IL-6、TNF-α及sICAM-1在婴幼儿体外循环肺损伤中的表达及超滤干预效果
- 摘要:
- 目的探讨婴幼儿体外循环术后肺损伤机理及改良超滤对肺功能的保护作用。方法将40例先天性心脏病患儿随机分为对照组(C组,20例)、改良超滤组(M组,20例)。M组在转流结束后应用改良超滤。分别在转流前(T1),转流结束后20min(T2),术后2h(T3),术后6h(T4),术后12h(T5)及术后24h(T6)测定记录呼吸停顿压(Ppause)、潮气量(TV)、呼吸频率(F)、吸入氧浓度(FiO2)和吸气比例(insp )并测量动脉血浆白介素-6(IL—6)、肿瘤坏死因子(TNF—α,)及粘附因子(sICAM—1)浓度。结果两组体外循环术后较术前肺静态顺应性(Cstat)、氧合指数(OI) 明显降低,肺泡—动脉氧分压(AaDO2)明显增加,在T3、T4 、T5时间M组Cstat、OI明显高于C组;AaDO2明显低于C组。IL—6、TNF—α及sICAM—1浓度术后均明显升高,sICAM—1浓度高峰较迟。在T2、T3、T4、T5时间IL—6、TNF—α及sICAM—1浓度两组无明显差别。结论术后肺功能损害可能与CPB术后大量炎性细胞因子释放及黏附因子合成与分泌导致肺毛细血管内皮损伤有关。改良超滤可迅速滤出水分,提高胶体渗透压,改善患儿肺通气功能和换气功能,具有良好肺保护作用,但无明显降低血浆中炎性因子浓度的作用。
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备注/Memo
作者单位: 山东省心血管疾病研究诊治中心,济宁医学院附属医院, 通迅作者: 褚衍林,Email:chuyanlin66@sina.com