Why Accuracy in Oxygen Monitoring Matters Pulse oximeters are among the most widely used medical devices in hospitals, clinics, and even home settings. They provide quick, noninvasive readings of blood oxygen saturation (SpO₂) and pulse rate, information that guides critical decisions in care and monitoring. But accuracy can vary significantly between devices. An FDA-cleared pulse oximeter is a medical device that has passed the 510(k) review process , proving that it is