MikeNarwhal

Thanks for this, reviewing with interest.

"Was there a reason why you were switched from the AirSense 10 AutoSet to the AirCurve 10 VAuto?" I'm a little unclear on that, although I think my inability to get a good seal led to an extremely tight mask which led to an inability to get more than four hours per night.... and it was suggested to me by the fitting technician that the whole new machine was unnecessary and issue might have been resolved by a better mask!!!!

Be that as it may, the old cpap machine was 3G so the doc couldn't see my numbers easily, and for reasons I'm not aware of he suggested that BiPAP might be helpful in my case. I'm not clear on reasoning there, but at least now with the 4G bipap machine I can discuss my numbers with him after he views them remotely. I have scheduled an appointment to do that.

What you are saying I think is "no, events should not be greater under BiPAP than CPAP" which was my basic question.

The doc said that people's prescription does sometimes change, and so I accepted that the lower pressure (13 or 12.8) might reflect the new finding in the sleep study. But I think you are suggesting that in fact the lower inhalation pressure might be creating more events.

And I'd add that I think that my previous CPAP inhalation pressure was actually 18, not 15, which is substantially higher than the 13 or 12.8 that my new machine is set at. Perhaps that explains the high events/hour with the new machine. I'll discuss it immediately with my doctor. I'm quite comfortable with a higher pressure, and I was a little surprised that my recent study came back with just a 13 recommendation.

Of course I worry that if the pressure goes up, then the tightness has to increase, and then I won't be able to tolerate the mask for as many hours. But I'll cross that bridge if the doctor recommends increasing the pressure at least to the level that the previous sleep study from 5 years ago put me at, around 18 (if I recall correctly).

Thanks for the info, and for the manual which I'm reading with interest.

Thanks, and sorry about the inexactitude on my part.

The CPAP machine was "Resmed AirSense 10 autoset" and was set to something like 10 low/ 15 high (if I recall correctly.)

The new BiPAP machine is "Resmed AirCurve 10 vauto" (that's the tag on the carrying case)... but the picture inside suggests that it is part of the AirSense 10 series) (as distinct from another picture that shows the "S9 series" which this is not an example of.)

The manual is for the AirCurve 10. The tag on the bag supports it being the "vauto" model.

The report screen shows 8.8 low and 12.8 high (which I presume is based on the recent sleep study I did. My understanding is that that is exhale and inhale maximum pressure? I recall that the sleep technician told me that my max pressure to open my airway was about 13 (what are the units we are talking about by the way?)

I did achieve around 5 events per hour with the old machine. The new one has produced three nights of 20, 20 and 17 on first three nights of use).

In spite of that, I am sleeping better because the new airfit F30 mask is so much more comfortable without the pressure on my nose bridge.

Does that provide you with helpful info? Thanks!

I just transitioned from a Resmed CPAP machine to a Resmed BiPAP (Airsense10) machine. I was registering 4 to 6 events per hour on the CPAP device, and now after three nights I'm getting 20 events per hour with BiPAP. Why might this be?

Does the BiPAP machine register events differently or more sensitively?

I also changed mask types to from Airfit f20 (CPAP) to Airfit F30 (BiPAP). Could this have changed the number of events?

I feel like the fit is better, I'm sleeping MUCH longer with the mask (4 to 5 hours before under CPAP, 7 to 8 hours comfortably now.)

I was told with CPAP that the goal was under 5 events per hour. Presumably that is still the goal with BiPAP? Or is it?

So what might be going on with the apparent increase in events using a BiPAP with a new (and seemingly better) mask?

17 to 20 events per hour is a little worrisome... or maybe it was always there but the CPAP machine was only partly registering them?

Thanks!