Objective:To explore the effect of Vancomycin on immune hemolysis and coagulation in children with non-Hodgkin′s lymphoma (NHL), thus providing the basis for the diagnosis and treatment of hemolytic anemia and coagulation dysfunction caused by Vancomycin, and guiding the rational use of drugs in children with NHL.Methods:From January 2018 to January 2019, 31 children with NHL treated with monotherapy of Vancomycin in Beijing Children′s Hospital, Capital Medical University were collected.Plasma samples within 1 week of Vancomycin medication were collected for detecting the anti-Vancomycin antibody by microcolumn gel method.The laboratory diagnostic and coagulation function indexes of hemolytic anemia before and after Vancomycin medication were analyzed using the paired sample t test. Results:Fourteen out of 31 children with NHL were positive for the anti-Vancomycin antibody, and among them, 10 cases had positive direct antiglobulin test (DAT). In NHL children with positive anti-Vancomycin antibody, their red blood cell count (RBC)[(2.75±0.07)×10 12/L vs.(3.18±0.07)×10 12/L], platelet count (PLT)[64.29±14.87)×10 9/L vs.(91.36±16.84)×10 9/L] and hematocrit (HCT)[(23.02±0.83)% vs.(29.19±1.98)%] were significantly reduced after Vancomycin medication than those before treatment (all P<0.01). On the contrary, total bilirubin (TB) [(51.96±15.52) μmol/L vs.(39.34±13.40) μmol/L], direct bilirubin (DB)[(31.30±13.98) μmol/L vs.(26.38±12.61) μmol/L], indirect bilirubin (IB)[(21.81±2.89) μmol/L vs.(13.75±1.63) μmol/L] and lactate dehydrogenase (LDH)[(208.6±16.85) U/L vs.(60.93±16.00) U/L] in them were significantly enhanced after Vancomycin medication than those before treatment (all P<0.05). Prothrombin time (PT)[(13.94±0.58) s vs.(11.66±0.30) s] and partial thromboplastin time (APTT)[(36.01±2.64) s vs.(28.09±0.98) s] were significantly prolonged in them after vancomycin medication than those before treatment (all P<0.01). A higher international normalized ratio (INR)(1.25±0.05 vs.1.05±0.02) was detected in NHL children with positive anti-Vancomycin antibody after medication ( P<0.000 1). In NHL children with negative anti-Vancomycin antibody, significantly higher PT (12.99±0.35) s vs.(11.82±0.27) s and INR (1.18±0.03 vs.1.07±0.03) were detected after Vancomycin medication (all P<0.000 1), while other indexes were similar before and after treatment. Conclusions:The anti-Vancomycin antibody may cause immune hemolysis and coagulation dysfunction in children with NHL.In order to prevent serious adverse events caused by drug antibodies, comprehensively clinical symptoms should be considered, drug antibodies and laboratory test results should be detected.

【Objective】 To evaluate the coagulation function of children with Kasabach-Merritt syndrome(KMS)by thromboelastography (TEG) and conventional coagulation tests (CCTs), and to explore the correlation and consistency of the 2 test methods. 【Methods】 A total of 49 children with KMS, submitted to our hospital from January 2016 to December 2020, were enrolled. The TEG, CCTs data and platelet count were analyzed to evaluate the coagulation function, and the superiority of the 2 test methods were compared by Spearman correlation and Kappa consistency analysis. 【Results】 TEG and CCTs showed that the coagulation reaction time(R) was normal, the counts and function of platelet and fibrinogen decreased, and the D-dimer increased. The coagulation complex index (CI) indicated that the whole coagulation function was low. There was no significant difference in coagulation by sex or age in KMS children. The correlation analysis of TEG and CCTs in the coagulation function of KMS children showed that R was correlated with prothrombin time (PT) and activated partial thromboplastin Time(APTT), respectively (P<0.01); Fib had weak correlation with clot formation time (k)(r²=0.33), but strongly correlated with α-angle and MA value(r²=0.7, 0.69), respectively (P<0.01). PLT was moderately correlated with MA(r²=0.49, P<0.05); D-dimer had no correlation with LY30. Comparision resu lts of the consistency of TEG and CCTs showed that FIB and MA had consistency ( kappa=1, P<0.01); None or weak consistency was noticed among other indicators, R with PT/APTT, the kappa was 0.18 and 0.19; Fib with K/α-Angle, the kappa was 0.28 and 0.34; D-dimer with LY30, the kappa was 0.01; PLT with MA, the kappa was 0.35. 【Conclusion】 The main manifestations in low coagulation function in children with KMS were mainly thrombocytopenia, lower fibrinogen, and increased fibrinogen degradation-products, and the coagulation factors were normal. Except for Fib and MA, the consistency of other indexes in the detection of coagulation function in children with KMS by TEG and CCT is weak. Some indexes are significantly correlated but others not. Therefore, the 2 test methods are irreplaceable and should be combined to reduce the risk of embolism and bleeding in children.