肢体远隔缺血预处理减轻单肺通气时患者的肺损伤

目的 探讨远隔缺血预处理(RIPC)对全身麻醉下开胸手术患者单肺通气(OLV)时肺损伤的影响.方法 择期行开胸食管癌根治术患者80例,采用随机数字表法分为2组(n=40):对照组(C组)和肢体RIPC组(RIPC组).于OLV即刻(T1)、30 min(T2)、1 h(T3)、2 h(T4)时采集桡动脉血样行血气分析,计算氧合指数(OI)、呼吸指数(RI)和PaO2/PAO2,采用酶联免疫吸附法测定血浆TNF-α、IL-1β和IL-10的水平,收集呼出气冷凝液,测定pH值.结果 与C组比较,RIPC组T2～T4时OI升高,RI降低,PaO2/PAO2升高,T3～T4时,血浆TNF-α和IL-1β水平降低,呼出气冷凝液pH值升高,T4时血浆IL-10水平升高(P＜0.05).结论 RIPC可抑制开胸手术患者OLV时的炎性反应,减轻气道酸化,从而减轻肺损伤.

Limb remote ischemic preconditioning attenuates lung injury in patients during one-lung ventilation

Objective To investigate the effect of remote ischemic preconditioning (RIPC) on the lung injury during one-lung ventilation (OLV) in the patients undergoing thoracic surgery.Methods Eighty patients scheduled for elective radical operation for esophageal cancer,were randomly divided into 2 groups (n=40 each) using a random number table.control group (group C) and group RIPC.At 0 (T1),30 min (T2),1 h (T3) and 2 h (T4) of OLV,blood samples were obtained from the radial artery for blood gas analysis and determination of plasma concentrations of tumor necrosis factor-α (TNF-α),interleukin-1β (IL-1ββ) and IL-10.Oxygenation index(OI),respiratory index(RI) and PaO2/PAO2 were calculated.Exhaled breath condensate was collected and the pH value was measured.Results Compared with group C,Oxygenation index was significantly increased,and respiratory index was decreased at T2-T4,the plasma concentrations of TNF-α and IL-1β were decreased,and the pH value of exhaled breath condensate was increased at T3-T4,and the plasma concentration of IL-10 was increased at T4 in group RIPC.Conclusion RIPC can inhibit inflammatory responses and reduce airway acidification,thus attenuating the lung injury during OLV in the patients undergoing thoracic surgery.