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目的:探讨降钙素原在早期诊断重症肺炎的程度及预后的意义.方法:回顾性分析近两年来我院治疗的68例重症肺炎的患者,与入院后的第1、3、5天分别对所有的患者进行降钙素原(PCT)和白细胞计数(WBC)检测,根据其预后情况将本组患者分为存活组和死亡组,对比两组患者的PCT和WBC的检测结果.结果:死亡12例,存活56例;死亡组第3、5天及死亡前PCT的检测结果明显高于存活组(P0.05);死亡组第5天及死亡或者转出前的WBC水平明显高于存活组(P<0.05).结论:动态检测血清PCT的水平,还可以协助判断重症肺炎的预后.“,” Objective :To discuss the significance of PCT in early diagnosis of degree and prognosis of severe pneumonia. Methods :68 cases of severe pneumorua were detected PCT and WBC l、3 、5 after being adnutted into hospital and divided into survival group and death group according to prognosis. PCT and WBC results of both groups were compared. Results :12 cases died, 56 survived. The PCT of death group on 3rd、5th day and before death were obviously higher than survival group (P0. 05);WBC of 5th day and after death of death group was obviously higher than survival group ( P<0.05) . Conclusion :Dynanuc detection of PCT can help in estimate the prognosis of severe pneumonia.