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Increase in whole-body peripheral vascular resistance during three hours of air or oxygen prebreathingMale and female subjects prebreathed air or 100% oxygen through a mask for 3.0 hours while comfortably reclined. Blood pressures, heart rate, and cardiac output were collected before and after the prebreathe. Peripheral vascular resistance (PVR) was calculated from these parameters and increased by 29% during oxygen prebreathing and 15% during air prebreathing. The oxygen contributed substantially to the increase in PVR. Diastolic blood pressure increased by 18% during the oxygen prebreathe while stystolic blood pressure showed no change under either procedure. The increase in PVR during air prebreathing was attributed to procedural stress common to air and oxygen prebreathing.
Document ID
19840022615
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Waligora, J. M.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Horrigan, D. J., Jr.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Conkin, J.
(Technology Inc.)
Dierlam, J. J.
(Technology Inc.)
Stanford, J., Jr.
(Technology Inc.)
Riddle, J. R.
(Technology Inc.)
Date Acquired
September 4, 2013
Publication Date
August 1, 1984
Subject Category
Aerospace Medicine
Report/Patent Number
NAS 1.15:58261
S-537
NASA-TM-58261
Accession Number
84N30684
Funding Number(s)
CONTRACT_GRANT: NAS9-17200
PROJECT: RTOP 199-99-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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