Is there anything else I need to know about blood oxygen level tests?
Another type of test, called pulse oximetry, also checks blood oxygen levels. This test doesn't use a needle or require a blood sample. In pulse oximetry, a small clip-like device with a special sensor is attached to your fingertip, toe, or earlobe. Since the device measures oxygen "peripherally"(in an outer area), the results are given as peripheral oxygen saturation, also known as SpO2.
