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呼气末二氧化碳分压在早产儿呼吸窘迫综合征病程中的变化 被引量:3

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摘要 目的 探讨机械通气治疗早产儿呼吸窘迫综合征(respiratory distress syndrome,RDS)时呼气末二氧化碳分压(arterial partial pressure of end-tidal carbon dioxide,PetCO2)的变化规律.方法 监测2011年3月1日至2012年6月30日入住淮安市妇幼保健院新生儿重症监护室的28例RDS早产儿机械通气后不同情况下PetCO2变化,计算氧合指数(oxygention index,OI)、动脉血氧分压与肺泡气氧分压比值(ratio of arterial-to-alveolar partial pressure of oxygen,PaO2/PAO2,即a/A)及动脉血-呼气末二氧化碳分压的差值(arterial-alveolar carbon dioxide tension difference,a-ADCO2),分析动脉血二氧化碳分压(arterial partial pressure of carbon dioxide,PaCO2)与PetCO2的相关性及变化规律.采用相关性分析、曲线拟合及方差分析、t检验等进行统计学分析.结果 (1)PaCO2与PetCO2呈正相关(r=0.693,P=0.000).(2)PetCO2变化的曲线方程为Y=26.616+0.521X-0.014X2.(3)在不同OI范围内,PaCO2与PetCO2均呈正相关(P均<0.05);随着OI增加,相关系数呈下降趋势,PetCO2呈下降趋势.(4)在不同a/A范围内,PaCO2与PetCO2均呈正相关(P均<0.05).(5)a-ADCO2随机械通气时间延长而降低,各时间点a ADCO2整体比较,差异均有统计学意义(F=8.538,P=0.000);a-ADCO2随着OI升高而升高,各OI范围a-ADCO2整体比较,差异均有统计学意义(F=3.921,P=0.026);a-ADCO2随着a/A升高而降低,各a/A范围a-ADCO)2整体比较,差异均有统计学意义(F=9.831,P=0.000).(6)生后不同时间点,根据PetCO2不同范围判断PaCO2是否超出范围[>60 mm Hg(1 mm Hg=0.133 kPa),<35 mm Hg]具有较高的敏感性和特异性.结论 在RDS早产儿机械通气治疗中,实时动态监测PetCO2变化,可估计PaCO2和判断病情,指导呼吸机参数设置.
出处 《中华围产医学杂志》 CAS 北大核心 2013年第10期616-618,共3页 Chinese Journal of Perinatal Medicine
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参考文献9

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同被引文献38

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