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脉搏指示连续心输出量监测（ PiCCO）技术是一项经肺温度热稀释和动脉脉搏轮廓分析联合应用的新技术，近年来逐渐广泛应用于重症患者，尤其是感染性休克患者的血流动力学监测。与传统容量监测指标中心静脉压相比，其容量性指标胸腔内血容积指数、血管外肺水指数能更准确、可靠地反映患者的容量状态，从而实施精细、优化的液体管理，在改善感染性休克患者氧合、缩短机械通气时间、降低病死率方面展现出优势。“,”The pulse indicator continuous cardiac output ( PiCCO) device is a new technique, integra-ting a wide array of both static and dynamic haemodynamic data through a combination of trans-cardiopulm-onary thermodilution and pulse contour analysis.In recent years,PiCCO is widely used in the hemodynamic monitoring of critically ill patients especially those with septic shock .Compared with the traditional preload parameter central venous pressure ( CVP) ,the preload parameters of PiCCO as intrathoracic blood volume in-dex ( ITBVI ) and extravascular lung water index ( EVLWI ) can provide more accurate and reliable assessment of preload,and offer an appropriate and optimal management of fluid resuscitation for the patients . PiCCO have the advantages of improving oxygenation,shortening the duration of mechanical ventilation,and reducing the fatality rate.