婴幼儿低氧血症的危险性比年龄稍大或成人要大得多,原因之一是功能残气量相对稍低。作者探讨了儿童呼吸暂停时血氧饱和度(SpO_2)降到95%所需的时间。选择年龄1月～12岁、体质ASA1～2级,无心血管异常的择期手术患儿61例进行观察。结果,呼吸暂停之前SpO_2均为100%,降至95%的时间随年龄,身高的增长而延长。 Infants with hypoxemia risk than older or adults is much larger, one of the reasons is the relatively low functional residual capacity. The authors investigated the time it takes for SpO2 to decrease to 95% when a child is apneic. A total of 61 elective children undergoing elective surgery without any cardiovascular abnormalities were enrolled in this study. As a result, SpO2 was 100% before apnea, and 95% of the time was prolonged with age and height.