Accession Number : AD0488786

Title :   THE EFFECT OF DECREASED BAROMETRIC PRESSURE ON MAXIMUM PRESSURE-VOLUME RELATIONSHIPS OF THE HUMAN RESPIRATORY SYSTEM.

Descriptive Note : Technical documentary rept.,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Personal Author(s) : Johnson, Louis F., Jr

Report Date : JUL 1963

Pagination or Media Count : 9

Abstract : In this study, maximum expiratory and inspiratory pressures and the resulting lung-volume changes were simultaneously recorded at ground level (approximately 747 mm. Hg) and at 30,000-feet-pressure altitude (225 mm. Hg). For given pulmonary pressures, lung-volume changes were greater at 30,000 feet than at ground level. The area of the maximum pressure-volume diagram at 30,000 feet was 79% of the area of the same diagram at ground level. (Author)

Descriptors :   *RESPIRATION), (*LUNG, (*RESPIRATION, HIGH ALTITUDE), PRESSURE, RESPIRATORY SYSTEM, BAROMETRIC PRESSURE, HUMANS, PHYSIOLOGY, VOLUME, OXYGEN CONSUMPTION, MEASUREMENT, LOW ALTITUDE.

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE