Accession Number:

ADA030315

Title:

Respiratory Heat Loss and Pulmonary Function during Cold-Gas Breathing at High Pressures.

Descriptive Note:

Medical research progress rept.,

Corporate Author:

NAVAL MEDICAL RESEARCH INST BETHESDA MD

Report Date:

1976-01-01

Pagination or Media Count:

18.0

Abstract:

In deep diving, significant heat loss through the lungs--both in warming and in humidifying the inspired cold gas--occurs due to the increased thermal capacity of the breathing-gas mixture. Other factors which increase respiratory heat loss RHL are a decrease in inspired gas temperature T1 and an increase in respiratory minute volume VE. The purpose of this study was to measure RHL in two divers at rest and at four graded levels of exercise while breathing cold gas at simulated depths to 1000 feet of sea water fsw. A secondary purpose was to study cardiopulmonary function and to investigate the possibility of pulmonary damage from dense, cold gas acting directly on the respiratory tract mucosa.

Subject Categories:

  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE