibility of intolerable heating of the respiratory passages or lungs as a limiting factor had continuously been entertained. Actually under the conditions of the experiments this fear was not realized, and all symptoms specifically referable to the respiratory tract proved to be mild and without important effect upon the duration of the experiment. It became clear that, like sweat evaporation in its effect upon the skin, the evaporative cooling mechanism of the respiratory tract has great capacity to absorb sensible heat through humidification. A few preliminary measurements made in 1948 typically took the following temperature course: 0 I showed that ambient air at 220’F. ncJusuREMENT Inhalation: At portal of nose or mouth 1.5 in. within nose or mouth Exhalation:
Source: Journal of Applied Physiology
Authors: Joseph W. McCutchan, Craig L. Taylor
Language: English
Subfield: Physiology (medical)
Field: Medicine
Domain: Health Sciences
Open Access status: green
Funder: U.S. Air Force
OpenAlex ID: W1767796411