drjsparker wrote:Below are last nights results... good news/bad news... questions...
I am looking at your curves, and am quite envious of your low AHIs. I see no reason to be concerned about a few apneas ... unless you have complaints about other measures of your sleep quality.
If you insist on interpreting one night's data, and the results are repeating over several nights, than it would be nice to also see detail zoomed in to say a 5 or 10 minute scale.
Comparing with my own experiences on the sequence of events, may I paraphrase some of the advice provided by the other forum members ... for a possible interpretation:
- when you had your titration study, what pressure values were recommended in the report
for this mask and
for various sleep positions? it doesn't look like the lower limit of 6 cm H2O is doing much for you.
- first the flow limitations appear ... maybe due to a REM sleep stage
- then the ResMed S9 Auto starts compensating by raising the pressure; at 12 cm H2O it looks like it suppresses all but a few insignificant obstructive apneas
- you have an increased airway resistance at this point, so the pumped air has to go somewhere: either the mask starts leaking around the seals (if too loose) or you mouth-breathe (your minute ventilation and flow amplitude decreased to maybe 50%); in this eventuality the ResMed S9 Auto algorithm doesn't quite know what to do, so it pushes the pressure up to max ... until the arousals and flow limitations stop (REM stage over or you maybe changed body position)
- looks like the first such sequence woke you up; the second resolved with continued sleep; you're not showing how far down the pressure went
Any chance that you're wearing your nasal mask very loose? In my case going to the nasal pillows was a solution.
Moderate-severe OSA, ResMed S9 AutoSet EPR + H5i Humidifier, ResMed Masks: trying Swift FX Nasal Pillow, Mirage Nasal, Mirage Quatro or Quattro FX Full Face
ResMed SD card & USB adaptor, ResScan 3.10