Pulse Oximetry: Purpose, Uses, and How to Take a Reading

 Pulse oximetry is a test used to measure the amount of oxygen in your blood. This information can be used to diagnose conditions that affect the amount of oxygen in your blood, such as anemia, heart failure, and sleep apnea. The test is simple and noninvasive. A small sensor is taped to your finger or earlobe and measures the percentage of oxygen in your blood. The results are shown on a monitor.

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