What device should providers use to monitor oxygen saturation?

The pulse oximeter is the appropriate device to monitor oxygen saturation because it is designed specifically for this purpose. It works non-invasively by using light absorption to measure the percentage of hemoglobin in the blood that is saturated with oxygen. A pulse oximeter provides real-time readings, allowing healthcare providers to assess a patient's respiratory function and determine whether supplemental oxygen is needed for those experiencing respiratory distress or other complications.

In contrast, a thermometer measures body temperature and is not relevant for gauging oxygen levels in the blood. A stethoscope is used primarily to listen to heart and lung sounds, helping assess cardiovascular and respiratory health, but does not provide information about oxygen saturation. Lastly, while the term "pulsometer" may be used in some contexts related to measuring heart rate or pulse, it is not a standard device specifically designed for monitoring oxygen saturation. Therefore, the pulse oximeter is the correct choice for accurately assessing oxygen levels in patients.