Use of Lower Body Negative Pressure as a Countermeasure to Negative Gz Acceleration
Abstract
Lower body negative pressure (LBNP) was used at levels of 0, -50, and -100 torr as a countermeasure prior to centrifuge exposures of subjects to negative Gz at levels of -1.0, -1.5, and -2.0. EKG, echocardiographic, and subjective data were gathered. Physiological variables for end diastolic volume (EDV), end systolic volume (ESV), stroke volume (SV), heart rate (HR), and cardiac output (CO) were obtained at baseline values, then percent of baseline after LBNP was started, then during the -Gz exposure plateau. ANOVA revealed that the LBNP main effects were significant for EDV, ESV, SV, and HR. The negative Gz main effects were not significant for EDV, ESV, & SV but were significant for HR and CO.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 10, 1989
- Accession Number
- ADA231616
Entities
People
- Bradley G. Beck
- Lloyd D. Tripp Jr.
Organizations
- Wright State University