What is the purpose of pulse oximetry?

The purpose of pulse oximetry is to measure the oxygen concentration in the blood, specifically the saturation of oxygen in hemoglobin. This non-invasive method utilizes a small device typically placed on a fingertip, earlobe, or other areas with good blood circulation. It emits light wavelengths that pass through the skin and blood, allowing the device to determine how much hemoglobin in the blood is saturated with oxygen.

This information is crucial in clinical settings as it helps healthcare providers monitor a patient's respiratory function and overall oxygen levels in the body. A low oxygen saturation can indicate potential respiratory problems or other health issues requiring immediate intervention. Consequently, understanding the measurement provided by pulse oximeters is integral for assessing a patient's respiratory and circulatory health.