The recent global pandemic has increased the demand for fingertip pulse oximeters, not just among medical professionals, but also among individuals. These are basically noninvasive tests that determine the degree of oxygen saturation present in the human blood. Using these small sized medical equipment, it is possible to detect even the minor variations in oxygen levels in real time. The levels indicated in the clip-on fingertip pulse oximeters are indicative of how effectively blood transports oxygen to the extremities farthest from your heart, such as your arms and legs.