Final answer:
A pulse oximeter is used to measure the oxygen saturation level in the blood. It is a non-invasive and painless method commonly used in medical settings.
Step-by-step explanation:
The oxygen saturation level in the blood can be measured with a Pulse oximeter. A pulse oximeter is a medical device that measures the level of oxygen saturation in the blood by shining light through the skin and detecting the amount of oxygen-bound and unbound hemoglobin. It is a non-invasive and painless method of determining oxygen levels and is commonly used in hospitals, clinics, and even at home.
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