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Journal of The Korean Society of Emergency Medicine 2013;24(1): 129-130. |
| Mathematical Explanation for the Wide and Deviated Range of Optimal Hematocrit |
| Sung Bin Chon, Jun Hwi Cho, Seung Joon Lee, Won Sup Oh |
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 |
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| ABSTRACT |
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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. |
| Key words:
Hematocrit, Hemoglobin, Oxygen, Polycythemia, Shock |
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