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Internal Jugular Vein Volume During Head-Down Tilt and Carbon Dioxide Exposure in the SPACECOT Study

Marshall-Goebel, K. and Stevens, B. and Rao, C.V. and Suarez, J.I. and Calvillo, E. and Arbeille, P. and Sangi-Haghpeykar, H. and Donoviel, D. and Mulder, E. and Bershad, E.M. (2018) Internal Jugular Vein Volume During Head-Down Tilt and Carbon Dioxide Exposure in the SPACECOT Study. Aerospace Medicine and Human Performance, 89 (4), pp. 351-356. Aerospace Medical Association. DOI: 10.3357/AMHP.4934.2018 ISBN 29562964 ISSN 2375-6314

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Abstract

BACKGROUND: Cerebral hemodynamics and venous outflow from the brain may be altered during exposure to microgravity or head-down tilt (HDT), an analog of microgravity, as well as by increased ambient CO2 exposure as experienced on the International Space Station. METHODS: Six healthy subjects underwent baseline tilt table testing at 0°, 6°, 12°, 18°, 24°, and 30° HDT. The right internal jugular (IJ) vein cross-sectional area (CSA) was measured at four intervals from the submandibular to the clavicular level and IJ volume was calculated. Further measurements of the IJ vein were made after ∼26 h of 12° HDT bed rest with either ambient air or 0.5% CO2 exposure, and plasma and blood volume were assessed after 4 h, 24 h, and 28.5 h HDT. RESULTS: IJ vein CSA and volume increased with progressively steeper HDT angles during baseline tilt table testing, with more prominent filling of the IJ vein at levels closer to the clavicle. Exposure to 26 h of 12° HDT bed rest with or without increased CO2, however, had little additional effect on the IJ vein. Further, bed rest resulted in a decrease in plasma volume and blood volume, although changes did not depend on atmospheric conditioning or correlate directly with changes in IJ vein CSA or volume. DISCUSSION: The hydrostatic effects of HDT can be clearly determined through measurement of the IJ vein CSA and volume; however, IJ vein dimensions may not be a reliable indicator of systemic fluid status during bed rest.Marshall-Goebel K, Stevens B, Rao CV, Suarez JI, Calvillo E, Arbeille P, Sangi-Haghpeykar H, Donoviel DB, Mulder E, Bershad EM, the SPACECOT Investigators Group. Internal jugular vein volume during head-down tilt and carbon dioxide exposure in the SPACECOT Study.

Item URL in elib:https://elib.dlr.de/119592/
Document Type:Article
Title:Internal Jugular Vein Volume During Head-Down Tilt and Carbon Dioxide Exposure in the SPACECOT Study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Marshall-Goebel, K.german aerospace center (dlr)https://orcid.org/0000-0002-5240-7625
Stevens, B.UNSPECIFIEDUNSPECIFIED
Rao, C.V.UNSPECIFIEDUNSPECIFIED
Suarez, J.I.UNSPECIFIEDUNSPECIFIED
Calvillo, E.UNSPECIFIEDUNSPECIFIED
Arbeille, P.Université Francois Rabelais, Tours, FranceUNSPECIFIED
Sangi-Haghpeykar, H.UNSPECIFIEDUNSPECIFIED
Donoviel, D.Baylor College of MedicineUNSPECIFIED
Mulder, E.German Aerospace Center (DLR), Institute of Aerospace Medicine, Space Physiology, Cologne, GermanyUNSPECIFIED
Bershad, E.M.Baylor College of MedicineUNSPECIFIED
Date:1 April 2018
Journal or Publication Title:Aerospace Medicine and Human Performance
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:89
DOI :10.3357/AMHP.4934.2018
Page Range:pp. 351-356
Publisher:Aerospace Medical Association
ISSN:2375-6314
ISBN:29562964
Status:Published
Keywords:Cerebral hemodynamics; head-down tilt; carbon dioxide exposure;
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Systemphysiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Cardiovascular Medicine in Aerospace
Institute of Aerospace Medicine > Muscle and Bone Metabolism
Deposited By: Polak, Agnieszka
Deposited On:12 Apr 2018 10:46
Last Modified:12 Apr 2018 10:46

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