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目的 探讨小儿呼气末二氧化碳浓度 (FetCO2 )与动脉血二氧化碳分压 (PaCO2 )的关系以及不同年龄组间是否存在差异。方法 用德国Siemens 930型二氧化碳分析仪和丹麦BME 33型血气分析仪 ,同步测量 119例全麻患儿的FetCO2 和PaCO2 。按照年龄将病人分成甲组 (0～ 1岁 )、乙组 (1～ 4岁 )和丙组 (4～ 9岁 ) ,分别比较其相关关系。结果 全年龄组 119例FetCO2 与PaCO2 呈正相关 ,r =0 .6 14 2 (P <0 .0 5 )。甲组 (30例 )二者虽呈正相关 ,但不够显著 ,r =0 .4 6 2 9(P >0 .0 5 ) ;乙组 (48例 )和丙组 (41例 )二者呈显著正相关 ,r分别为 0 .74 36和 0 .796 8(P均 <0 .0 1)。结论 FetCO2 与PaCO2 有较好的相关关系 ;患儿年龄可影响FetCO2 的准确性 ,在使用中需结合临床 ,综合判断通气是否适当
Objective To investigate the relationship between end-tidal carbon dioxide (FetCO2) and arterial partial pressure of carbon dioxide (PaCO2) in children and whether there is any difference between different age groups. Methods Simultaneous measurement of FetCO2 and PaCO2 in 119 children with general anesthesia was performed by Siemens 930 carbon dioxide analyzer and Danish BME 33 blood gas analyzer. The patients were divided into group A (0-1 year old), group B (1-4 years old) and group C (4-9 years old) according to their age, and their correlations were compared respectively. Results There were 119 positive correlations between FetCO2 and PaCO2 in all age groups, r = 0.142 (P <0.05). There was a positive correlation between group A (n = 30) and group A (n = 30), but not significant (r = 0.4629; Positive correlation, r were 0.74 36 and 0.796 8 (P <0.01). Conclusion FetCO2 and PaCO2 have a good correlation; children’s age can affect the accuracy of FetCO2 in the use of clinical need to be combined to determine the appropriate ventilation