Doug, interesting, indeed! That gets me to wondering about your transient nasal impedance issues over the years. Is there a possibility that your past "ups and downs" regarding daytime energy might have tracked your periods of high nasal impedance? Do allergy seasons tend to be low energy seasons?dsm wrote:SWS,
Verrry interesting.
I just tried all the Bipaps & with my nose clear and easy to breathe, all the Bipaps are working acceptably - the Pro II did seem a tad more sensitive on the ipap to epep switch but as just tested I would confidently sleep using it.
This brings me to another issue. It seems to me that I have long got used to taking long slow breaths through my nose due to a lifetime of restriction - I am now thinking that with cpap I have been slowly changing my breathing rate & in the past 8 months or so, with the ability to switch nose to mouth with ease, that I can now maintain a higher BPM - the data from the Bipap AutoSV shows BPM (spontaneous) of 14 & 15 bpm as typical.
Allowing for the noticeable improvement with the Bipaps from the tests I just ran, I still can't explain why the other brands did not exhibit the premature ipap to epap that I was finding with the Bipsps specified.
There is a story her, just need to think about it.
DSM
If so, I'm wondering if you essentially suffer UARS-type sleep arousals and UARS-type somnolence primarily or even exclusively during your transient periods of rhinitis. And that begs the question: can there be such a thing as transient UARS? Researchers are still trying to understand whether UARS arousals might be inherently different (perhaps airway receptor based) than apnea arousals (blood-gas receptor based).
And according to some researchers it's possible to have both of those obstructive etiologies and both arousal types happening at the same time. Presumably when your nasal impedance in not problematic you just may not suffer transient UARS type issues in physiology. And that also begs the question of just how severe or perhaps "non-present" your OSA just might be during those recurring periods of acceptable nasal impedance.
Regarding whether an SV machine is your magic pill: I sure hope it is! However, like you I also suspect that "trial by time" will be the true efficacy test. Good luck with that SV machine!!!
P.S. But what a hypothetical question brought to mind: Can UARS be strictly transient and recurring in at least some cases? Hmmm... I don't see why not. Yet I have never read about fully-symptomatic UARS recurring on a seasonal or transient-only basis.
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