Pulse Oximetry

What is pulse oximetry?

Pulse oximetry is a test that measures the oxygen saturation level of the blood.

A pulse oximeter is a medical device used to measure the oxygen saturation level (SpO2) and pulse rate (heart rate) of an individual. It is a small, portable, and non-invasive device that is commonly used in healthcare settings and is also available for home use.

Why is pulse oximetry done?

This procedure is performed by a specialist called a pulmonologist who specializes in lung disorders.

What to expect during a pulse oximetry test?

During the test

  • A small clip-like device called a pulse oximeter is gently attached to the finger.
  • The pulse oximeter may emit a small beam of light, which is painless and non-invasive.
  • The patient may be asked to keep still during the test to obtain accurate readings.
  • The pulse oximeter displays oxygen saturation level and may also show heart rate.

Interpreting Pulse Oximetry Readings

The pulse oximeter reading is usually displayed as a percentage, indicating the oxygen saturation level in the blood. A normal reading is typically between 95% and 100%.


  1. American Lung Association. Pulse Oximetry. Available from: https://www.lung.org/lung-health-diseases/lung-procedures-and-tests/pulse-oximetry
  2. Pulse Oximetry. Available from: https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/pulse-oximetry
  3. Pulse Oximetry: Purpose, Uses, and How to Take a Reading. Available from: https://www.healthline.com/health/pulse-oximetry

Select your Location

Please select your nearest location from the list below