每搏量变异评价顽固性感染性休克患者容量反应性

Stroke volume variation in the evaluation of fluid responsiveness in refractory septic shock

目的 评价每搏量变异（SVV）能否作为机械通气的顽固性感染性休克患者容量反应性指标.方法 对收治于北京协和医院加强医疗科的42例顽固性感染性休克患者进行容量负荷试验,比较容量负荷试验有反应者和无反应者间SVV的差异,通过受试者工作特征（ROC）曲线确定SVV判断容量反应性的阈值.结果 （1）42例患者中24例患者容量负荷试验有反应,18例患者无反应.（2）容量负荷试验前有反应者和无反应者间中心静脉压、心率、平均动脉压、全心舒张末容积指数差异无统计学意义,有反应者和无反应者间SVV差异有统计学意义（17.7±7.1比9.6±4.1,P=0.006）.（3）以SVV≥12%评价顽固性感染性休克患者容量反应性,灵敏度为77%,特异度为85%.结论 SVV可作为顽固性感染性休克患者容量反应性指标.

Objective To evaluate fluid responsiveness by stroke volume variation （SVV） in mechanically ventilated patients with refractory septic shock.Methods Forty-two refractory septic shock patients were enrolled in the study.According to the responsiveness of fluid loading, the patients were divided into responsive group and non-responsive group.The SVV values of two groups were retrospectively analyzed.The receiver operating characteristic curve was drafted to determine the cut-off value of SVV for predicting fluid responsiveness.Results Among the 42 refractory septic shock patients, 24 were found responsive to fluid loading, 18 were not;before the fluid loading, central venous pressure, heart rate, mean arterial pressure and global end-diastolic volume index in the both groups showed no significant differences whereas the SVV in the responsive group was much higher than that in the nonresponsive group （P =0.006）.Using SVV ≥ 12% as the threshold to predict fluid responsiveness, the sensitivity was 77%,specificity was 85%.Conclusion SVV can accurately predict fluid responsiveness in refractory septic shock patients.