A step-by-step guide to using a pulse oximeter.

  1. Remove any nail polish or false nails.

  2. Warm your hand if cold.

  3. Make sure you have been resting for at least five minutes before taking your measurement.

  4. Rest your hand on your chest at the level of your heart and hold it still.

  5. Switch the pulse oximeter on and place it on your finger. It works best on your middle or index finger of either hand. It should not be used on your ear.

  6. The reading takes time to steady. Keep the pulse oximeter in place for at least a minute, or longer if the reading keeps changing.

  7. Record the highest result once the reading has not changed for five seconds.

  8. Be careful to identify which reading is your heart rate and which is your oxygen level.

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