hemotherapy for children with lymphoma: rituximab (375mg/m2 BSA) was added intravenously from COPADM1 regimen. once every 3 weeks to 4 weeks, combined with corresponding chemotherapy, a total of 4 times.~Rituximab (375mg/m2 BSA) was administered intravenously for lymphoproliferative diseases and Epstein-Barr(EB) virus-associated B lymphoproliferative diseases after hematopoietic stem cell transplantation. Once a week, a total of 4 times.~Primary immunologic thrombocytopenic purpura(ITP) and autoimmune hemolytic anemia(AIAH) patients received rituximab (100mg/m2 BSA) intravenously once a week, a total of 4 times.~The children were divided into group A and group B according to the disease type, and each group was randomly divided into two groups (group 1 and group 2) and assigned blood collection points.~Burkitt's lymphoma diffuse large B-cell lymphoma follicular lymphoma and other mature B-lymphomas were in group A. Hematopoietic stem cell transplantation, EPstein-Barr virus associated lymphocyte proliferative disease, lymphocyte proliferative change, primary immunologic thrombocytopenic purpura(ITP) and autoimmune hemolytic anemia(AIAH) were in group B.~Group 1: Children in the first group were collected 0, 12, 24, and 72 h after the first dose, 0h before and after the second dose, 0h before and after the third dose, 0h before and after the last dose, 48, and 96 h after the last dose. Venous blood was collected at 12 time points.~Group 2: Children in the second group were collected 0, 12, 48, and 96 h after the first dose, 0h before and after the second dose, 0h before and after the third dose, 0h before and after the last dose, 24, and 72 h after the last dose. Venous blood was collected at 12 time points.
To establish a population pharmacokinetic and pharmacodynamic model of rituximab in children with hemopathy. To optimize the administration of rituximab in the treatment of children based on pharmacokinetic model.