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Does your AHI vary when you change masks?
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old dude Offline

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Posts: 46
Joined: Jul 2013

Machine: PR System One BiPap Auto Bi-Flex 760P
Mask Type: Full face mask
Mask Make & Model: RM Quattro Mirage, Quattro Air, Quattro FX
Humidifier: PR System One HT DS6TFLG
CPAP Pressure: 15/11
CPAP Software: SleepyHead EncoreBasic

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Sex: Male
Location: N. Ga. & FL. Panhandle

Post: #1
Does your AHI vary when you change masks?
Often if I've been using a particular FFM for a while but then change abruptly to a different FFM to give my nose a rest for a few nights, I'll get an uptick in AHI readings-say from around 2.0 to as much as 4.0. The variation is always upward-never down. After a couple of nights it seems that I acclimate to the new mask and my AHI levels return to normal for me.

No other variables of (of which I'm aware) will have changed, and even leak levels usually remain the same across different masks.

Is this likely actually due to changing masks, or is it just a fluke that I should ignore? And as long as my AHI is under 5.0 do I need to worry about the difference between a 1 and a 5 in the first place?

It's hard not to "chase" better numbers...
09-03-2013 09:41 AM
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PaulaO2 Offline
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Posts: 8,068
Joined: Feb 2012

Machine: S9 Autoset
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: H5i
CPAP Pressure: 14-20
CPAP Software: SleepyHead

Other Comments: Ehlers-Danlos Syndrome, Hypermobility Type; chronic sarcasm

Sex: Undisclosed
Location: western NC, USA

Post: #2
RE: Does your AHI vary when you change masks?
Yes, it can change. At least mine does.

My theory is it is different so we sleep different. Maybe it is not as comfortable so we don't sleep well or we sleep in a different position. Or it is more comfortable so we sleep deeper which equals more relaxed which equals higher AHI.

And it is very hard to not chase the numbers! I want to tweak all I can to squeeze out the best I can get.

In this case, though, forget the AHI and concentrate on how you feel. If you feel the same, then move along, nothing to tweak here. But if you feel worse (or better), then you will want to look into the why.

PaulaO2
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09-03-2013 01:36 PM
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