Diagnostics·Diagnostics
Pulse oximetry
Informed by recognized medical guidance
Overview
Pulse oximetry is a simple, painless test that checks how much oxygen is in your blood. It uses a small device that clips onto your finger, toe, or earlobe.
Key facts
- It measures oxygen saturation (SpO2) – the percentage of oxygen carried by red blood cells.
- A normal reading is usually between 95% and 100% for most people, but your doctor will tell you what is normal for you.
- It is commonly used in hospitals, clinics, and even at home to monitor breathing problems.
Yes. Pulse oximetry is a very common test in healthcare settings and is also available for home use.
Anyone may have a pulse oximetry test if their oxygen levels need to be checked – for example, people with lung conditions, heart problems, COVID-19, or during and after surgery.