What causes peripheral blood flow abnormalities in sepsis/septic shock?

Updated: Oct 07, 2020
  • Author: Andre Kalil, MD, MPH; Chief Editor: Michael R Pinsky, MD, CM, Dr(HC), FCCP, FAPS, MCCM  more...
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Answer

The peripheral blood flow abnormalities result from the balance between local regulation of arterial tone and the activity of central mechanisms (eg, the autonomic nervous system). Regional regulation and the release of vasodilating substances (eg, NO and prostacyclin) and vasoconstricting substances (eg, endothelin) affect regional blood flow. Increased systemic microvascular permeability also develops, remote from the infectious focus, and contributes to edema of various organs (eg, the lung microcirculation) and to the development of ARDS.


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