Ok. Thanks

My husband had to have many arterial blood gas tests which are very painful as they need to take it from an artery vein in your wrist. He would be "out of it" so didn't feel it. The test was done for respiratory diseases that affect lungs and determines if oxygen therapy (C-pap/Bi-pap would be effective for him as he has COPD. His test results showed a c-pap / bi-pap would not help him. I answered this in another "comment" on this post that he was given a non-invasive Ventilator. It was great because when used only at night to sleep, it would give readings to Adapt, the company that supplied machine and they were able to tell us if any problems arised. In the long run, he now uses nothing to sleep because he's had a full laryngectomy to rid of Cancer.