2003•Unpublished venueRequires access

Influence on pulmonary surfactant activity after deep hypothermic cardiopulmonary bypass in infants

孙勇, 苏肇伉, 杨艳敏, 张海波, 郑景浩, Zhiwei Xu

Abstract

目的研究比较深低温停循环(DHCA)和深低温低流量(DHLF)对先心病婴儿肺功能及肺表面活性物质(PS)活性水平的影响.方法20例室间隔缺损伴肺动脉高压婴儿,根据行心肺转流(CPB)方法的不同,随机平均分为DHCA组和DHLF组.分别测定两组CPB前,CPB后5min,CPB后2h的肺静态顺应性、肺气道阻力、呼吸指数及饱和卵磷脂/总磷脂(SatPC/TPL)和饱和卵磷脂/总蛋白(SatPC/TP)值.结果CPB后5min和CPB后2h,两组的肺静态顺应性都较CPB前明显降低(P均＜0.01);肺气道阻力和呼吸指数都明显升高(P均＜0.01).CPB后2 h DHLF组肺静态顺应性下降的幅度和呼吸指数增加的幅度都明显大于DHCA组(P均＜0.01).CPB后5 min和CPB后2h,二组的SatPC/TPL和SatPC/TP都较CPB前明显降低(P均＜0.01).CPB后5 min,DHLF组Sat-PC/TPL下降的幅度明显大于DHCA组(P＜0.05);CPB后2h,DHLF组SatPC/TPL和SatPC/TP下降的幅度都明显大于DHCA组(P均＜0.01).DHLF组术后ICU滞留时间明显高于DHCA组(P＜0.05).结论DHCA和DHLF都能明显引起先心病婴儿肺功能受损及PS活性水平的下降,但DHLF较DHCA对肺的损伤更为严重.

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Key concepts: Cardiopulmonary bypass, Medicine, Anesthesia, Pulmonary surfactant, Hypothermia, Intensive care medicine, Cardiology, Internal medicine