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Indices for the role played by regional flow resistance in blood pressure reflex

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Summary

An index, α = (Δr/r)/(ΔR/R), is proposed for assessment of the relative degree of participation of a regional flow resistance in a blood pressure reflex, wherer andR are regional and total peripheral resistances respectively and Δ's refer to their reflexive changes. For actual computation, α =I (iΔP − PΔi)/i(IΔP − PΔI), whereI=cardiac output,i=regional flow rate,P=mean arterial pressure. When the change in cardiac output is neglegible, the above equation is simplified as Δ=1 − PΔi/iΔP. Another index,β = Δg/ΔG = (PΔi − iΔP)/(PΔI − IΔP), is introduced for the degree of contribution of a region to a reflex, whereg andG are regional and total conductances.αi = β1. Some examples of application of the indices are presented.

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Author notes

  1. Hiroyuki Koike

    Present address: Central Research Laboratories, Sankyo Co. Ltd, Tokyo, Japan

Authors and Affiliations

  1. Institute for Medical Electronics, Faculty of Medicine, University of Tokyo, Tokyo, Japan

    Juro Iriuchijima, Hiroyuki Koike & Kojiro Matsuda

  2. Department of Physiology, Faculty of Medicine, University of Tokyo, Tokyo, Japan

    Juro Iriuchijima, Hiroyuki Koike & Kojiro Matsuda

Authors
  1. Juro Iriuchijima
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  2. Hiroyuki Koike
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  3. Kojiro Matsuda
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Supported in part by a grant from the Ministry of Education of Japan.

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Iriuchijima, J., Koike, H. & Matsuda, K. Indices for the role played by regional flow resistance in blood pressure reflex. Pflugers Arch. 307, 22–28 (1969). https://doi.org/10.1007/BF00589456

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  • DOI: https://doi.org/10.1007/BF00589456

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