摘要目的 探讨中心静脉压(CVP)评估感染性休克患者容量反应性的作用.方法 对入选的66例感染性休克患者行容量负荷试验,以提高患者CVP 2 mm Hg(1mm Hg=0.133 kPa)为目标,心脏指数(CI)≥300 ml·min-1·m-2为有反应者(有反应组),CI<300 ml·min-1·m-2为无反应者(无反应组).CVP由上腔静脉导管测量,全心舒张末容积指数(CEDVI)、胸腔内血容量指数(ITBVI)、每搏输出量指数(SVI)、CI经肺热稀释法和脉搏指示连续心排血量技术(PiCCO)测量.结果 (1)初始CVP有反应组明显低于无反应组,初始CVP用于诊断容量反应性有意义(P<0.05),其中CVP=11 mill Hg时敏感度为0.884,特异度为0.601.(2)有反应组与无反应组比较,初始ITBVI、GEDVI、CI、收缩压、舒张压、平均动脉压、心率差异无统计学意义.容量负荷试验前后,有反应组与无反应组比较,△ITBVI、△GEDVI、△CI、△SVI差异有统计学意义,△ITBVI、△GEDVI用于诊断容量反应性有意义.(3)CVP≤11 mm Hg者与CVP>11 mm Hg者比较,初始ITBVI、GEDVI差异无统计学意义.容量负荷试验前后,CVP≤11 mm Hg者与CVP>11 mm Hg者比较,△ITBVI、△GEDVI差异有统计学意义.结论 (1)用CVP评估感染性休克患者容量反应性有指导意义,但CVP >11 mm Hg时患者对容量负荷试验有反应的可能性较小;(2)与CVP相比,初始ITBVI、GEDVI评估感染性休克患者容量反应性无明确优势,当CVP无法良好预测容量反应性时△ITBVI、△GEDVI有指导意义.

abstractsObjective To investigate the clinical role of central venous pressure(CVP) to evaluate fluid responsiveness in septic shock patients. Methods 66 septic shock patients were studied, every patient was administered a volume challenge, before and after it, CVP, intrathoracic blood volume index (ITBVI),global end-diastolic volume index(GEDVI), cardiac index(CI), stroke volume index(SVI) were measured by PiCCO method. All the obtained values were analyzed by statistics method. Results Initial CVP in responders is significantly different from that in nonresponders; △ITBVI, △GEDVI, △CI, △SVI, △HR (△:changes) before and after volume challenge in responders were significantly different from those in nonresponders; the significance of △ITBVI, AGEDVI to predict volume responsiveness was strong indicated by high values of areas under the receiver operating characteristic curves (0.674 and 0.700, respectively).If patients were regrouped by CVP≤11 mm Hg(1 mm Hg=0.133 kPa) and CVP > 11 mm Hg, initial ITBVI and GEDVI in responders were not significantly different from that in nonresponders; △ITBVI,△GEDVI, △CI, △SVI before and after volume challenge in responders were significantly different from those in nom'esponders. Conclusion In septic shock patients, CVP play a guidance role to predict and evaluate volume responsiveness and when CVP was > 11 nun Hg, a positive response will be less likely. Initial volumetric parameters(intrathoracic blood volume and global end-diastolic volume) play a questionable role in predicting and evaluating volume responsiveness, changes before and after volume challenge maybe helpful.