Spo2 normal range: Learn the ideal blood oxygen level

Learn the ideal blood oxygen level range , how to measure it, and when to seek medical help. Find out how factors like activity, health, and wearable devices can affect your SpO2 readings. Pulse oximetry is a non-invasive method for measuring blood oxygen levels at home and in healthcare settings (e.g., doctor's offices, hospitals). 6 A pulse oximeter is a small device that clips ... Definition: SpO2 represents the percentage of hemoglobin molecules carrying oxygen in arterial blood. A value of 95% means 95% of hemoglobin is oxygenated. Significance: Normal SpO2 (95–100%) indicates efficient oxygen delivery to tissues, essential for organ function. Readings below 90% (hypoxemia) suggest respiratory or cardiovascular issues.