Pulse Oximetry: Uses and Limitations

Pulse oximetry is a useful noninvasive tool in the assessment of a patient suspected of hypoxia. On literature review, few medical and nursing articles explain how to properly use this tool. This article reviews the basic physics of the pulse oximeter machine and proper use of the oximeter. Limitations and sources of error in pulse oximeter technology are also delineated. Finally, correct interpretation and application of information obtained by pulse oximetry are explained.