Choicemmed kids fingertip pulse oximeter serial uses cartoon appearance design, reducing the fear of the children and make them actively cooperative with medical staff checks. Small size and light weight design will not cause too much pressure on kids finger let mom and dad feel more ease. SpO2 stands for peripheral capillary oxygen saturation, an estimate of the amount of oxygen in the blood. More specifically, it is the percentage of oxygenated hemoglobin (hemoglobin containing oxygen) compared to the total amount of hemoglobin in the blood (oxygenated and non-oxygenated hemoglobin). An oximetry is a test done by a machine called a pulse oximeter. A sensor is placed onto your child's finger, toe or ear lobe. The sensor uses light to measure the amount of oxygen in your child's blood, as.