N-末端B-型钠尿肽前体在ICU非心源性重症患者预后判断中的应用价值

摘要

目的：探讨氨基末端B型钠尿肽前体（ NT-pro-BNP）是否是ICU非心源性重症患者预后判断的独立危险因素。方法采用前瞻性研究方法，选择综合ICU非心源性患者152例，进入ICU后完善患者基本资料，记录患者年龄、性别、APACHEⅡ评分等。于收治1、2、5 d进行NT-proBNP检测，记录患者28 d的终点事件。结果152例入选患者28 d死亡率40§．13％（61／152）。死亡组血浆NT-pro-BNP第1天浓度和APACHE Ⅱ评分明显高于存活组（ P ＜0．05），NT-pro-BNP与APACHE Ⅱ有相关性，且均为影响患者28 d死亡率的独立危险因素，二者的敏感性、特异性ROC曲线比较，NT-pro-BNP ROC曲线下面积为0．731，APACHEⅡ评分ROC曲线下面积为0．716，在评估患者预后比较中 NT-pro-BNP 优于 APACHE Ⅱ，但差异无统计学意义（ P ＞0．05）。血浆 NT-pro-BNP 最佳临界值为5003．39 pg／ml，NTp-ro-BNP＜5003 pg／ml组生存率高于NT-pro-BNP ＞5003 pg／ml组（χ2＝32．1， P ＜0．01）。结论ICU非心源性重症患者NT-pro-BNP＞5003 pg／ml是判断预后的独立危险因素。%Objective To investigate whether plasma N-terminal pro-B-type natriuretic peptide (NT-pro-BNP) is an independent risk factor for noncardiac severe patients in intensive care unit ( ICU ) .Methods A prospective observational study was performed in which 152 noncardiac severe patients in ICU were enrolled .The patients ’ age, sex, basic data, APACHEⅡscores were collected,the patients’ NT-pro-BNP levels were detected at day 1,2,5 after admission to ICU and 28-day mortality was recorded.Results The 28-day mortality of the patients was 39.8%(61/152).The plasma NT-pro-BNP levels (pg/ml) and APACHE Ⅱscore in death group were significantly higher than those in survival group ( P <0.05) at the first day of admission to ICU.There was a correlation between plasma NT-pro-BNP levels and APACHE II score,moreover, which was independent risk factor of influencing 28-day mortality of noncardiac severe patients in ICU .The area under receiver operating characteristic curve ( ROC curve) of NT-pro-BNP and APACHE Ⅱ score were 0.731 and 0.714,respectively. NT-pro-BNP was better than APACHE Ⅱ in evaluating patients ’ prognosis , however , there was no significant difference between them ( P >0.05).The optimized critical value of plasma NT-pro-BNP was 5 003.39pg/ml,furthermore,the survival rate in NT-pro-BNP<5 003pg/ml group was significantly higher than that NT-proB-NP>5 003pg/ml group (χ2=32.1, P<0.01).Conclusion The NT-pro-BNP>5 003pg/ml of noncardiac severe patients in ICU is an independent risk factor in evaluating patients’ prognosis.