Methods: we obtained the relationship between RBCdeformation index and RBC membrane viscosity in the process of RBCdeformation recovery.
方法：利用红细胞变形恢复过程，建立红细胞变形指数与红细胞膜粘度的关系。
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The main reasons of the increase in neonatal viscosity of blood are that hematocrit is higher, deformation of RBC is lower and aggregation of RBC is higher in newborn.