1. Associations have been shown between low packed cell volume or red cell volume, or both, and the respiratory distress syndrome.

2. Packed cell volume was measured in the first arterial or venous blood sample obtained, usually when establishing arterial access.

3. First day packed cell volume also emerged as a predictor of transfusion requirements.

4. The content of hemoglobin, number of erythrocytes, packed cell volume, and the number of reticulocytes were increased markedly. The living quality was improved.

5. For those not requiring red cell transfusion there was no difference in packed cell volume between the groups at 1 month.

6. Objective To observe the levels of blood viscosity, Plasma Viscosity, Packed cell volume, blood sedimentation and erythrocyte electrophoresis of umbilical blood in 100 newborns.

7. Comparing the results of hemorheology tests between Wenxin granule and its control medicine by blood viscosity, erythrocyte sedimentation rate (ESR) packed cell volume, etc.