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目的探讨经皮二氧化碳分压(PTCCO2)监测与动脉血二氧化碳分压(PaCO2)的相关性。方法择期行先天性心脏病矫治术患儿40例,年龄1-10岁,体重10-45kg。分别在麻醉后10min(T1)、主动脉阻断前(T2)、停降温(T3)、主动脉开放后10min(T4)和超滤后(T5)5个时间点同时记录PaCO2(血气分析)、呼气末二氧化碳分压(PETCO2)及PTCCO2监测值,分析PaCO2与PTCCO2和PaCO2与PETCO2的相关性。结果 PaCO2与PTCCO2和PaCO2与PETCO2之间均有良好的相关性。PaCO2与PTCCO2的差异(x珚±2SD)为(-5.5±3.4)mm Hg,PaCO2与PETCO2的差异为(4.5±17.2)mm Hg(P<0.05)。结论 PTCCO2与PaCO2监测值相关性良好,可作为小儿先天性心脏病矫治术中一项可靠的二氧化碳分压监测手段。
Objective To investigate the correlation between percutaneous carbon dioxide partial pressure (PTCCO2) monitoring and arterial partial pressure of carbon dioxide (PaCO2). Methods Forty children with elective cardiac surgery underwent elective cardiac surgery, aged 1-10 years and weighing 10-45 kg. PaCO2 (blood gas analysis) was recorded simultaneously at 5 time points after anesthesia (T1), aortic block (T2), stop cooling (T3), 10 min after aortic opening (T4) and ultrafiltration (T5) , Partial pressure of end-of-expiration carbon dioxide (PETCO2) and PTCCO2 monitoring values were used to analyze the correlation between PaCO2 and PTCCO2 and PaCO2 and PETCO2. Results There was a good correlation between PaCO2 and PTCCO2 and between PaCO2 and PETCO2. The difference between PaCO2 and PTCCO2 (± 2 ± 2SD) was (-5.5 ± 3.4) mm Hg, and the difference between PaCO2 and PETCO2 was (4.5 ± 17.2) mm Hg (P <0.05). Conclusions PTCCO2 has a good correlation with PaCO2 monitoring value, which can be used as a reliable monitoring method of partial pressure of carbon dioxide in children with congenital heart disease.