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Pflügers Archiv

, Volume 307, Issue 1, pp 22–28 | Cite as

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

  • Juro Iriuchijima
  • Hiroyuki Koike
  • Kojiro Matsuda
Article

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.

Key-Words

Regional Flow Cardiac Output Blood Pressure Reflex Flow Resistance Cardiovascular Regulation 

Schlüsselwörter

Lokale Durchblutung Herzminutenvolumen Blutdruckreflex Stromresistenz Kreislaufregulation 

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References

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Copyright information

© Springer-Verlag 1969

Authors and Affiliations

  • Juro Iriuchijima
    • 1
    • 2
  • Hiroyuki Koike
    • 1
    • 2
  • Kojiro Matsuda
    • 1
    • 2
  1. 1.Institute for Medical Electronics, Faculty of MedicineUniversity of TokyoTokyoJapan
  2. 2.Department of Physiology, Faculty of MedicineUniversity of TokyoTokyoJapan

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