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Saline ingestion during lower body negative pressure as an end-of-mission countermeasure to post-space flight orthostatic intoleranceLower body negative pressure (LBNP) in conjunction with saline ingestion can protect astronauts against post-space flight orthostatic intolerance. LBNP was used for both treatment and testing. The treatment was 4 hours of lower body decompression at 30 mm Hg below ambient pressure. One liter of water and 8 g of salt were ingested during the first hour. The treatment was evaluated by comparing heart rate (HR) and blood pressure (BP) responses to test decompressions on the days before and after treatment. It is concluded that cardiovascular responses to step-wise decompression duplicated Skylab findings. BP was maintained, but HR responses to each step were progressively greater in-flight than preflight. After the 4-hour treatment HR responses were closer to preflight values.
Document ID
19920073081
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Charles, John B.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Jones, Michele M.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Fortney, Suzanne M.
(Space Biomedical Research Institute; Krug International Corp.; NASA, Johnson Space Center Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Subject Category
Aerospace Medicine
Report/Patent Number
IAF PAPER 92-0267
Accession Number
92A55705
Distribution Limits
Public
Copyright
Other

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