When we breath, the oxygen of air dissolves in to blood and gets bound to hemoglobin in blood. This bound form of oxygen can vary in various disease conditions and can be used as a monitoring tool for therapy for these conditions. The measure of saturation of hemoglobin with oxygen i.e. spO2 is indicated in percentage and this can be monitored with pulse oximeters.
Pulse oximeter is a non invasive tool for measuring oxygen saturation. The gold standard for the same still remains arterial blood gas analysis only however it requires sophisticated equipment along with the need to draw blood sample with a syringe. READ MORE