Hello and thank you. Yes, I would consider anything that will be helpful. I did breathe into a tube but it was not attached to any machine. My lung function on this was good according to this test but of course it may have been a rudimentary one. While I am still congested, I noticed I am breathing a little better and definitely sleeping better in the last several weeks...little moments of hope. Another consulting physician expressed doubt again that it is COPD. I will go with this for now, but will do the course of treatment recommended until I know what is actually happening. Thanks again!