Cindy...I have to admit that I had no idea what a pulse oximeter was until I Googled it. And in doing so, I also found an article that indicated that professionals are split on having people buy these unless they have underlying respiratory issues such as your asthma. The American Lung Association indicated that use of this device without an underlying condition could lead to increased anxiety.
I don't know...it seems like it would be a good tool. But I can also see how people who are already freaking out over this disease (with good cause in some parts of the country) might find constant checking of their blood oxidation level pretty stressful. In any event, I appreciate you sharing the suggestion with us.