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Objective measurement of human tolerance to +G sub z acceleration stressThe efficacy of a new objective technique using a transcutaneous Doppler flowmeter to monitor superficial temporal artery blood flow velocity during acceleration was investigated. The results were correlated with current objective and subjective G tolerance end points. In over 1300 centrifuge runs, retrograde eye level blood flow leading to total flow cessation was consistently recorded and preceded visual field deterioration leading to blackout by 3 to 23 seconds. The new method was successfully applied as an objective indication of tolerance in a variety of test situations including evaluation of g-suits, straining maneuvers, and 13 deg, 45 deg and 65 deg set back angles.
Document ID
19800010433
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Rositano, S. A. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 4, 2013
Publication Date
February 1, 1980
Subject Category
Aerospace Medicine
Report/Patent Number
A-8059
NASA-TM-81166
Accession Number
80N18709
Funding Number(s)
PROJECT: RTOP 199-01-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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