I am unsure which category this would fall under, but I have been diagnosed with COPD and I was diagnosed in the Hospital. I fell deathly sick and my Brother rushed me to the Hospital and I was comatose for four to five days in ICU. I was told I had an extreme build-up of carbon-dioxide in my system that caused the coma. I tell you this for a little background information. I have been given a CPAP machine, but the problem is when I put it on I feel like I am trying to breath in a tornado. I have yet to fall asleep with the machine. I would like to know is there anything I can do to help me sleep with this mask on. I have layed there for an hour or more and still cannot fall asleep with the mask. I would appreciate any suggestions you might have.