+Gz protection of a new bladder anti-G system.
OBJECTIVE
A new bladder anti-G system was developed to get better +Gz protection. The purpose of this study was to assess the +Gz protection afforded by it on the centrifuge.


METHODS
Six male subjects using the new bladder anti-G system were exposed to 10-15 s ladder-shaped +Gz profiles without anti-G straining maneuver (AGSM), then exposed to + 5-9 Gz simulated aerial combat maneuver (SACM) with leg straining.


RESULTS
The +Gz protection and the +Gz-time tolerance were obtained. The anti-G effectiveness of the advanced bladder system was 5.33 +/- 0.26 G. All subjects passed the +5-9 Gz SACM, but the effort and fatigue were lower.


CONCLUSIONS
The +Gz protection afforded by this system is high. The suggested scheme of the new bladder anti-G system is feasible.
Institute of Aviation Medicine, The Air Force, Beijing, China.
Xi-chen
XC
Gen
Gui-ding
GD
Yan
Zhao
Z
Jin
Yan
Y
Xu
Hong
H
Wang
Li-hua
LH
Li
D000293:Adolescent; D000328:Adult; D000337:Aerospace Medicine; D001359:Aviation / Q000295:instrumentation; D002498:Centrifugation; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D005221:Fatigue / Q000209:etiology / Q000517:prevention & control*; D005676:Gravity Suits; D006801:Humans; D018471:Hypergravity / Q000009:adverse effects*; D008297:Male; D010807:Physical Endurance / Q000502:physiology*