Objective  To explore the effect of passive leg lifting combined with non-invasive hemodynamic monitoring in postoperative fluid management of patients.

  Methods  A total of 80 postoperative patients with thoracic and abdominal surgeries were selected and were randomly divided into observation group(n=40) and control group(n=40). The observation group was given passive leg lifting combined with non-invasive hemodynamic monitoring, while the control group was given routine fluid treatment. The levels of lactic acid (Lac) were recorded before and 6, 24, 48 and 72 h after treatment in two groups. Heart rate (HR), mean arterial pressure (MAP), central venous pressure (CVP) and serum creatinine (Scr) levels were compared between the two groups 3 days after surgery, and the advantages and disadvantages of the two fluid treatment schemes were evaluated.

  Results  The lactic acid levels of 6 and 24 h after treatment in the observation group were significantly lower than those of the control group (P < 0.05). Lac levels in the two groups before treatment and at 48 and 72 h showed no significant differences (P>0.05). After 72 h of treatment, the MAP level of the observation group was significantly higher than that of the control group, and HR, CVP and Scr were significantly lower than those of the control group (P < 0.05).

  Conclusion  Passive leg lifting combined with noninvasive hemodynamic monitoring can reduce the incidence of prerenal acute renal injury and shorten the duration of hyperlactic acidemia in postoperative fluid management, its advantage is better than conventional method.