How should my 90 % pressure relate to apap setting?

neillebo · Post by **neillebo** » Sun Dec 02, 2007 6:54 am

Hi, all. Ok. a few weeks now on ap and even took it while travelling. I have managed to get myself down to the 2.0-4.0 AHI range.. keeping the pressure steady now from 9-14 for 2 weeks, it shows that my 90% pressure is around 12.. Do I change my settings? Not sure how to use the 90% data, although i understand what it means statistically. some stats below:

9 is used for 30% of night
10 is used for 25% of night
11, 12, 14 each 15% of night

RipVW · Post by **RipVW** » Sun Dec 02, 2007 7:39 am

I've used the 90% pressure number as a guide to set my max pressure--hoping some of our more knowledgeable xPAP'ers will chime in here.

DreamStalker · Post by **DreamStalker** » Sun Dec 02, 2007 7:49 am

Your stats only add up to 70%.

ozij · Post by **ozij** » Sun Dec 02, 2007 7:56 am

DreamStalker wrote:Your stats only add up to 70%.

What did you put in you magic air box, DS?

25 + 30 + 3*15 = 100

That still doesn't make 12 a 90% recommendation; and what happened to 13?

O.

DreamStalker · Post by **DreamStalker** » Sun Dec 02, 2007 8:00 am

ozij wrote:
DreamStalker wrote:Your stats only add up to 70%.
What did you put in you magic air box, DS?

25 + 30 + 3*15 = 100

That still doesn't make 12 a 90% recommendation; and what happened to 13?

O.

It must not have been the good stuff ...

DreamStalker · Post by **DreamStalker** » Sun Dec 02, 2007 8:05 am

ozij wrote:
DreamStalker wrote:Your stats only add up to 70%.
What did you put in you magic air box, DS?

25 + 30 + 3*15 = 100

That still doesn't make 12 a 90% recommendation; and what happened to 13?

O.

0% for 13?

You didn't get the good stuff either ...

sleepie · Post by **sleepie** » Sun Dec 02, 2007 8:08 am

i would move the 9 to 10 and get 55% of the night--leave the other # the same for a week and take a look then----pat

DreamStalker · Post by **DreamStalker** » Sun Dec 02, 2007 8:10 am

neillebo wrote:Hi, all. Ok. a few weeks now on ap and even took it while travelling. I have managed to get myself down to the 2.0-4.0 AHI range.. keeping the pressure steady now from 9-14 for 2 weeks, it shows that my 90% pressure is around 12.. Do I change my settings? Not sure how to use the 90% data, although i understand what it means statistically. some stats below:

9 is used for 30% of night
10 is used for 25% of night
11, 12, 14 each 15% of night

Sorry, back to your question ...

Assumming you have mouth leaks under control (you do don't you?) ... you could try narrowing your range by increasing your min pressure setting to 10 cm.

Yes ... sleepie beat me to it ... what sleepie said.

neillebo · Post by **neillebo** » Sun Dec 02, 2007 8:16 am

sorry. I meant 15 at 11-12 & 13. I also rounded, i have a small % at 14, but not much. I was thinking of raising to 10, but my titration in the lab was 9.. 9 has been my min and i get plenty of events above it, so that is why i have been cautious. If all concur, i like the idea of raising to 10 to see what happens... of courese, that still doesnt answer, if you dont mind, what the 90% pressure means. Even if i didnt have that stat, i would consider raising the band to 10 since i still get an ahi of 2+ and many event at 9... does the 90% pressure tell me to keep the band closer to 12 (bear in mind, for the first week or so, 90% was 13.

Yes,. leaks are ok.. average around 33 each night.. how would a mouth leak show up, btw? does it show as apnea since i wont be breathing through my nose? does it show as a leak? not sure how that works out.

sleepie · Post by **sleepie** » Sun Dec 02, 2007 8:30 am

i run mine 1 point over my 90%---seems to work for me----the extra point for those hard to knock out apneas

DreamStalker · Post by **DreamStalker** » Sun Dec 02, 2007 8:35 am

90% means that is the pressure for which you spent 90% of your time at or below. If you were going to set it to straight CPAP mode, that would be a good number to set it at. I was titrated at 10 but a year's worth of data suggests 11.5 or 12 based on my 90% stat.

If you had a mouth leak, you would have a leak rate higher than what is desiganted for your mask.

Apneas may be correlated to high leak rates on your nightly data using the software ... however, it is possible to have apneas without it being associated with a high leak too.

neillebo · Post by **neillebo** » Sun Dec 02, 2007 8:39 am

I'm not sure i follow how a mouth leak will be evidenced by higher leak than my mask is rated. My mask is rated around 30 and i leak around 33.. I have been assuming that i am NOT mouth leaking and that this is a leak around my nose when i turn over, etc.... I konw a mouth leak would also cause the pressure leak to rise, but I am trying to figure out if there is a way to tell if i really have any mouth leaks??

neillebo · Post by **neillebo** » Sun Dec 02, 2007 8:41 am

Posted: Sun Dec 02, 2007 9:30 am Post subject: Delete Spam

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i run mine 1 point over my 90%---seems to work for me----the extra point for those hard to knock out apneas
_________________

Sleepy, when you say you run it 1 point over, is that in cpap mode or apap? meaning you put your MAX pressure at 1 level above the 90%? where do you put min in relation to 90%?

Guest · Post by **Guest** » Sun Dec 02, 2007 8:42 am

if you mouth leak it generally shows up as a large leak---but not always---stay within 10 of your exhaust rate for your mask and i think it works--at least for me-----pat

Sleepdeprived · Post by **Sleepdeprived** » Sun Dec 02, 2007 8:59 am

Hi

I was titrated at 9 cm

My 90 % was around 13

by best results are from straight cpap at 9

Apap and 90 % pressure does not always give the you
the best therapy

I am now down to .4 AHI for the week on cpap when my apap was over 5

It was Snoredog who first suggested to me I might be better off on straight cpap several months ago

Experimentation is often needed to find ones sweet spot

I experienced improved therappy not only with cpap vs apap but also in going from the Bravo to the Swift to the Nassal Aire II

Also with poligrip strips, no humidity vs humidity (I live in a humid place,) pantyhose tights , pursleep, melatonin and am now experimenting with the pappillow

Find your best results and if it is consistently at one pressure you might want to do straight cpap

and then tweak you therapy by other factors

Sleepdeprived

[quote="neillebo"]Hi, all. Ok. a few weeks now on ap and even took it while travelling. I have managed to get myself down to the 2.0-4.0 AHI range.. keeping the pressure steady now from 9-14 for 2 weeks, it shows that my 90% pressure is around 12.. Do I change my settings? Not sure how to use the 90% data, although i understand what it means statistically. some stats below:

9 is used for 30% of night
10 is used for 25% of night
11, 12, 14 each 15% of night

How should my 90 % pressure relate to apap setting?

How should my 90 % pressure relate to apap setting?

Re: How should my 90 % pressure relate to apap setting?

Re: How should my 90 % pressure relate to apap setting?