目的 探讨血清水通道蛋白1（AQP1）水平联合血管外肺水指数（EVLWI）对脓毒症致急性呼吸窘迫综合征（ARDS）的病情程度及预后的评估价值。 方法 选取2020年1月至2023年12月收治的脓毒症致ARDS患者268例（ARDS组）和单纯脓毒症患者55例（单纯脓毒症组），脓毒症致ARDS患者根据氧合指数（OI）分为轻度组89例、中度组109例、重度组70例，根据28 d预后分为死亡组104例和存活组164例。检测血清AQP1水平和计算EVLWI。利用Spearman法，脓毒症致ARDS患者血清AQP1水平、EVLWI与OI的相关性；建立logistic回归模型，确定脓毒症致ARDS患者死亡的因素；并绘制ROC曲线，评价血清AQP1水平联合EVLWI对其的评估价值。 结果 与单纯脓毒症组比较，ARDS组血清AQP1水平降低，EVLWI升高（P < 0.05）。AQP1水平在轻度、中度、重度组中依次降低，EVLWI依次升高（P < 0.05）。血清AQP1水平与脓毒症致ARDS患者OI呈正相关，EVLWI与脓毒症致ARDS患者OI呈负相关（P < 0.05）。268例脓毒症致ARDS患者28 d死亡率38.81%（104/268）。脓毒症致ARDS患者死亡的独立保护因素为OI升高（OR= 0.984，95%CI：0.976 ~ 0.992）和AQP1升高（OR= 0.761，95%CI：0.677 ~ 0.854），独立危险因素为SOFA评分增加（OR= 1.367，95%CI：1.142 ~ 1.636）和血乳酸升高（OR= 2.515，95%CI：1.689 ~ 3.745）、EVLWI升高（OR= 1.559，95%CI：1.290 ~ 1.885），差异有统计学意义（P < 0.05）。血清AQP1水平联合EVLWI预测的AUC为0.887（95%CI：0.843 ~ 0.923），比血清AQP1水平、EVLWI单独预测的0.792（95%CI：0.738 ~ 0.839）、0.807（95%CI：0.754 ~ 0.852）大（P < 0.05）。 结论 血清AQP1水平降低和EVLWI升高与脓毒症致ARDS患者病情程度加重、预后不良有关，血清AQP1水平联合EVLWI对脓毒症致ARDS患者预后的评估价值较高。

Objective To investigate the value of serum aquaporin 1 （AQP1） level combined with extravascular lung water index （EVLWI） in assessing the severity and prognosis of sepsis causing acute respiratory distress syndrome （ARDS）. Methods 268 patients with sepsis-induced ARDS （ARDS group） and 55 patients with sepsis alone （sepsis alone group） admitted to our hospital from January 2020 to December 2023 were selected. Patients with sepsis-induced ARDS were divided into 89 mild， 109 moderate， and 70 severe groups according to the oxygenation index （OI）， and 104 deaths and 164 survivors according to the 28 d prognosis. Detection of serum AQP1 levels and calculation of EVLWI. Using Spearman's method， the correlation between serum AQP1 level， EVLWI and OI in patients with sepsis-induced ARDS； the establishment of a logistic regression model to determine the factors of sepsis-induced mortality in patients with ARDS； and the plotting of ROC curves to evaluate the value of serum AQP1 level in combination with EVLWI for its assessment. Results Compared with the simple sepsis group， serum AQP1 level was reduced and EVLWI was increased in the ARDS group （P < 0.05）. AQP1 levels were sequentially lower and EVLWI sequentially higher in the mild， moderate， and severe groups （P < 0.05）. Serum AQP1 levels were positively correlated with OI in patients with sepsis-induced ARDS， and EVLWI was negatively correlated with OI in patients with sepsis-induced ARDS （P < 0.05）. The 28 d mortality rate in 268 patients with ARDS due to sepsis was 38.81% （104/268）. The independent protective factors for death in ARDS patients with sepsis were elevated OI （OR= 0.984， 95%CI： 0.976 ~ 0.992） and elevated AQP1 （OR= 0.761， 95%CI： 0.677 ~ 0.854）， and the independent risk factors were increased SOFA score （OR= 1.367， 95%CI： 1.142 ~ 1.636） and elevated blood lactate （OR= 2.515， 95%CI： 1.689 ~ 3.745）， and elevated EVLWI （OR= 1.559， 95%CI： 1.290 ~ 1.885） （P < 0.05）. The AUC predicted by serum AQP1 level combined with EVLWI was 0.887 （95%CI： 0.843 ~ 0.923）， which was greater than the AUC predicted by serum AQP1 level， and EVLWI alone， which was 0.792 （95%CI： 0.738 ~ 0.839）， and 0.807 （95%CI： 0.754 ~ 0.852） （P < 0.05）. Conclusion Decreased serum AQP1 levels and elevated EVLWI were associated with increased severity and poor prognosis in patients with sepsis-induced ARDS， and serum AQP1 levels in combination with EVLWI were of high value in assessing the prognosis of patients with sepsis-induced ARDS.