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From: GB on 12 Jul 2008 07:10
>>> The goal is to have an AHI of 5 or less.
>>
>>How many people achieve that? I rarely do, although I am never quite sure
>>whether the machine gets confused by mask leaks?
>>
>>
>
>
> I do . my AHI without pressure is in excess of 89 and I have over
> 550 combined events , average , per night , never entering REM sleep.
>
> with my Adams Circuit nasal mask my Encore Pro software says my
> AHI is .7 to .9 with an occasional night of 1.1 to 1.3 . I had to
> go through a half a dozen kinds of masks and buy an Autopap
> / Encore Pro to finally get this type of results though.
>
> with a full face mask , I never get lower AHIs than about 11 - 15
> or so, but different people will get different results. these are
> just my own experiences.

Interesting. I just don't see why the mask interface should make a
difference to the AHI?


From: Andy Hall on 12 Jul 2008 07:55
On 2008-07-12 12:10:35 +0100, "GB" <NOTsomeone(a)microsoft.com> said:

>>>> The goal is to have an AHI of 5 or less.
>>>
>>> How many people achieve that? I rarely do, although I am never quite sure
>>> whether the machine gets confused by mask leaks?
>>>
>>>
>>
>>
>> I do . my AHI without pressure is in excess of 89 and I have over
>> 550 combined events , average , per night , never entering REM sleep.
>>
>> with my Adams Circuit nasal mask my Encore Pro software says my
>> AHI is .7 to .9 with an occasional night of 1.1 to 1.3 . I had to
>> go through a half a dozen kinds of masks and buy an Autopap
>> / Encore Pro to finally get this type of results though.
>>
>> with a full face mask , I never get lower AHIs than about 11 - 15
>> or so, but different people will get different results. these are
>> just my own experiences.
>
> Interesting. I just don't see why the mask interface should make a
> difference to the AHI?

It shouldn't unless the leak is so bad that a fixed pressure machine
can't maintain the pressure any longer, or an auto machine's algorithm
is compromised by excessive leak.

I understand that FFMs are more prone to leak.

Keep in mind as well that AHI comprises the HI and AI components and
that hypopnoea begins at 75% reduction in ventilation.

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