14 months of PAP therapy for me. I was diagnosed with severe SA (40+ events per minute). Sp02 is useful, but mainly to ensure you're not dipping in o2 from lea

14 months of PAP therapy for me. I was diagnosed with severe SA (40+ events per minute). Sp02 is useful, but mainly to ensure you're not dipping in o2 from leaks, bad fit, incorrect pressure, etc. It is not a diagnostic tool. A sleep study can pick up things like restless leg syndrome, central vs obstructive sleep apneas, RERA's, etc. Regarding the "brain fog" - I know exactly what you're talking about. I've improved mine significantly via: - Getting extensive blood tests to find any deficiencies. Turns out, I was deficient in vitamin D (really bad) and testosterone (which is produced during high quality REM stage, I believe). - Taking a boat load of supplements. L-Tyrosine, NAC, too many to list. Sometimes PAP therapy doesn't fix endocrine issues like testosterone. Going on TRT has been a game changer for both mental and physical improvement.