Abstract Objective：To research the valve of ITBVI and EVLWI in fluid resuscitation of geriatric patients undergoing major chest trauma operation.Method：48 cases undergoing major chest trauma operation were included and randomly divided into two groups，24 cases in each group.The study group received pulse indicator continous output（PICCO） monitoring and ITBVI+EVLWI were used as indicator for fluid management.The control group was used central venous pressure（ CVP） as indicator for fluid management.Heart rate（ HR），mean arterial pressure（ MAP），central venous oxygen saturation（ ScvO2）
and lactic acid were compared.Postoperative shock improvement and oxygenation index，duration of mechanical ventilation，the incidence of acute pulmonary edema as well as mortality in these two groups were observed and compared.Result：The study group of tissue perfusion and shock were significantly improved than that of control group and oxygenation index increased，ScvO2 of the study group was higher than that of the control group，the concentration of lactic acid of the study group was lower than that of the control group，the incidency rate of acute pulmonary edema and mortality rate of the study group were lower than that of the control group，the differences were statistically significant（ P<0.05）.Conclusion：Compared with CVP，ITBVI and EVLWI data can
assess more accurately and guide fluid management in geriatric patients undergoing major chest trauma operation with less duration of mechanical ventilation，reduce the acute pulmonary edema，staying in ICU and mortality.
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