what is a meter called to check oxygen levels
Two Parts:Preparing to Use a Pulse OximeterUsing a Pulse OximeterCommunity Q&A. Pulse oximetry is a simple, cheap, and noninvasive procedure used to measure the level of oxygen (or oxygen saturation) in the blood. Oxygen saturation should always be above 95 percent. However, oxygen saturation may be lower if you have a respiratory disease or congenital heart disease.