RESUMO
Objective To analyze the haemorheological related index changes in Han population in plain who returned from plat-eau about 45 d .Methods Venous blood of Han popuktion whe returned from plateau about 45 d and who stay in plain was collected for haemorheological related index detection .Results In males of Han population who returned to plains from plateau had a re-markable rising in HCT ,erythrocyte rigidity index and the whole blood viscosity of low shear rate (P0 .05) .Conclusion In males ,the plateau re-turned to plains Han population after returned to plain about 45 d ,most indexes of blood rheology can recover to the level of the people who stay in plain .In females ,all indexes of blood rheology can recover to the level of people who stay in plain .