NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effects of 10 days 6 degrees head-down tilt on the responses to fluid loading and lower body negative pressureIn an international collaborative project six normal male subjects were studied before, during and after 10 days 6 degrees HDT. Fluid intake was controlled at 40 ml/(kgbw day). Urine volume and body weight were determined daily. Fluid loading and LBNP were performed in all three phases of the study. Body weight diminished by 2.6% because of fluid loss. Blood volume diminished by 13%. The responses to fluid loading were similar in the three phases of the study. Sixty minutes after end of infusion only 5.5% of the infused saline remained in the intravascular compartment. Excess interstitial fluid was eliminated in the next 24 hs but a negative balance was recorded also in the following day. The compliance of the lower limbs expressed as the rate of limb volume change/unit LBNP change was increased at the end of the HDT phase and during the post HDT phase. The set point of intravascular volume was defended, as shown by the response to FL. HDT increased the compliance of the lower limbs.
Document ID
20040112143
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Baisch, F.
(Institut fur Flugmedizin, Deutsche Forschungsanstalt fur Luft- und Raumfahrt, Koln, FRG)
Heer, M.
Beck, L.
Blomqvist, C. G.
Kropp, J.
Schulz, H.
Hillebrecht, A.
Meyer, M.
Date Acquired
August 21, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Acta astronautica
Volume: 23
ISSN: 0094-5765
Subject Category
Aerospace Medicine
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Number 00-00
NASA Discipline Cardiopulmonary
NASA Program Flight

Available Downloads

There are no available downloads for this record.
No Preview Available