Accession Number:

AD0755783

Title:

Red Blood Cell Density and Volume Changes in Men Exposed to Hypobaric Hyperoxia

Descriptive Note:

Interim rept. 1 Jul 1970-15 Dec 1971

Corporate Author:

SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX

Report Date:

1972-12-01

Pagination or Media Count:

15.0

Abstract:

Eight volunteers were exposed to 100 O2 at 258 mm. Hg for 31 days. Blood samples were taken daily, and red cell RBC volume distributions were determined by Coulter counter--RBC density distributions, by the method of Danon and Marikovsky. RBC volume distribution varied in a cyclic fashion but exhibited no consistent, significant changes. After 4 to 6 days in the test environment, the RBC populations showed an increase in the proportion of dense cells and a trend of increasing senescence was evident for the remainder of the exposure period. Postexposure changes indicated the formation of new red cells.

Subject Categories:

  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE