A Pulse Oximeter is a medical device used to measure a patient’s Oxygen saturation, or the percentage of a patient’s blood that is loaded with oxygen. The non-invasive measurement is commonly taken by simply placing the patients finger into a probe though may also be taken with a clip sensor or wrap sensor. Wavelength light is passed through the patient and the measurement is taken.
While Pulse oximetry dates back as early as the early 1930’s, it is one of the most common vital measurement taken by patients today. While basic pulse oximeters provide a snapshot measurement of O2 saturation, more advanced monitors take continuous readings over a time period which has become very popular in sleep studies to detect certain disorders.