机构地区:[1]东南大学附属中大医院危重病医学科,东南大学急诊与危重病医学研究所,南京市210009 [2]江苏省无锡市第一人民医院ICU,无锡市214002
出 处:《中华老年多器官疾病杂志》2007年第4期261-266,共6页Chinese Journal of Multiple Organ Diseases in the Elderly
基 金:江苏省医学领军人才基金(2006);江苏省六大人才高峰基金(1190000009);教育部新世纪优秀人才基金(SCET-04-0476)资助课题
摘 要:目的探讨俯卧位通气联合控制性肺膨胀(sustained inflation,SI)对肺内源性急性呼吸窘迫综合征(ARDSp)和肺外源性急性呼吸窘迫综合征(ARDSexp)犬的气体交换的影响。方法健康杂种犬48只,随机分为ARDSexp和ARDSp组,每组24只,静脉注射油酸复制ARDSexp模型,盐酸灌肺复制ARDSp模型,再随机各分为4组,每组6只,分别应用俯卧位通气(PC)、俯卧位通气联合SI(PS)、仰卧位通气(SC)、仰卧位通气联合SI(SS)。观察造模前基础状态,ARDS0、2、5h时氧合指数(PaO2/Fi O2)、动脉血二氧化碳分压(PaCO2)的变化,同时监测呼吸力学、平均动脉压(MAP)和心率的变化。结果对于ARDSexp和ARDSp犬SC组、PC组、SS组及PS组的PaO2/Fi O2在基础状态分别为(419±19)、(357±23)、(476±57)、(449±23)、(535±26)、(532±27)、(529±35)、(520±50)mmHg;在0h为(123±27)、(117±44)、(141±38)、(101±35)、(123±58)、(136±61)、(117±45)、(116±21)mmHg,各组间差异无统计学意义(P>0.05),但均显著低于基础值(P<0.05)。PS对于ARDSexp和ARDSp均能显著改善氧合(378±78/117±45;209±65/116±21,P<0.05),但对ARDSexp氧合改善作用更明显(378±78/209±65,P<0.05)。同时点,对于不同原因的ARDS,PS比单独PC及单独应用SI能更好地改善氧合(P<0.05)。在氧合改善的同时降低了气道阻力,增加了肺顺应性,并且对MAP、心率和PaCO2无明显影响。结论对于不同原因ARDS,PS较单应用PC及单应用SI能更好地改善氧合,且对于ARDSexp氧合改善作用更明显,氧合改善的时间更早。Objective To study the effects of prone position ventilation(PPV) and sustained inflation(SI) on gas exchange in dogs with acute respiratory distress syndrome(ARDS) resulting from pulmonary cause(ARDSp) and from extra-pulmonary cause(ARDSexp). Methods Forty-eight healthy mongrel dogs were randomly divided into ARDSexp group and ARDSp group. Each group contained 24 dogs. ARDSexp dogs were injected with oleic acid through femoral vein and ARDSp dogs inspired hydrochloric acid to cause lung injury. ARDSexp and ARDSp dogs were randomly divided into prone position convention ventilation (PC) group, prone position ventilation and SI (PS) group, supine position convention ventilation (SC) group, supine position ventilation and SI (SS) group. PaO2/FiO2 and PaCO2 were measured before (baseline) and at 0, 2 and 5 h after ARDS model establishment. Respiratory mechanics, arterial pressure, and heart rate were also recorded at the same time. Results In the 4 groups of ARD- Sexp dogs and 4 groups of ARDSp dogs, PaO2/FiO2 was (419± 19), (357±23), (476± 57), (449±23), (535±26), (532±27), (529±35) and (520±50)mmHg at baseline; at 0 h, was (123±27), (117±44), (141±38), (101±35), (123±58), (136±61), (117±45) and (116±21)mmHg respectively. There was no significant difference in PaO2/FiO2 between different groups at 0 h(P〉0.05), but it was significantly lower than that at baseline(P〈 0.05). PS could significantly improve oxygenation of ARDSexp and ARDSp dogs(378 ± 78/117 ± 45 ; 209 ± 65/116 21 ,P〈0. 05) ,but the effect of improving oxygenation was more significant in ARDSexp dogs than in ARDSp dogs (378±78/209±65 ,P〈0. 05). At 2 h and 5 h, the effect of improving oxygenation was more significant in PS group than in PC group and in SS group(P〈0.05). Except for improving oxygenation, PS could decrease air way resistance (Raw) and improve lung compliance(Cst) of ARDSexp and AR
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