Bipap analysis

[mawaw1992]

Sleeprider,

Not to sidetrack CpapGee's post, but you mentioned earlier that his pressures were apparently too high noted by the 700ml tidal volume and that he was over ventilated and that a 540ml was more normal. The reason I ask is that got me to thinking what my tidal volume was because that is something I don't really check when I am reading my card. After checking, my Med Tidal Volume normally runs 640-700ml with my 95% running as high as 920ml. When you mentioned that he was over ventilated, what does that mean and would that make a person feel more fatigued the next day? Should I consider lowering my pressures? Even though my AHI has been averaging 1.0 I normally feel very tired every day.

Thanks,
Mark

[Sleeprider]

Mark, there is wide variation in tidal volume among individuals, and your results actually resemble mine. As I have gotten older, mine has settled in at 600 to 640, but used to be higher. CpapGee had a significant difference in his results depending on his pressure support settings. He had a zero AHI with the 18/13 pressure, but the flow rate looked disrupted with a lot of very heavy (high volume exhale) expiratory breathing compared to when we reduced pressure to effectively 14/10. It's pretty easy to conclude the lower pressure was equally effective, but more comfortable, and that is really what we're after.

[CpapGee]

last nights and tuesdays night screenshots
One thing is my wearable watch show o2 drops significantly arpund 0122 last night, is there anything you can see around this time?
One thing i have noticed is the pressure requirements are much higher in the 2nd half of the night compared to the first half, could this be due to positional changes?

[CpapGee]

screenshots

[CpapGee]

last two nights data. feeling better and napping less then i used too, anything else i can do to improve things?

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more screenshots

[Sleeprider]

Things look very good. On Dec 12, the SpO2 drop at 01:22 seems related to an event that raised pressure. We would need to see a zoomed shot to figure that out. You have brief clusters of obstruction that we can see in the flow limit graphs, and that result in pressure increases. I assume those are positional, but not resulting in full apnea events. You will have to decide if that is worth chasing or if you would rather score the win as-is.

[CpapGee]

see zoomed in screenshots