the characteristic of physiological index during repeatedly posture changes test
- Paper number
IAC-08.A1.2.17
- Author
Dr. wu ping, China
- Year
2008
- Abstract
Abstract Objective To investigate the characteristic of physiological index during repeatedly posture changes test, as well as the discrepancy of these index in different groups. To find some sensitive index for evaluation. To provide a theoretical basis to formulate Astronaut Selection Standard of Blood Redistribution Adaptability. Method 53 male subjects were exposed to a tilt test of repeatedly posture changes. The tilt changes followed this way : 0 degree 5min,-15 degree 1.5min,50 degree 1min,15 degree 1.5min,50 degree 1min,-15 degree 1.5min,50 degree 1min, -30 degree 2min,50 degree 1min,-30 degree 2min,50 degree 1min,-30 degree 2min,50 degree 1min,-45 degree 3min,50 degree 1min ,-45 degree 3min,50 degree 1min,-30 degree 2min , 50 degree 1min.The running angular velocity was about 15 degree per second.To observe the objective and subjective reaction during the test,as well as the characteristic of cardiovascular index and ECG. Result There might be some specific arrhythmia such as supraventricular tachycardia and atrioventricular block. According to the response to the test, these subjects were divided into 2 groups named “adaptation” and “reaction”. The different tendencies of cardiovascular index of the two groups had been summarized. ECG and the equation of HR,DBP and MBP between HUT and HDT could be used as the sensitive index for evaluation. Conclusion This study indicates that the repeatedly posture change test, which would be used for selection of astronaut and pilot, is profit to discriminate and find the sensitive individuality which would appear some serious ECG changes such as supraventricular tachycardia and atrioventricular block in a specific circumstance. And the sensitive index can be used for the evaluation of this test.
- Abstract document
- Manuscript document
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