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Ventilatory Response to Passive Head Up Tilt

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Advances in Modeling and Control of Ventilation

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 450))

Abstract

Humans have several adaptive mechanisms to deal with the effect of gravity during upright postures. The effect of passive upright tilt (HUT) on respiration has been shown to reduce the end tidal partial pressure of carbon dioxide (PETCO2) and increase the end tidal partial pressure of oxygen (PETO2) (1,4,5,9,15–19). The typical 4 mmHg drop in PETCO2 has been shown to correspond with a decrease in arterial CO2 (PaCO2) of approximately 2 mmHg (1,5). McHenry et al. (17) found that PaCO2 decreased by ~1 mmHg during 30° HUT. Boutellier and coworkers (6) demonstrated that as subjects went from +1 Gz force to +2 and +3, PaCO2 continued to decrease.

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Author information

Authors and Affiliations

  1. Cerebral Blood Flow Lab, School of Kinesiology, University of Western Ontario, London, Ontario, N6A 3K7, Canada

    J. M. Serrador & R. L. Bondar

  2. Cardiorespiratory and Vascular Dynamics Lab, Department of Kinesiology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada

    R. L. Hughson

Authors
  1. J. M. Serrador
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  2. R. L. Bondar
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  3. R. L. Hughson
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Editor information

Editors and Affiliations

  1. University of Waterloo, Waterloo, Ontario, Canada

    Richard L. Hughson

  2. University of Western Ontario, London, Ontario, Canada

    David A. Cunningham

  3. University of Toronto, Toronto, Ontario, Canada

    James Duffin

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© 1998 Springer Science+Business Media New York

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Serrador, J.M., Bondar, R.L., Hughson, R.L. (1998). Ventilatory Response to Passive Head Up Tilt. In: Hughson, R.L., Cunningham, D.A., Duffin, J. (eds) Advances in Modeling and Control of Ventilation. Advances in Experimental Medicine and Biology, vol 450. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9077-1_22

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  • DOI: https://doi.org/10.1007/978-1-4757-9077-1_22

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4757-9079-5

  • Online ISBN: 978-1-4757-9077-1

  • eBook Packages: Springer Book Archive

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