My wife wants me to try to get on oxygen, she feels it would greatly help me. I know that this means getting a arterial blood gas. Frankly I have been surprised that I have not recieved on yet. I am like many with COPD I get tired as the day goes on. I get numb and tingly in my hands and feet, feeling heavy in my chest, but my fingers have not turned blue. I know if I ask for it they will most likely give me one. They love to draw blood. I am just leary of getting it and not needing it. I have had it before and it still holds a firm place in my memory.