Real-time assessment of global and regional lung ventilation in the anti-gravity straining maneuver using electrical impedance tomography

Anti-gravity straining maneuver (AGSM) helps to reduce the occurrence of gravity-induced visual disturbances and loss consciousness. An objective assessment AGSM is still missing during ground training. This study evaluated feasibility using electrical impedance tomography (EIT) assess performance AGSM. Eight undergraduates eight teachers majoring in aerospace medicine were included study. experienced professor from department reviewed key points with each subject. EIT measurement was performed The global regional ventilation used investigate characteristics subjects rated according requirements (maximum 16 points) before after reviewing ventilations EIT. For ventilation, relative depth gas exchange duration exhalation larger than those students (p < 0.01), stability better as well 0.001). No difference leakage between found. had significantly increased ventral implementation 0.001) whereas did otherwise. Additionally, differences rating scores without also significant. Significant reductions found assessed by (4.5 ± 2.0, p themselves (3.9 2.2, systematically higher when compared professor's 0.001 for both EIT). These findings demonstrated that could objectively characterize details AGSM, which might provide a potential tool real-time quality an manner.