Title: AboutKidsHealth
Headings: 

Content: The detector measures the amount of oxygen in the blood. This way of checking oxygen is called pulse oximetry. </p><h2>How else can oxygen in the blood be measured?</h2><p>Another way to measure the amount of oxygen in the blood is with a test called an arterial blood gas. Blood is drawn from an artery and tested to see how much oxygen is in it. It's like having blood drawn regularly, except that in this case, the blood is not taken from a vein. The doctor may decide to use pulse oximetry or arterial blood gas, or both, to evaluate the amount of oxygen in your child’s blood. </p><h2>Will the monitor or probe hurt your child?</h2><p>No. The monitor and the probe are completely safe. The probe will be applied securely but not tightly to your child's finger or toe. This does not hurt.