Amanda Turkiewicz

How do I know if I need oxygen?

A healthcare provider will figure out if you need oxygen therapy by testing the amount of oxygen in your blood. This can be done with a test called an arterial blood gas (ABG). An ABG involves taking a sample of blood from an artery (usually in the wrist). Your oxygen level (oxygen saturation or O2 Sat) can also be measured with a small device called a pulse oximeter.  This device can be clipped painlessly on to your finger, toe or earlobe.  With this device your oxygen levels can be checked over a period of time, for example, during sleep or exercise.  The general treatment goal is to keep your oxygen at a level that meets the body's need for oxygen, usually 88% or above.