Young E R, Bosco D
J Can Dent Assoc. 1989 Apr;55(4):305-8.
Over the past decade, an array of monitoring devices have been developed to continuously assess patient oxygenation. While actual tissue oxygenation is the most desirable measurement, the pulse oximeter offers a non-invasive method of measuring oxygenation of arterial blood. In this study, the arterial oxygen saturation (SaO2) of children presenting for oral surgical procedures under general anesthesia was continuously monitored. We were particularly interested in the saturation during the period from termination of anesthesia until arrival in the recovery room, a potentially critical 2-3 minutes. This study showed that 22.5 per cent of children significantly desaturated (SaO2 less than 90 per cent) during this period - a figure which is in complete agreement with several similar studies done recently. This desaturation preceded not only hemodynamic changes, but frequently changes in tissue and blood colour as well. The authors conclude that children should receive supplemental oxygen in the immediate recovery phase following general anesthesia.
在过去十年中，已经开发出一系列监测设备来持续评估患者的氧合情况。虽然实际组织氧合是最理想的测量指标，但脉搏血氧仪提供了一种测量动脉血氧合的非侵入性方法。在本研究中，对接受全身麻醉下口腔外科手术的儿童的动脉血氧饱和度（SaO2）进行了持续监测。我们特别关注从麻醉结束到进入恢复室这一潜在关键的2至3分钟期间的饱和度。这项研究表明，在此期间22.5%的儿童出现明显的血氧饱和度下降（SaO2低于90%）——这一数字与最近进行的几项类似研究完全一致。这种血氧饱和度下降不仅先于血流动力学变化，而且常常先于组织和血液颜色的变化。作者得出结论，儿童在全身麻醉后的即刻恢复阶段应接受补充氧气。
