TPO-RAs Combining Anti-CD 20 Monoclonal Antibody Versus TPO-RAs in the Management of Pediatric Primary Immune Thrombocytopenia (ITP)

Inclusion criteria

• ✓. Age 6-17 years old (including both ends), male and female;
• ✓. Patients aged 6-11 years (including values at both ends) were diagnosed with chronic ITP, and patients aged 12-17 years (including values at both ends) were diagnosed with persistent or chronic ITP, with platelet counts less than 20×109/L;
• ✓. Patients did not respond to glucocorticoid therapy or relapsed. Previous ITP treatment may include, but is not limited to, glucocorticoids, immunomodulators (IVIG), azathioprine, danazole, cyclophosphamide and immunomodulators.
• ✓. Treatment for ITP (including but not limited to glucocorticoids, recombinant human thrombopoietin, TPO agonist (TPO-RA), azathioprine, danazole, cyclosporin A, mycophenate) must be completed or dose stabilized before enrollment, and therapeutic dose should not be increased after enrollment (e.g. The glucocorticoid dose should be stable for ≥14 days and the immunosuppressant dose should be stable for \> 3 months before the first administration of the study drug. TPO drugs should be stopped \> 1 month, TPO-RA drugs should be stopped \> 1 month).
• ✓. No infectious fever (including but not limited to lung infection) in the past 1 month.
• ✓. Laboratory examination of coagulation function should show that the prothrombin time (PT) and activated partial thrombin time (aPTT) values did not exceed 20% of the normal laboratory value range; No history of abnormal coagulation except for ITP.
• ✓. WBC count, neutrophil absolute value and hemoglobin should be within the normal range of laboratory values. No other abnormality except for ITP. Other exceptions except the following:
• ✓. Understand the study procedure and voluntarily sign the informed consent.

Exclusion criteria