I have GERD issues and sometimes I do feel that my breath is getting struck. Now for the very reason I started using pulse Oximeter daily to check my oxygen saturation. But I do get some strange readings. It do start with a saturation of 98 or 99 but suddenly after 20 to 30 seconds it will show 79,89, 94 than 98 or 99 or 60, 80, 90, 94 than 98 or 94. This abnormal reading will be displayed mostly for 3-4 Seconds. After from a feeling that something is strucked, I don't have any Issues and am moderately active.
Spirometry and pulmonary function tests is advised to the patient.