1. Objective:To investigate the effect of exchange transfusion of homotypic blood via peripheral vessels on serum calcium.

2. Objective To investigate effects caused by total exchange transfusion on blood gas, electrolyte, and biochemistry metabolism in the neonate with septemia or hyperbilirubinemia.

3. Objective To study the effect of synchronous exchange transfusion in peripheral artery and vein in neonates.

4. Objective : To evaluate the therapeutic efficacy of synchronous exchange transfusion on hyperbilirubinemia.

5. Objective To explore effect and safety of all - autoed exchange transfusion controlled by infusion pump.

6. Objective To investigate the brain flood flow changes before and after exchange transfusion in neonatal polycythemia (NP).

7. According to the company's latest announcement, the company's independent directors will also carry out exchange transfusion.

8. Objectives To analyze the correlation factors and intervention strategies for anemia after exchange transfusion in neonates.

9. Conclusion: Hemoglobin concentration of low level, low reticulocyte counts and exchange transfusion before phototherapy may correlate to failure of phototherapy.