汉族年龄大于15岁人群动脉血氧分压、动脉血二氧化碳分压与年龄关系的临床观察

Clinical observation of correlations between arterial partial pressure of oxygen, arterial partial ;pressure of carbon dioxide and age in the population of Han nationality over 15 years old

目的：探讨汉族年龄大于15岁人群动脉血氧分压（PaO2）及动脉血二氧化碳分压（PaCO2）与年龄的关系。方法选择无肺部疾患的汉族年龄大于15岁择期手术患者300例，ASA分级Ⅰ～Ⅲ级，其中男162例，女138例，年龄15～93岁，体质量42～103 kg。局部麻醉下行桡动脉或足背动脉穿刺、置管，连接换能器测压，麻醉前经此采血行血气分析。结果单因素线性回归分析表明，PaO2与年龄呈线性负相关，两者计算公式：PaO2（mmHg）＝101.7-0.278×年龄（岁），1 mmHg＝0.133 kPa，R2＝0.903。PaCO2不随年龄改变而改变，平均值为（38.2±2.8）mmHg。结论PaO2随年龄增大而逐步下降，PaCO2不受年龄影响。

Objective To evaluate the correlations between arterial partial pressure of oxygen （PaO2）, arterial partial pressure of carbon dioxide （PaCO2） and age in the population of Han nationality aged over 15 years old. Methods Three hundred Chinese Han nationality patients who underwent elective surgery were selected. They were involved in ASA class Ⅰ-Ⅲ, including 162 male and 138 female. Radial artery or dorsalis pedis artery was punctured, performed indwelling catheter, and connected the pressure transducer under local anesthesia. Blood gas analysis was collected before anesthesia. Results The linear regression trend diagram showed that the level of PaO2 had linear negative correlation with age . The calculating formula was PaO2（mmHg） = 101.7- 0.278 × age （years） （1 mmHg = 0.133 kPa, R2=0.903）. The level of PaCO2 didn′t change with age, and average was （38.2 ± 2.8） mmHg. Conclusions The level of PaO2 is gradually decreased with age, but the level of PaCO2 isn′t affected by age.