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Leaks with low AHI
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app1nag Offline

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Machine: resmed airsense 10 auto
Mask Type: Nasal pillows
Mask Make & Model: Swift
Humidifier: same as machine
CPAP Pressure: 10-20
CPAP Software: ResScan SleepyHead

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Sex: Male
Location: 10956

Post: #1
Leaks with low AHI
I know I should be concerned about leaks but I am still getting <2 AHI each night. Is the AHI index still accurate despite a high rate of leakage? I've been on therapy less than a week and will be making adjustments as I progress with the device. I believe leaks are coming from opening my mouth and not a poorly fitted mask. As a hypothetical, if my mouth stays open all night yet my AHI is still <2, does that mean therapy is still working, or is the AHI a false reading because of the high leakage?

thanks !
12-07-2015 08:06 AM
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app1nag Offline

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Posts: 29
Joined: Dec 2015

Machine: resmed airsense 10 auto
Mask Type: Nasal pillows
Mask Make & Model: Swift
Humidifier: same as machine
CPAP Pressure: 10-20
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: 10956

Post: #2
RE: Leaks with low AHI
(12-07-2015 08:06 AM)app1nag Wrote:  I know I should be concerned about leaks but I am still getting <2 AHI each night. Is the AHI index still accurate despite a high rate of leakage? I've been on therapy less than a week and will be making adjustments as I progress with the device. I believe leaks are coming from opening my mouth and not a poorly fitted mask. As a hypothetical, if my mouth stays open all night yet my AHI is still <2, does that mean therapy is still working, or is the AHI a false reading because of the high leakage?

thanks !

forgot to mention, my Airsense gives me a smiley face in the morning even though I am seeing high leakage #s in Sleepyhead.
12-07-2015 08:23 AM
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DeepBreathing Offline
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Machine: Resmed S9 VPAP Adapt
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: Resmed H5i
CPAP Pressure: EPAP: 9 - 15 PS: 3 - 10
CPAP Software: ResScan SleepyHead

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Sex: Male
Location: Perth, Western Australia

Post: #3
RE: Leaks with low AHI
Resmed machines can nominally compensate for a leak up to 24 L/min. Above that you can't place any reliance on the AHI reading.

DeepBreathing
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12-07-2015 08:24 AM
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Gabby Offline

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Machine: ResMed AirSense 10 AutoSet For Her
Mask Type: Nasal pillows
Mask Make & Model: Philips Nuance Nasal Mask
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CPAP Pressure: 8-14
CPAP Software: SleepyHead

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Sex: Female
Location: Sunshine Coast, Qld., Australia.

Post: #4
RE: Leaks with low AHI
This is where I am confused because I get 2 and below for my AHI's my leaks are always from 6 to mid teens, I have never had a red face and I would say most of my leaks are from my mouth, note, I do wear a chinstrap.
But and its a big but, I am still extremely tired every day and this has been going on for nearly two years now.
So even though I have leaks all night long because they don't get to 24, no red face?
AHI is good so I just continue as I am and being exhausted every day.
Sleep Dr. said everything was fine. Said he couldn't do anymore for me.

Sorry app1nag for butting in here, you're a newbie and I'm an oldie but im still confused.
Good luck on your Cpap journey.

Sleep Tight...
Gabby
12-12-2015 07:33 PM
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cate1898 Offline

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Posts: 784
Joined: Aug 2015

Machine: PR System One 560BT Auto
Mask Type: Nasal pillows
Mask Make & Model: P10's/backup-DreamWear
Humidifier: PR attached
CPAP Pressure: 8.5 - 13. A-Flex 3
CPAP Software: SleepyHead

Other Comments: Began CPAP Therapy Sept. 11, 2015. Hx Hypertension, Post Graves Disease, chronic migraines.

Sex: Female
Location: Southern Ontario//SW Florida

Post: #5
RE: Leaks with low AHI
Hi Gabby, have you ever tried a FFM? Just wondering if that is what you really need or would help your leak rate?

