Do they usually perform this in the middle of a severe exacerbation? I couldn't walk more than a couple yards 6-MWT) after a severe flare. I got the orders for home oxygen, an antibiotic, and the correct dose of prednisone. I just had this test repeated, and don't need the oxygen since I'm improved. I have to have an overnight test to prove I don't need oxygen at night. I don't think I ever did. Will I be going through this paperwork every time I get sick. I guess I need to buy my own stuff instead of having Medicare order it.