Slagæðasúrefnismettun

Slagæðasúrefnismettun, commonly referred to as arterial oxygen saturation, is a vital sign that measures the percentage of hemoglobin in red blood cells that is carrying oxygen. It is typically expressed as SpO2, which is the peripheral capillary oxygen saturation, and is measured non-invasively using a pulse oximeter. Normal arterial oxygen saturation levels in healthy individuals at sea level generally range from 95% to 100%. Lower values may indicate hypoxemia, a condition where there is an abnormally low level of oxygen in the blood. Factors such as lung disease, heart conditions, altitude, and certain medications can affect arterial oxygen saturation. A pulse oximeter works by passing red and infrared light through a translucent part of the body, such as a fingertip or earlobe, and measuring the absorption of these lights by oxygenated and deoxygenated hemoglobin. The device then calculates the saturation level. Consistent monitoring of arterial oxygen saturation is crucial in medical settings for assessing respiratory and circulatory function, guiding treatment decisions, and monitoring patient recovery.