血浆置换联合连续性血液净化治疗儿童重症溶血尿毒综合征

目的：探讨床旁血浆置换（ plasma exchange，PE）联合连续性静-静脉血液滤过透析（ continuous veno-venous hemodiafiltration，CVVHDF）在抢救儿童重症溶血尿毒综合征（ hemolytic uremic syndrome，HUS）中的作用。方法总结本院PICU收治的HUS患儿的临床特点，采用儿童危重病例评分和儿童死亡危险评分Ⅲ评估病情的危重程度。对4例重症HUS患儿采用床旁PE联合CVVHDF治疗，观察病情演变与转归情况。结果2012年6月至2015年5月我院PICU收治重症HUS8例，经利尿剂、输血等保守治疗12～24 h后，病情加重的4例危重患儿进行PE＋CVVHDF序贯式血液净化治疗。 PE采用Prisma TPE 2000膜式血浆分离器，CVVHDF应用AN69 M60滤器，PE每次新鲜冰冻血浆50～70 ml／kg，连续3～6次，CVVHDF置换液50 ml／（ kg· h）。4例重症患儿治疗后均存活，血生化指标和肾功能指标改善。治疗前后血肌酐平均值（318μmol／L vs．162μmol／L）、乳酸脱氢酶（1963 U／L vs．407 U／L）明显下降，血小板计数明显升高（40×109／L vs．97×109／L）。结论 PE和CVVHDF治疗重症HUS，可以迅速改善患儿血生化指标，稳定内环境，阻断溶血和改善肾功能，可作为重症HUS抢救的重要手段。

Plasma exchange combined continuous veno-venous hemo diafiltration in the treatment of critical hemolytic uremic syndrome

Objective To investigta e the efficayc of bedside plasma exchange( PE) combined con-tinuous veno-venous hemodiafiltration ( CVVHDF ) in childer n with critical hemo lty ic uremic syndrome ( HUS) .Method s Eight patients with HUS from Pediatric Intensive Care Unit of Shanghai Ch ildren′s Hos-pitalw ere included in the present stuyd .The seveir ty of children was gar ded accordni g to peid atric critiac l ill-ness soc re and pediatric riks ofs core mortalityⅢ.Four of them received continuuo s blood purification treat-me nt.Meanwhile,the clinical manifestation and outcom e of HUS weer analyzed.Results Eight children with HUS weer ni itially trae ted with diuretic and blood transfusion for 12-24 hours.Four ac ses who deteriora-ted aggressively were ep rofr med PE and CVVHDF.Plasauto iQ21 and Prisma flex wereu sed with Pir sma TPE 2000 membrna e plasma separator and AN69 M60 membrane filter respectively.All the 4 patients with critical HUS survived after bedside continuous blood purification treatment.Clinical symptoms and serum bio-chemistry were improved sing ificantly as follows.The average levels of serum creatinine and lactate dehydro-genase decreased obviously(318μmol/L vs.162μmol/L;1 963 U/L vs.407 U/L,respectively).In addi-tion,platelet count increased significantly(40 ×109/L vs.97 ×109/L) .Eventually,symptoms disappeared in these 4 patients.Conclusion The combined therapy of PE and CVVHDF in HUS could stabilize fluid acid-base equilibrium,prevent hemolysis and improve the renal function.