Health

I have multiple respiratory probs. I check my pulse ox when my breathing becomes more difficult. I look at the first numbers that pop up, but I'm more interested that those numbers are up in a "good" range vs in a lower range which makes my breathing more difficult.

Your doc probably told you what is the best range for you. You can also test yourself over several days to establish what your baseline reading is. That will give you a starting range for comparison.