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目的:探讨动脉血乳酸对婴幼儿重症肺炎预后评价中的价值.方法:回顾性分析该院2010～2013年婴幼儿重症肺炎160例和同期住院婴幼儿普通肺炎156例,于入院初、入院6h、入院24h、入院48 h抽动脉血化验乳酸进行比较,并计算6h乳酸清除率.结果:入院时重症肺炎组血乳酸(3.90±1.25) mmol/L,高于普通肺炎组(1.75 ±0.55) mmol/L,P＜0.05.重症肺炎组6h后乳酸清除率(4.21±3.25) mmol/L,明显低于普通肺炎组(13.21±4.51) mmol/L,P＜0.01.结论:动态监测血乳酸,尤其6h血乳酸清除率对判断婴幼儿重症肺炎的预后有较高的价值.“,”Objective:To explore the value of arterial blood lactic acid in prognosis evaluation of infantile severe pneumonia.Methods:A total of 160 infants with severe pneumonia and 156 infants with common pneumonia during the same period in the hospital were analyzed retrospectively.Arterial blood specimens were abstracted on admission,at 6,24,and 48 hours after admission to detect and compare lactic acid levels,the clearance rate of lactic acid at 6 hours after admission was calculated.Results:On admission,lactic acid level in severe pneumonia group was (3.90 ± 1.25) mmol/L,which was statistically significantly higher than that in common pneumonia group [(1.75±0.55) mmol/L] (P＜0.05).The clearance rate of lactic acid at 6 hours after admission in severe pneumonia group was (4.21±3.25) mmol/L,which was statistically significantly lower than that in common pneumonia group [(13.21±4.51) mmol/L] (P＜0.01).Conclusion:Dynamic nonitoring arterial blood lactic acid,especially the clearance rate of lactic acid at 6 hours after admission,has high value in predicting the prognosis of infantile severe pneumonia.