To explore the level of HBV DNA after plasma exchange (PE) in patients with severe hepatitis and its prognoses.Randomized 60 patients who were infected with hepatitis B virus and suffering from severe hepatitis.20 cases were treated with only basic medical therapy as control group, while 40 cases treated with PE on the basic medical therapy as treatment group.It showed that the level of serum HBV DNA was decreased after PE therapy.The level of serum HBV DNA was significantly decreased in recovering patients comparing with the worse patients and the control group.The PE therapy could effectively eliminate the serum HBV DNA in patients with severe hepatitis and improve the liver function and prognoses.Then the survival rate of patients increased.
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