Finger pulse oximeters are mainly useful to reassure you that your oxygenation is OK (90+%), or that you should don oxygen or troubleshoot the situation (85% or below). The fact that their readings are often inaccurate and misleading does not mean that they are useless!
What is oximetry?
Oximetry is a procedure for measuring the concentration of oxygen in the blood. The test is used in the evaluation of various medical conditions that affect the function of the heart and lungs. Read More …