Background: Now 4.5 months in on my Philips DS2. Pretreatment sleep test AHI was 45, and am still stuck around 10 despite some promising initial trends. (The data gap was due to a nasty URI for several weeks).
Min-max pressure settings are 6 and 15cm, although I never see the max being approached (last night mean was 7.6 and 90% pressure was 10.4) I am using a Wellue SleepU oximeter to track SpO2 - and to alert me via the alarm when it plummets.
Central apnea: The past several months have featured treatment emergent central apnea, especially just after I fall asleep. As soon as I do, my SpO2 just falls off the cliff, and the finger alarm on my SleepU encourages me to start breathing again. If I wake and fall asleep during the night the patterns repeats itself.
I just had my periodic sleep doc checkin, and she (when she saw my uploaded SpO2 traces) said the pattern was classic for treatment emergent central apnea. I have appended a recent trace which shows my record number of finger alarm activations (black triangles) for a sequence.
Sleep doc had me reduce my FLEX setting from 3 to 1. I am tolerating the FLEX change (in terms of exhalation pressure) fine, but am seeing little overall response in central apnea. She said try this for several more months and see if it resolves. Sleep quality is unsurprisingly poor for me - other suggestions for what I should try? I am thinking turning FLEX off altogether as a next test.
Thanks!