Theoretical concepts hold that blood in the gravity dependent portion of the body would relocate to more cephalad compartments under microgravity. The result is an increase in blood volume in the thoraic and cardiac chambers. However, experimental data has been somewhat contradictory and nonconclusive. Early studies of peripheral venous pressure and estimates of central venous pressure (CVP) from these data did not show an increase in CVP under microgravity. However, CVP recorded in human volunteers during a parabolic flight revealed an increase in CVP during the microgravity state. On the STS 40 shuttle mission, a payload specialist wore a fluid line that recorded CVP during the first few hours of orbital insertion. These data revealed decreased CVP. When this CVP catheter was tested during parabolic flight in four subjects, two had increased CVP recordings and two had decreased CVP measurements. In 1991, our laboratory performed parabolic flight studies in several chronic-instrumented baboons. It was again noted that centrally recorded right atrial pressure varied with exposure to microgravity, some animals having an increase, and others a decrease.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Circulatory filling pressures during transient microgravity induced by parabolic flight


    Beteiligte:
    Latham, Ricky D. (Autor:in) / Fanton, John W. (Autor:in) / White, C. D. (Autor:in) / Vernalis, Mariana N. (Autor:in) / Crisman, R. P. (Autor:in) / Koenig, S. C. (Autor:in)


    Erscheinungsdatum :

    1993-02-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Circulatory Filling Pressures During Transient Microgravity Induced by Parabolic Flight

    R. D. Latham / J. W. Fanton / C. D. White et al. | NTIS | 1993


    Perception of depth in microgravity during parabolic flight

    Clément, Gilles | Online Contents | 2008


    Perception of depth in microgravity during parabolic flight

    Clément, Gilles | Online Contents | 2008


    Perception of depth in microgravity during parabolic flight

    Clément, Gilles / Lathan, Corinna / Lockerd, Anna | Elsevier | 2008


    Perception of depth in microgravity during parabolic flight

    Clement, G. / Lathan, C. / Lockerd, A. et al. | British Library Conference Proceedings | 2008