A normal oximeter reading, indicating healthy blood oxygen saturation, typically falls between 95% and 100%. This range is consistent across multiple reputable sources. Readings below 95% are generally considered low and may indicate a need for medical attention, though some individuals with chronic conditions like lung disease or sleep apnea may have normal levels around 90%.
Understanding Oximeter Readings
Pulse oximetry is a non-invasive method to measure the percentage of oxygen in your blood. A pulse oximeter uses a sensor placed on a finger or toe to determine the oxygen saturation level (SpO2). This value reflects how well your blood is carrying oxygen throughout your body.
- Normal Range: 95-100% This is the generally accepted range for healthy individuals at sea level.
- Low Range: Below 95% This warrants further investigation and potential medical intervention. While some individuals may have lower levels due to pre-existing conditions, it generally indicates inadequate oxygen delivery.
- High Range: Although values above 100% are not possible, consistently high readings near the upper limit (99-100%) may be worth discussing with your doctor. This could indicate some unusual physiological factors.
Several sources confirm this range:
- Cleveland Clinic: States that a normal pulse oximeter reading for oxygen saturation is between 95% and 100%. https://my.clevelandclinic.org/health/diagnostics/22447-blood-oxygen-level
- Yale Medicine: Indicates that a resting oxygen saturation level between 95% and 100% is considered normal for a healthy person at sea level. https://www.yalemedicine.org/conditions/pulse-oximetry
- Mayo Clinic: Notes that healthy pulse oximeter values often range from 95% to 100%, with values under 90% considered low. https://www.mayoclinic.org/symptoms/hypoxemia/basics/definition/sym-20050930
- Numerous other sources (Healthline, MedicineNet, etc.) corroborate this information.
Important Note: This information is for general knowledge and does not constitute medical advice. Consult a healthcare professional for any concerns about your oxygen saturation levels. Factors like altitude and underlying health conditions can influence normal ranges.
