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本文对44例新生儿分三组进行了呼气末二氧化碳分压（Petco2）的测定。计算出PaCO2与PetCO2之差（α-EtCO2）及肺泡动脉氧差（A-aDO2）。无心肺疾患组17例，PetCO231．67±3．16mmHg，a－EtCO23.78±1.68mmHg，A-aDO252.16±10.11mmHg。轻中度肺部疾患组17例，PetCO226．67±9.10mmHg，a－EtCO210.49±5.09mmHg，A－aDO297.59±40.23mmHg。严重肺部疾患组需用呼吸机治疗10例，PetCO225.18±11.35mmHg，a－EtCO221.33±5.09mmHg，AaDO2250.68±89.31mmHg。经统计学处理三组均有显著差异。表明PetCO2可敏感反应肺部疾患严重程度，方法简便可用于指导治疗。
In this paper, 44 newborns were divided into three groups were measured end-tidal carbon dioxide partial pressure (Petco2) determination. The difference between PaCO2 and PetCO2 (α-EtCO2) and alveolar arterial oxygen difference (A-aDO2) were calculated. There were 17 cases without heart and lung disease group, PetCO2 31.67 ± 3.16mmHg, a-EtCO 23.78 ± 1.68mmHg, A-aDO252.16 ± 10.11mmHg. 17 cases of mild to moderate pulmonary disease group, PetCO226.67 ± 9.10mmHg, a-EtCO210.49 ± 5.09mmHg, A-aDO297.59 ± 40.23mmHg. Severe pulmonary disease group required ventilator treatment in 10 cases, PetCO225.18 ± 11.35mmHg, a-EtCO221.33 ± 5.09mmHg, AaDO2250.68 ± 89.31mmHg. The statistical analysis of three groups were significantly different. That PetCO2 can be sensitive to the severity of lung disease, the method is simple and can be used to guide the treatment.