Congrats on the better results, I hope they stay that way.jonnybee wrote:Last night's ResScan graphs. Settings: Epr OFF; Auto mode w/pressures 8-12. AHI 2.9. Observation: Better control. Clusters less severe. Pressure bumping max in an apparent effort to curtail clusters but max pressure is apparently inadequate to do the job. Some interruption of sleep due to pressure increases causing slight leaks. Plan to try same setting for a couple more nights before increasing pressure to maybe 9-13. I'll report back after a few days.
From looking at your Autoset pressure curve, I see no need to bump Pmax upward. It would be different it P kept hugging the max level for extended time. Note how quickly ResMed raises the pressure, trying to beat apneas to the punch. Then, with no apnea, the pressure decreases asymptotically to Pmin ... until another event is sensed. Also note that after sleep onset your P level pretty much hugged the lower limit.
So was it mainly reducing EPR that helped? I've never played with this parameter. What have we learned? If you look at your past flow cessations in greater resolution, were they happening during the inspiratory (flow curve positive) or expiratory (flow curve negative) phase?
My own current flow curves look somewhat better than what you just showed... in that the anomalies show up only a few times during the night, at a lower amplitude and shorter duration, AHI in the 1-5 range. But they still seem to cause enough sleep fragmentation to affect my total subjective quality of sleep. And I'd be back with the clusters if I stopped the nasal decongestants and / or slept on my back; probably a different cause than in your case, but I suspect the same upper airway instability effect.
P.S. you didn't address my qn on humidifier parameters possibly having an effect. Is your Eastern NC sleeping environment rather warm and humid nowadays?