床旁肺超声实时动态评估危重症患者肺炎病情严重程度的应用价值

Value of bedside pulmonary ultrasound in real-time dynamic evaluation of the severity of the pneumonia in critically ill patients

目的:探讨床旁肺超声实时动态评估危重症患者肺炎病情严重程度的应用价值。方法:选取我院135例危重症肺炎患者,根据急性生理与慢性健康评分Ⅱ(APACHEⅡ)分为低危组(45例)、中危组(50例)、高危组(40例),比较3组间肺超声评分(LUS)、氧合指数(OI)、肺泡-动脉氧分压差(A-aDO_(2))、临床肺部感染评分(CPIS)、序贯器官衰竭评分(SOFA);分析LUS与上述各指标间的相关性。根据临床结局分为死亡组(55例)和存活组(80例),比较两组间LUS的差异变化,采用ROC曲线评价LUS的临床诊断效能,并找出LUS预测危重症患者肺炎死亡的临床诊断分界值。结果:高危组LUS、A-aDO_(2)、CPIS及SOFA均高于中危组和低危组,而中危组均高于低危组;高危组OI则低于中危组和低危组,且中危组低于低危组,比较结果均差异有统计学意义(P<0.05)。LUS与A-aDO_(2)、CPIS及SOFA呈线性正相关(r=0.729,P<0.01;r=0.641,P<0.05;r=0.627,P<0.05);与OI呈显著线性负相关(r=-0.756,P<0.01)。死亡组LUS明显高于存活组,差异有显著统计学意义(P<0.01)。LUS预测危重症肺炎患者死亡的曲线下面积(AUC)为0.839,预测敏感度为78.2%,特异度为84.8%,LUS为21.5作为预测危重症患者肺炎死亡的临床诊断分界值。结论:床旁LUS与危重症患者肺炎病情严重程度存在相关性,可用于实时动态评估患者的病情及预后判断。

Objective:To explore the value of bedside pulmonary ultrasound in real-time dynamic evaluation of the severity of pneumonia in critically ill patients.Methods:One hundred and thirty five patients with severe pneumonia in our hospital were divided into low-risk group(45 cases),medium-risk group(50 cases)and high-risk group(40 cases)according to acute physiology and chronic health scoreⅡ(APACHEⅡ).Lung ultrasound score(LUS),oxygenation index(OI),alveolar-arterial oxygen differential pressure(A-aDO_(2)),clinical pulmonary infection score(CPIS)and sequential organ failure score(SOFA)were compared among the three groups;analyzing the correlation between LUS and the above indicators.According to the clinical outcome,patients were divided into death group(55 cases)and survival group(80 cases)with LUS compared the two groups were compared.The clinical diagnostic efficacy of LUS was evaluated by ROC curve,and the clinical diagnostic boundary value of LUS in predicting pneumonia death in critically ill patients was found.Results:LUS,A-aDO_(2),CPIS and SOFA in high-risk group were higher than those in other two groups,while those in medium-risk group were higher than those in low-risk group;the OI of high-risk group was lower than that of other two groups,and the OI of medium-risk group was lower than that of low-risk group(P<0.05).LUS was positively correlated with A-aDO_(2),CPISand SOFA(r=0.729,P<0.01;r=0.641,P<0.05;r=0.627,P<0.05)and negatively correlated with OI(r=-0.756,P<0.01).LUS in death group was significantly higher than that in survival group(P<0.01).The area under the curve(AUC)of LUS for predicting the death of critically ill patients with pneumonia was 0.839,with the prediction sensitivity and specificity of 78.2%and 84.8%respectively;and the LUS value was 21.5 as the clinical diagnostic boundary value for predicting the death of critically ill patients with pneumonia.Conclusion:Bedside LUS is correlated with the severity of pneumonia in critically ill patients,which can be used for real-time dynamic evaluation of patients’condition and prognosis.