I have a question that I have tried to get an answer for to no avail. I have severe/very severe copd (fev1 29%). I have been on 02 24/7 for 4 years and have kept my copd steady. I have flown many times with portable concentrators. Just took a trip and my sats dropped down to mid 70's - mid 80's when at above 30,000 ft! Very scary!
Since that flight I have been extremely tired and have upped my 02 to 3 LPM constant (was at 2lpm). I wonder if I have injured my lungs further. Hav doc appointment end of month. Anyone experience this??? I am still walking but really get breathless quickly now.