A pulse oximeter is a non-invasive medical device used for measuring oxygen saturation in the blood. It is a small electronic device that is typically attached to the end of the finger, according to the University of Texas Medical Branch (UTMB).
History
Pulse oximetry is the science behind measuring respiratory performance. The pulse oximeter came about in the late 1950s, according to the UTMB.
Significance
The human eye cannot detect respiratory failure or deterioration as well as a a pulse oximeter can. Measuring how much oxygen is being carried to the blood is a more accurate way to monitor patients with breathing issues.
Function
The oximeter works by shining a red and infrared light through the body tissue and measuring its absorption by the blood, according to the UTMB. The oximeter then produces a reading of the blood oxygenation level or saturation level.
Inaccuracies
Several factors can inhibit the accuracy of the pulse oximeter, including carbon monoxide exposure or poor placement near a bone, according to the Boston Globe.
Uses
Anyone at risk of hypoxemia, or loss of oxygen in the blood, is likely to be monitored using a pulse oximeter, according to the UTMB. Individuals undergoing surgery or anesthesia may also be monitored. Home health care patients using oxygen or suffering from respiratory deficiencies can also use a pulse oximeter.
