Correlation of Eye-Level Blood Flow Velocity and Blood Pressure During +GZ Acceleration
Abstract
Eye-level blood flow and blood pressure changes were correlated on the USAFSAM human centrifuge during both rapid onset (ROR, 1G/sec) and gradual onset runs (GOR, 0.1 G/sec). A transcutaneous Doppler ultrasonic flowmeter was used to monitor temporal artery blood flow (Qta); direct blood pressure was obtained by cannulation of a radial artery and measured at eye level with a Statham P-37 miniature transducer. Eye-level mean blood pressure (Pa) decreased to 20 mm Hg and zero forward Qta occurred 6 sec (range 4-9 sec) prior to blackout in experienced centrifuge subjects during RORs. The same degree of correlation was not seen during GORs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1973
- Accession Number
- AD0770560
Entities
People
- R. E. Mancini
- Robert W. Krutz Jr.
- S. A. Rositano
Organizations
- United States Air Force School of Aerospace Medicine