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作 者:吴晓燕[1] 郑瑞强[1] 刘火根[2] 黄东亚[2] 黄英姿[2] 邱海波[2]
机构地区:[1]扬州大学医学院附属苏北人民医院急诊与危重病医学科,江苏省225001 [2]东南大学附属中大医院重症医学科
出 处:《中华医学杂志》2011年第43期3086-3089,共4页National Medical Journal of China
基 金:江苏省自然科学基金(BK2008298)
摘 要:目的研究以膈肌电活动(EAdi)指导急性呼吸窘迫综合征(ARDS)肺复张后呼气末正压(PEEP)的选择。方法盐酸吸入法复制兔ARDS模型,充分肺复张后分为EAdi法选择最佳PEEP组(EAdi组)、最佳氧合法选择最佳PEEP组(最佳氧合组),两组潮气量(VT)维持6ml/kg,分别机械通气3h。观察两组在基础、成模、机械通气1、2、3h时的呼吸力学、气体交换及血流动力学的变化。结果EAdi组PEEP为(10.4±1.0)cmH2O,最佳氧合组为(9.7±2.1)cmH2O,组间比较差异无统计学意义(P〉0.05);呼吸力学:机械通气1、2、3h,EAdi组与最佳氧合组气道峰压(Ppeak)、气道平均压(Pm)差异无统计学意义(P〉0.05);气体交换:机械通气1、2、3h,EAdi组氧合指数(PaO2/FiO2)较成模时显著升高(P〈0.05),EAdi组PaO2/FiO2、动脉血二氧化碳分压(PaCO2)与最佳氧合组比较差异无统计学意义(P〉0.05);血流动力学:机械通气1、2、3h,EAdi组心率(HR)、平均动脉压(MAP)与基础、成模时比较差异无统计学意义(P〉0.05),与最佳氧合组相比差异无统计学意义(P〉0.05)。结论EAdi法选择PEEP能够明显改善ARDS低氧血症,且对血流动力学无显著影响,可指导ARDS最佳PEEP的选择。Objective To explore the relationship of electrical activity of diaphragm (EAdi) and positive end-expiratory pressure (PEEP) in a rabbit model of acute respiratory distress syndrome (ARDS). Methods The rabbit model of ARDS was induced by an intratracheal infusion of hydrochloric acid. After a sufficient amount of recruitment maneuvers (RM) , the level: the PEEP levels were (10. 4±1.0) cm H20 in EAdi group and (9. 7±2.1 ) cm H20 in rabbits were divided into 2 groups: (1)PEEP titration with EAdi (EAdi group); (2)PEEP titration with maximum oxygenation (maximum oxygenation group). The tidal volume was 6 ml/kg in 2 groups. Pulmonary mechanics, gas exchange and hemodynamic were observed in two groups at baseline, after lung injury and ventilation 1, 2, 3 h respectively. Results (1)PEEP maximum oxygenation group. There was no significant difference between two groups ( P 〉 0. 05 ). ( 2 ) Pulmonary mechanics: there was no significant difference in peak pressure (Ppeak) and mean pressure (Pm) between two groups at ventilation 1,2, 3 h (P 〉 0. 05 ). (3) Gas exchange : at ventilation 1,2, 3 h, the oxygenation index ( PaO2/FiO2 ) in EAdi group was higher than that of after lung injury ( P 〈 0. 05 ) and there was no significant difference in PaO2/FiO2 and partial pressure of arterial carbon dioxide ( PaCO2 ) between two groups ( P 〉 0.05 ). (4) Hemodynamic : at ventilation 1,2, 3 h, the heart rate (HR) and mean artery pressure (MAP) in EAdi group had no significant differences with baseline, after lung injury and maximum oxygenation group ( P 〉 0. 05 ). Conclusion EAdi may be an ideal method for PEEP titration at post-RM in an ARDS model.
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