Journal article
Synchronized External Pulsation for Improved Tolerance to Acceleration Stress: Model Studies and Preliminary Experiments
IEEE transactions on biomedical engineering, v BME-32(2), pp 158-165
Feb 1985
PMID: 3997171
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Synchronized external pulsation is proposed as a method to improve tolerance to acceleration stress. This technique uses a modified anti-G suit which is pressurized and depressurized synchronously with the heart cycle. The feasibility of the procedure has been studied using a computer model of the cardiovascular system which includes the effects of Gz stress, and contains simulations of baroreceptor control of heart rate and venous tone. Model predictions indicate that for unprotected subjects, carotid pressure at eye level (ophthalmic artery pressure) decreases to 20 mmHg (beginning of central light loss) at approximately +3.6 Gz. Applying standard anti-G suit pressure to the model increases this level to 5.3 Gz. When synchronized external pulsation of 2 psi is superimposed on the standard anti-G suit pressure, the tolerance to acceleration stress is further augmented by at least 0.9 G above the protection afforded by the standard anti-G suit alone. A set of preliminary experiments on human subjects to test the feasibility of using the technique in the high-G environment has also been carried out. The results under various protection modes compare favorably to the model predictions. Our results suggest that the computer model presented here is a useful tool for studying cardiovascular responses under +GZ stress. It also indicates that using synchronized external pulsation pressure superimposed on the standard anti-G suit pressure may offer extra protection to acceleration stress.
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Details
- Title
- Synchronized External Pulsation for Improved Tolerance to Acceleration Stress: Model Studies and Preliminary Experiments
- Creators
- Thomas W Moore - Drexel UniversityDov Jaron - Drexel UniversityChia-Lin Chu - Drexel UniversityUri Dinnar - Technion – Israel Institute of TechnologyLeonid Hrebien - AIRMichael J White - Michigan State UniversityEdwin Hendler - Naval Air Development CenterStephen Dubin - Drexel University
- Publication Details
- IEEE transactions on biomedical engineering, v BME-32(2), pp 158-165
- Publisher
- IEEE
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering; School of Biomedical Engineering, Science, and Health Systems; [Retired Faculty]
- Web of Science ID
- WOS:A1985ADS5900009
- Scopus ID
- 2-s2.0-0021892153
- Other Identifier
- 991019173465504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Biomedical