15/11/2025
Methods of Taking Blood Oxygen Levels (SpO₂)
A pulse oximeter is a small device used to check your blood oxygen level (SpO₂) and heart rate.
You can place it on your finger or toe.
It works by shining infrared light through the skin and measuring how much oxygen is in your blood.
✅ Understanding Blood Oxygen Levels (SpO₂)
• 98% to 100%
This is normal. Your body has enough oxygen. No action is needed.
• 95% to 97%
This is a little lower than normal, but usually still okay.
You should monitor and consult a doctor if it stays low.
• 92% to 94%
This means your oxygen is decreased.
It may indicate a health problem. A doctor’s evaluation is recommended.
• 88% to 92%
This is low oxygen.
There is a high risk of hypoxia (not enough oxygen in the body).
Medical attention is needed immediately.
• Below 88%
This is a critical level.
It means severe hypoxia and is very dangerous.
You need emergency medical treatment or hospitalization right away.
✅ Simple Summary
A pulse oximeter helps check oxygen in your blood.
Normal is 98–100%.
Anything below 94% needs medical advice.
Anything below 88% is an emergency.
