Free 17-OHCS Levels in Parotid Fluid as Indicators of Hyperthermic Stress.
AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OHIO
Pagination or Media Count:
Physiologic parameters of rectal, skin, and body temperatures, body heat storage, heart rate, and parotid fluid 17-OHCS levels were obtained on human subjects during one hour hyperthermic exposures at 52C and 66C ambient air temperatures. Significant differences were noted between control and exposure values in all parameters except parotid fluid 17-OHCS where elevated responses correlated with duration and degree of thermal stress, reaching maximal values after 50 and 60 minutes of exposure. In the 17-OHCS response, fluctuations were observed for both the 66C and 52C exposures with primary peak elevations for each occurring at 20 minutes exposure and secondary peak elevations at 50 and 60 minutes, respectively. The parotid fluid corticosteroid level, with its shifting between normal and elevated values, is an unpredictable barometer of physiologic strain induced by heat stress. Author
- Stress Physiology