APNEABOARD - A great place to be if you're a hosehead!! Rolleyes

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EVERY ACCOMPLISHMENT BEGINS WITH THE DECISION TO TRY!
12-12-2015 07:36 PM
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rleonard Offline

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Machine: ResMed Airsense 10
Mask Type: Nasal mask
Mask Make & Model: Circadiance Sleepweaver Advance
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CPAP Pressure: 10cm with 3cm EPR
CPAP Software: Not using software

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Sex: Male
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Post: #6
RE: Leaks with low AHI
I know I am late to this tread but will give it a try anyway. I was wondering the same thing as APP1Nag. Last night my Resmed recorded a leak of 30LPM yet my AHI was only .7. I know I need to work on the leak but if my AHI was .7 then is my therapy still more than adequate?
01-26-2016 01:46 PM
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GPSMapNut Offline

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Joined: Nov 2015

Machine: DreamStation Auto
Mask Type: Nasal pillows
Mask Make & Model: Resmed AirFit P10 and PR DreamWear
Humidifier: DreamStation + heated hose
CPAP Pressure: 9-16
CPAP Software: SleepyHead EncorePro Other Software

Other Comments: Used Respironics REMstar Pro with C-Flex for 11 years and ResMed S9 Elite loaner for 3 months

Sex: Male
Location: Mississauga, ON, Canada

Post: #7
RE: Leaks with low AHI
From my limited experience, ResMed is conservative with flagging events and to top it off, the higher the leak, the easier for the machine (any brand) to miss an event.

Everything I post on this board is nothing more than an opinion expressed by an apneak. Normally, it's based on facts and experience but sometimes, I may get things wrong or not have all the facts.
I reserve the right to change my mind. Why? Because tomorrow I may know better.
01-26-2016 03:07 PM
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Inspired Offline

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Sex: Undisclosed
Location: planet earth

Post: #8
RE: Leaks with low AHI
Here are examples of low AHI but problematic leaks, which keep me working on this...I see improvement but once leaks are better I'll trust the AHI.

Fourth day on Cpap:
[attachment=2077]

After adding chinstrap 3 days later:
[attachment=2078]

After changing to Dreamwear nasal mask:
[attachment=2079]


Am going to try side sleeping only...more work to do!

Inspired
Bigwink
01-26-2016 06:51 PM
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rleonard Offline

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Machine: ResMed Airsense 10
Mask Type: Nasal mask
Mask Make & Model: Circadiance Sleepweaver Advance
Humidifier: Resmed ClimateAir
CPAP Pressure: 10cm with 3cm EPR
CPAP Software: Not using software

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Sex: Male
Location:

Post: #9
RE: Leaks with low AHI
Interesting analysis. Looks like you are getting somewhere and you definitely have been through worse than I have. What mask were you using before the Dreamwear?

The leak rate I mentioned of 30LPM occurred with my Dreamwear mask. What I can't figure out is why I do not feel any leaks and I feel okay in the morning? When I switch back to my Sleepweaver Advance mask I have very few if any leaks whatsoever and my events are similar to those on my Dreamwear (average only 1.52 overall). I like the Dreamwear for the hose connection on top but I have a hard time breathing in it. My initial sleep study suggested a pressure of 6cm but with the Dreamwear I was suffocating. it wasn't until I ramped it up to 10cm with EPR of 3cm that I could actually breath normal. I did notice last night that my leak problem is related to mouth leaks. Seems that pressure builds up and my nasal passages are too narrow to handle the exhale so it is forced out of my mouth. My allergies are a problem right now which may be causing a narrowing in my nasal passages. The Sleepweaver's construction doesn't seem to create this problem as the pressure surrounds my nose rather than goes straight into my nostrils.

Thank you for discussing this problem with me. Looks like we both have some work to do. I have finally been able to learn to sleep on my side using a cpap pillow on top of my regular pillow. It takes the pressure off of the shoulder.
01-27-2016 09:40 AM
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PaytonA Offline
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Machine: ResMed S9 VPAP Auto
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CPAP Pressure: VAuto MinE14.0 MaxI 20.6 PS4.0
CPAP Software: ResScan SleepyHead

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Location: Orange County,California

Post: #10
RE: Leaks with low AHI
rleonard,

I do not think that narrowing of your nasal passages is the problem. Many of us can suffer from "chipmunk cheeks" resulting in air being expelled from our mouths. It stems from not sealing one's mouth off from one's airway. The solution is what we call the tongue seal. By pressing your tongue against the roof of your mouth, you can seal the mouth from the wirway and eliminate mouth breathing/leaks. The trick is getting your body to maintain this seal while you are asleep. Some of us have trained our body to maintain this seal by practicing it a lot while awake. A chin strap can help to make this easier and also kind of remind your body while asleep that you need to maintain the seal.

If you are not able to make this work for you, a full face mask would solve the therapeutic problem. Some people hate FFMs and some like them but it is a solution.

Best Regards,

PaytonA
01-27-2016 11:50 AM
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