Methods for self-measuring blood oxygen

Currently, the most commonly used method for self-measuring blood oxygen levels is using a pulse oximeter. A pulse oximeter is a basic medical device that can monitor pulse rate, blood oxygen saturation, and perfusion index. The specific steps are as follows:

1. Remain calm before measurement and ensure your hands are warm.

2. Keep your hand, the pulse oximeter, and your heart at the same level.

3. Clip the pulse oximeter onto your finger, remain still, and wait for a period of time until the device displays the result.

4. Read the measurement once the values have stabilized. A value ≥95% indicates normal oxygen saturation; a value <95% suggests hypoxia.

To ensure accurate readings, it is recommended to perform the measurement under the guidance of a healthcare professional. If nail polish is present on the finger being measured, it is advisable to remove it beforehand, as it may interfere with the accuracy of the test results.