Normal blood oxygen levels, measured as oxygen saturation (SpO2), generally range from 95% to 100% for adults and children. However, this can vary slightly with age.
Oxygen Saturation Levels by Age Group
- Adults and Children (under 70): A reading between 95% and 100% is considered normal. Anything below 95% is generally considered low and may warrant medical attention.
- Older Adults (over 70): While the ideal range remains 95-100%, many healthy older adults may have slightly lower levels, around 95%, and this is often considered within the normal range for their age group. Levels below 93% should be evaluated by a healthcare professional.
It's important to remember that these are general guidelines. Individual variations exist, and other factors such as altitude, underlying health conditions, and recent activity can affect oxygen saturation levels. Always consult a doctor to interpret your oxygen saturation readings, especially if they fall outside the typical ranges or if you are experiencing symptoms such as shortness of breath or fatigue.
Understanding the Measurement
Oxygen saturation is measured using a pulse oximeter, a small, non-invasive device that clips onto a fingertip. It measures the percentage of hemoglobin in the blood that is carrying oxygen.
When to Seek Medical Attention
Seek medical advice if your oxygen saturation consistently falls below 95% (or below 93% for those over 70), or if you experience symptoms such as:
- Shortness of breath
- Dizziness
- Confusion
- Chest pain
- Cyanosis (bluish discoloration of the skin)
Note: The information provided here is for general knowledge and should not be considered medical advice. Consult a healthcare professional for any health concerns.
