Human Plasma Steroid and Electrolyte Concentrations between 0800 and 1600 Hours
SCHOOL OF AVIATION MEDICINE RANDOLPH AFB TX
Pagination or Media Count:
The purpose of the present study was to determine whether or not significant changes would occur in plasma steroid and electrolyte levels as a consequence of a 4-hour sampling procedure. Two venous blood samples were collected from each of 460 healthy young adult males, with a 4-hour interval between samplings. There was no consistent change in total 17-hydroxycorticoid levels between 0800 and 1600 hours. Very small yet statistically significant increases in plasma sodium were found following the 4-hour periods between samples. Potassium concentration increased in three of the five time groups, only two of these increases being significant.
- Anatomy and Physiology