The application of positive pressure breathing for improving +Gz acceleration tolerance
Domaszuk, J.
Aviation Space and Environmental Medicine 54(4): 334-337
1983
ISSN/ISBN: 0095-6562 PMID: 6342597 Document Number: 215588
Investigations on +Gz acceleration tolerance were carried out in pilots using various values of positive pressure breathing (PPB) during centrifugation. The greatest improvement of +Gz tolerance--2.2 +Gz--was achieved while applying PPB=45 mm Hg and using a counterpressure suit. PPB prolonged the time at +5Gz from 2 min 35 s under control conditions to 6 min 53 s at PPB=45 mm Hg. The author discusses the mechanism of the increase in acceleration tolerance at PPB, stressing its protective effect on the circulatory system.