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Resistance

  • Nicolaas Westerhof
  • Nikolaos Stergiopulos
  • Mark I. M. Noble
Chapter

Abstarct

Poiseuille’s law (Chap. 2) shows that resistance depends on the length and diameter of the vessel and the viscosity of blood. However, even for a single blood vessel, it is difficult to derive the relation between pressure and flow on the basis of Poiseuille’s law. The diameter of the vessel needs to be accurately known because of the fourth power law. Furthermore, the vessel should be uniform, and, especially for small vessels, the anomalous viscous properties of blood make it impossible to use a single number for viscosity. Accurate calculation of resistance on the basis of Poiseuille’s law is therefore virtually impossible. However, resistance can be calculated from the ratio of the pressure gradient and flow constituting a practical experimental approach. Thus although Poiseuille’s law makes it possible to arrive at several important conclusions regarding vascular function, in practice we use resistance, calculated using Ohm’s law.

Keywords

Peripheral Resistance Total Resistance Conduit Artery Total Pressure Drop Arteriolar Resistance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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    Van den Berg BM, Vink H, Spaan JAE. The endothelial glycocalyx protects against myocardial edema. Circ Res 2003;92:592–594.PubMedCrossRefGoogle Scholar
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    Berne RM, Levy MN, Koeppen BM, Stanton BA. Physiology. 2003, St Louis & Baltimore, Mosby-Elsevier, 5th edn.Google Scholar

Copyright information

© Springer US 2010

Authors and Affiliations

  • Nicolaas Westerhof
    • 1
  • Nikolaos Stergiopulos
    • 2
  • Mark I. M. Noble
    • 3
  1. 1.Departments of Physiology and Pulmonology ICaR-VUVU University Medical CenterAmsterdamthe Netherlands
  2. 2.Laboratory of Hemodynamics and Cardiovascular TechnologySwiss Federal Institute of TechnologyLausanneSwitzerland
  3. 3.Cardiovascular MedicineAberdeen UniversityAberdeenScotland

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