Microcirculation
In medicine, microcirculation describes the blood flow in the smallest blood vessels with a diameter of less than 100 micrometers (for example capillaries , arterioles , venules ), the so-called microvessels. The microcirculation establishes the connection between the arterial and the venous system and brings the blood into the immediate vicinity of the cells , so that the remaining distance is small enough for the exchange of substances by diffusion ; It also enables cells to pass from the blood into the tissue, such as immune cells in the event of inflammation . Within the blood vessel system , the microcirculation is the section with the largest overall diameter and consequently the lowest flow velocity.
Circulatory disorders of the microcirculation can be found, for example, in diabetes mellitus , scleroderma , hyperviscosity syndrome , leukemia , malaria or sepsis . The coronary artery disease , the stroke and peripheral arterial occlusive disease , however, are examples of circulatory disorders by the constriction or blockage afferent arterial vessels.
literature
- Horst Rieger, W. Schoop: Clinical Angiology . Springer, Berlin / Heidelberg / New York 1998, ISBN 3-662-08105-9 .
Individual evidence
- ^ Matthias F. Schneider, SW Schneider: The von Willebrand factor: an intelligent vascular glue . In: BIOspectrum . Volume 14, No. 2 . Spectrum, 2008, ISSN 0947-0867 , p. 134-139 .
- ↑ microcirculation. In: Vascular Diagnostics. Medical clinic with a focus on cardiology and angiology at the Charité - Universitätsmedizin Berlin. On Herz.Charite.de, accessed on September 12, 2019.