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目的:探讨西维来司钠对烟雾吸入性肺损伤大鼠早期炎症反应、肺水肿发生率的影响。方法:选取75只SD大鼠，随机分为对照组、模型组、低剂量组、中剂量组及高剂量组，每组15只。除对照组外对其他大鼠进行烟雾吸入建模，并在建模后分别给予生理盐水、西维来司钠10 mg/kg、20 mg/kg及30 mg/kg腹腔注射，24 h后观察其一般情况及肺组织情况。结果:与对照组大鼠相比，各组大鼠均存在一定程度的肺损伤、肺泡间壁增厚、肺泡间质充血等情况，且模型组大鼠肺泡间隔厚度、肺组织湿干比重(W/D)水平、肺水肿发生率及TNF-α、IL-6、中性粒细胞弹性蛋白酶(NE)、髓过氧化物酶(MPO)水平均显著高于其他4组，高、中、低剂量组中，以低剂量组大鼠肺功能恢复水平最高，其肺泡间隔厚度、肺组织W/D水平、肺水肿发生率分别为(6.76±0.40)μm、(5.18±0.13)及40.00%，其TNF-α、IL-6、NE及MPO水平分别为(19.62±0.83)pg/L、(9.41±0.25)pg/L、(6.23±0.18)μg/L及(30.64±0.87)pg/L，显著优于中剂量组及高剂量组(n P<0.05)。n 结论:西维来司钠对烟雾吸入性肺损伤能够产生显著干预效果，可提升其肺功能恢复水平，降低肺脏出现的炎症反应及肺水肿等症状发生，其治疗效果与给药剂量存在关联，就大鼠而言，给药剂量为10 mg/kg治疗效果最佳。“,”Objective:To investigate the effects of sivelestat sodium on early inflammatory response and pulmonary edema in rats with smoke inhalation-induced lung injury.Methods:Seventy-five Sprague-Dawley rats were randomly divided into control group, model group, low-dose group, middle-dose group and high-dose group. The smoke inhalation model was continued except for the control group. The rats were given intraperitoneal injection of normal saline, cevicell sodium 10 mg/kg, 20 mg/kg and 30 mg/kg. The general condition and lung tissue were observed after 24 hours.Results:Compared with the control group, rats in each group had a certain degree of lung injury, alveolar wall thickening, alveolar interstitial hyperemia, etc. The alveolar septal thickness, lung tissue wet-dry (W/D) level, the incidence of edema and the levels of tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), neutrophil elastase (NE) and myeloperoxidase (MPO) in the model group were significantly higher than those of the other 4 groups. The lung function recovery was highest in the low dose group and the alveolar septal thickness was the highest among the dose group. The alveolar wall thickening incidence of W/D level and pulmonary edema in lung tissue in the low dose group were (6.76±0.40)μm, (5.18±0.13) and 40.00%, respectively, and the levels of TNF-α, IL-6, NE and MPO were (19.62±0.83)pg/L, (9.41±0.25)pg/L, (6.23±0.18)μg/L and (30.64±0.87)pg/L, significantly better than the middle dose group and high dose group (n P<0.05).n Conclusions:Sivelestat sodium can significantly affect the smoke inhalation lung injury, and improve the recovery of liver function, which can significantly reduce the incidence of inflammation and pulmonary ede-ma in the lung, but its therapeutic effect and drug delivery. There was a significant association between doses and therapeutic effect, in the case of rats, a dose of 10 mg/kg was the best for treatment.