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I run my oxygen concentrator at 10 lpm flowing through my cPap while I sleep and it keeps my oximeter at 99%. Wonder if I'm over-dosing? I bought my own machine since no doctors have helped me with my COPD and new pulmonologist won't be seen until December 17! So I'm self-medicating with oxygen, hope I don't do any damage to my lungs? I seem to be fine in the morning...
Yes, humidity has a lot to do with your breathing. I live in hot, humid Georgia. Even with my oxygen on, I cannot. breathe in the summer time. Winter is ok I'd you wrap a scarf over you nose and mouth.