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A system to measure lower body volume changes during rapid onset high-G acceleration
L D Montgomery1, H M Hanish, J W Burns
1Harry G. Armstrong Aerospace Medical Research Laboratory, Wright-Patterson Air Force Base, Ohio.
Aviation, Space, and Environmental Medicine
|November 1, 1988
Summary
A new impedance plethysmograph measures body volume changes during centrifuge acceleration. This tool aids research into high-G environments and developing countermeasures for human performance enhancement.
Area of Science:
- Biomedical Engineering
- Human Physiology
- Aerospace Medicine
Background:
- Centrifuge acceleration studies are crucial for understanding human physiological responses to high-G environments.
- Measuring volumetric changes in the body is essential for assessing cardiovascular and fluid shifts during G-force exposure.
Purpose of the Study:
- To describe a specialized four-channel impedance plethysmograph for measuring volume changes in the calf, thigh, and abdomen.
- To demonstrate the instrument's application in research and the development of countermeasures for high-G environments.
Main Methods:
- Utilized a four-channel impedance plethysmograph to record volumetric data.
- Applied the device during rapid onset rate centrifuge acceleration.
- Collected data on calf, thigh, and abdominal volume changes.
Main Results:
- Presented typical results showcasing the device's functionality.
- Demonstrated the ability to measure significant volume changes during acceleration.
- Provided data applicable to human performance research in high-G conditions.
Conclusions:
- The described impedance plethysmograph is a valuable tool for studying physiological responses to G-force.
- The instrument aids in the design and assessment of countermeasures to improve human tolerance and performance in high-G environments.