J Korean Soc Emerg Med.
2013 Feb;24(1):129-130.
Mathematical Explanation for the Wide and Deviated Range of Optimal Hematocrit
- Affiliations
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- 1Department of Emergency Medicine, Kangwon National University Hospital, Chuncheon, Korea.
- 2Department of Internal Medicine, Kangwon National University College of Medicine, Chuncheon, Korea. wsoh@kangwon.ac.kr
Abstract
- Hematocrit is an important determinant of oxygen delivery. Of particular interest, its target level is very wide for different kinds of shock: from 30% for hemorrhagic or septic shock to 56% for secondary polycythemia. This range is not only wide but also deviated to the higher level from the optimal value of 40%. In this letter, the authors determine the mathematical basis of the wide and deviated range of hematocrit starting from the Hagen-Poisseuille equation.
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