Résumé
Objective: To investigate the clinical value of peripheral blood neutrophil to lymphocyte ratio ( NLR) in patients with acute respiratory distress syndrome, and to compare the role of NLR and procalcitonin ( PCT) in the prognosis of patients with acute respiratory distress syndrome. Methods: From October 2015 to December 2017, 79 cases of ARDS patients were selected as case group, and 79 health examination persons were also selected as control group. According to the situation of death in 28 days of the ARDS patients were divided into survival group ( 38 cases) and death group ( 41 cases). The peripheral blood white blood cell count ( WBC), neutrophils count ( NC), lymphocyte count ( LC) and serum PCT level were detected, and calculate NLR. The clinical value of NLR and PCT in patients with acute respiratory distress syndrome ( NLR) were evaluated by receiver operating characteristic curve ( ROC) and the area under the curve ( AUC). The Kaplan-Merier method was used to analyze survival rate of patients with ARDS. Results: The levels of WBC, NC, NLR and PCT in ARDS patients were significantly higher than those of the control group ( P＜ 0. 05), while the level of LC was significantly lower than that of the control group ( P＜0. 05). The level of NLR and PCT in the survival group were significantly lower than those in the death group ( P＜0. 05). The AUC of NLR and PCT for evaluating the prognosis of ARDS patients were 0. 786 and0. 689 respectively. With Kaplan-Meier analysis of survival curves, ARDS patients whose NLR ≥13. 80 and PCT ≥ 4. 01 μg/L had lower 28 day survival rate as compared with those with NLR＜13. 80 and PCT＜4. 01 μg/L ( P＜0. 001). Conclusion: The NLR and PCT could be used as biomarkers for evaluating the prognosis of ARDS patients, but the effect of NLR is better than that of PCT.