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Basic factors determining the hemorheological disorders in the microcirculation.

George McHedlishvili1

  • 1Microcirculation Research Center, I. Beritashvili Institute of Physiology, Tbilisi, Georgia. geomched.micce@caucasus.net

Clinical Hemorheology and Microcirculation
|July 20, 2004
PubMed
Summary

Blood flow in capillaries depends on blood structure, not just fluid dynamics. Key factors include red blood cell aggregation, deformability, hematocrit, and plasma viscosity, impacting microcirculation health.

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Area of Science:

  • Physiology
  • Biomedical Engineering
  • Microcirculation Research

Background:

  • Blood behaves uniquely in microcirculation due to cellular components (red and white blood cells) comparable in size to vessel lumens.
  • Traditional hydrodynamic principles are less applicable to capillary blood flow, necessitating a focus on hemorheological properties.

Purpose of the Study:

  • To identify the primary determinants of blood flow resistance within the microcirculation.
  • To elucidate the specific hemorheological factors governing blood advancement in capillaries, arterioles, and venules.

Main Methods:

  • Analysis of perennial investigations and research on hemorheological disorders in microvessels.
  • Specification of principal factors influencing blood flow resistance based on observational data.

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Main Results:

  • Blood flow in capillaries is predominantly governed by the "structure" of flowing blood, not solely hydrodynamic relationships.
  • Identified key factors determining microcirculatory resistance: erythrocyte aggregability, erythrocyte deformability, local hematocrit, and blood plasma viscosity.

Conclusions:

  • Understanding these hemorheological factors is crucial for addressing microcirculatory disorders.
  • These findings have significant implications for the theory and treatment of diseases like stroke, heart attack, diabetes, hypertension, and cancer.