I have awoken today with vertigo and have had to take another day off work which I cannot afford to do. I still cannot figure out why I sometimes wake up and feel lightheaded all day with the chance of vertigo if I move my head too fast. I am seeing a doctor today and I am going to ask for a referr...

CA is referred to nefariously as both Clear Airway and as Central Apnea, unfortunately not always correctly! SleepyHead software defines AHI as the sum of CA+OA+H, and defines CA as Clear Airway! I believe this is incorrect. Do you agree? Hi tenunderpar2! The "Clear Airway" sensing, at least that d...