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[Treatment] Link between mask seal and AHI
#1
I am happy with my Autosense 10 and Dreamwear.  My mask seal is always good (about half the time it is unmeasurable), and my AHI is almost always <1.0.  Maybe once a  month it goes a fraction above 1.0.

My wife, on the other hand, has the Autoset version.  Once she falls asleep, her mask seal is between 20 - 30 L/min.  But her AHI is less than 4.0.  When she falls asleep w/o her mask, I do not hear any apnea episodes (they used to be dramatic and frequent).  Naturally, I can't tell about her hypopnea.

Is there really a strong link between mask seal and AHI??? 

Thinking-about
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#2
(04-16-2017, 01:45 PM)wiscman Wrote: I am happy with my Autosense Airsense 10 and Dreamwear.  My mask seal is always good (about half the time it is unmeasurable), and my AHI is almost always <1.0.  Maybe once a  month it goes a fraction above 1.0.

My wife, on the other hand, has the Autoset version.  Once she falls asleep, her mask seal is between 20 - 30 L/min.  But her AHI is less than 4.0.  When she falls asleep w/o her mask, I do not hear any apnea episodes (they used to be dramatic and frequent).  Naturally, I can't tell about her hypopnea.

Is there really a strong link between mask seal and AHI??? 

Thinking-about

Welcome

I have to assume you mean her leak level is between 20 - 30 L/min.  At that level, detection of events becomes problematic.
Her mask is either not properly fitted for her; or, not a good choice. If she is using a nasal or pillows mask, the leak may be because her mouth is open.
(You should be able to hear that.)

So, as to the question: "Is there really a strong link between mask seal and AHI?"  The answer is not clear-cut.  A leaking mask should deliver therapy and the machine detect events up to a certain leak limit.  When you get into 20 - 30 LPM leak, efficacy of therapy suffers and event detection becomes unreliable.

The bottom line is: fix those leaks.
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#3
During a high leak event, the machine cannot properly determine when an event is happening. They work by detecting the flow rate and by sending air pulses. A leak will counter act both of those as the feedback the machine is getting isn't accurate. Any events detected during a high leak could be false readings. Or could be true. And there could be other events not marked.

Have her fix her mask issues and see what happens.
PaulaO2
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#4
Hi wiscman,
WELCOME! to the forum.!
Good luck to you and your wife with your CPAP therapy.
Hang in there for more responses to your post.
trish6hundred
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#5
Thank you all.  Now, to fix that leak.
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