摘要目的 探讨血流动力学监测预测新生儿脓毒症休克液体复苏反应性的价值.方法 选择2014年3月至2017年5月华中科技大学同济医学院附属武汉儿童医院及附属同济医院新生儿重症监护病房收治的脓毒症休克患儿进行回顾性研究,所有入选患儿均在液体复苏治疗前及治疗后1h、6h应用无创多普勒超声心排量监测仪进行血流动力学监测,包括心输出量指数、外周循环阻力指数、每搏输出量、每搏量变异度(stroke volume variation,SVV)、每搏输出量指数(stroke volume index,SVI)和校正流动时间(corrected flow time,FTc等.根据液体治疗前后SVI计算SVI变化率(△SVI),△SVI≥10％为反应组,△SVI＜10％为无反应组.分析两组患儿血流动力学指标的差异及相关性,评估SVV和FTc在液体复苏治疗反应性诊断中的预测价值.结果 共纳入96例患儿,其中对液体治疗有反应54例,无反应42例.(1)反应组和无反应组治疗前FTc分别为(317.1±22.2)ms、(326.8±21.2)ms,SVV分别为(18.3±2.0)％、(15.0±2.6)％,差异均有统计学意义(P＜0.05);SVV和△SVI成正相关(r=0.542,P＜0.05).(2)反应组和无反应组治疗后心率、平均动脉压、心输出量、心输出量指数、每搏输出量、外周循环阻力指数均改善,治疗后1h、6h与治疗前比较、治疗后6h与1h比较,差异均有统计学意义(P＜0.05).(3)SVV的受试者工作特征曲线下面积为0.838(95％CI 0.749～0.906);当SVV为15.5％时,其预测液体复苏治疗反应性的灵敏度为98.2％,特异度为73.8％,优于FTc(曲线下面积0.642,95％CI 0.538～0.737).结论 SVV可以预测新生儿脓毒症休克患儿液体复苏治疗的反应性,可作为临床诊断的依据.

abstractsObjective To study the predictive value of hemodynamic monitoring in the responsiveness of fluid therapy in neonatal septic shock.Method The 96 neonates with septic shock admitted to the NICU from Wuhan Children's Hospital and Tongji Hospital between March 2014 to May 2017 were enrolled.Hemodynamics parameters of neonates pre-,1 hour and 6 hour post-fluid therapy were supervised by ultrasonic cardiac output monitor.The hemodynamics parameters included cardiac index (CI),systemic vascular resistance (SVR),stroke volume (SV),stroke volume variation (SVV),stroke volume index (SVI) and corrected flow time (FTc).The SVI variation (△ SVI) were calculated based on the SVI among pre-and post-fluid therapy.According to the △ SVI,these samples were assigned into two groups,responsive group with a △ SVI ≥10％,and the other was nonresponsive group respectively.T-test was applied to analyze the differences of hemodynamic parameters between two groups.The associations between SVV、FTc and △ SVI were evaluated by bivariate correlation.Receiver operating characteristic curve (ROC) was used to evaluate the predictive value of SVV and FTc in fluid responsiveness.All statistical analyses were performed by SPSS 19.0,P＜0.05 was considered as statistically significant.Result A total of 96 cases were enrolled,of which 54 were fluid responsive group,while 42 were nonresponsive group.(1) Before fluid resuscitation,the FTc in responsive and nonresponsive groups were (317.1±22.2) ms and (326.8± 21.2) ms (P＜0.05) respectively,SVV were(18.3±2.0)％ and (15.0±2.6)％ (P＜0.05).SVV was significantly associated with △ SVI (r=0.542,P＜0.05).(2) There were statistically significant differences in heart rate,mean arterial pressure,cardiac output,cardiac index,stroke volume and systemic vascular resistance index before treatment,1 h and 6 h after treatment (P＜0.05).(3) The area under the ROC of SVV (AUC) was 0.838 (95％CI 0.749～0.906).A sensitivity of 98.2％,and specificity 73.8％ when SVV defined as 15.5％,with a significant difference when compared with FTc (AUC=0.642,95％CI 0.538～0.737) (P＜0.01).Conclusion SVV could be a reliable predictive index in estimating fluid responsiveness of neonatal septic shock and could be helpful parameter in clinic diagnosis.