What does SpO2 actually measure? SpO2 is an estimate of the percentage of hemoglobin in your blood that is carrying oxygen.

An SpO₂ reading of 94% is slightly below the usual range for a healthy adult at sea level. A pulmonologist explains what can cause the reading, when to repeat it and when medical attention is needed.

A study led by biomedical scientist Erica Heinrich at the University of California, Riverside, highlights a critical gap in how clinicians detect and treat breathing distress (dyspnea), particularly ...