a device, usually attached to the end of a person's finger, used to measure the level of oxygen in their blood

Since the oximeter amplifies the pulse signal, it will pick up a complete loss of a pulse, but not significant decreases. 因为血氧计会将脉搏信号放大，它能检测到失去脉搏，但无法检测到脉搏的明显减弱。

Before induction of anaesthesia, the baby should have an oximeter probe taped on the right hand. 在启动麻醉之前，需用胶带将血氧计的探头贴在婴儿的右手上。