Whether the oxygen saturation Sensor is off, the folder location of the skin and blood circulation is factors of accuracy for oxygen saturation.

血氧饱和度传感器是否脱落。所夹部位皮肤及血液循环是否良好，是影响血氧饱和度准确性的因素。

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Glenn placed a sensor on her finger to measure her pulse and blood oxygen. Then he began to gather her information.

Glenn在她的手指上安放了一个传感仪，用于测量她的脉搏和血液含氧量。

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Home testing uses fewer sensors typically a nose or mouth sensor to detect breathing, a finger clip to measure blood oxygen levels and a chest band to see if your body is trying to breathe.

WSJ: A Test for Sleep Apnea From Your Own Bedroom