HEAT INDUCED HYPERVENTILATION AND THE PROTECTIVE MASK
Final rept. Jul 1964-Jun 1965
INDIANA UNIV AT BLOOMINGTON DEPT OF ANATOMY AND PHYSIOLOGY
Pagination or Media Count:
The impairment in the performance of men wearing the protective clothing was determined by measuring the respiratory and thermal responses of the subjects walking on a treadmill at 3 mph, zero grade at 21 and 40 C and 10 mm Hg vapor pressure. The major cause of the discomfort was found to be thermo- regulatory in nature. The M6 hood added considerably to the heat stress of the subjects. Similarly, as compared to subjects with the heads kept uncovered, wearing the M-17 protective mask also resulted in greater discomfort in the heat. Since a high body temperature seems to be essential for a rise in ventilation, further experiments need to be carried out to determine whether in subjects working in the heat, wearing mask and hood after the attainment of a rectal temperature of 39 C or more results in hyperventilation. The subjects in this series reported severe thermal discomfort prior to the attainment of any hyperventilation with only one exception.
- Protective Equipment