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AhI Differences
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Hussy Offline

Members

Posts: 4
Joined: Jun 2015

Machine: Resmed Airsense elite
Mask Type: Nasal pillows
Mask Make & Model: Air fit 10 for her
Humidifier: built in
CPAP Pressure: 4-6
CPAP Software: Not using software

Other Comments:

Sex: Female
Location:

Post: #1
AhI Differences
hi this is my first post. I just want to know if I have a problem. When I sleep well and have no problems with my mask then my AHI is about 3.4. However when I have a bad night it is 1.6! Is that because I am sleeping more deeply when it is 3.4?
07-06-2015 06:32 PM
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justMongo Offline

Monitors

Posts: 3,844
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #2
RE: AhI Differences
You have to define a "bad night."
If a bad night is disrupted by mask leaks, then the machine may not be able to detect some events.

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
07-06-2015 06:46 PM
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trish6hundred Offline

Advisory Members

Posts: 6,430
Joined: May 2012

Machine: Resmed S9 AutoSet for Her
Mask Type: Full face mask
Mask Make & Model: Fisher & Paykel Simplus
Humidifier: H5i Heated Humidifier
CPAP Pressure: 10 - 7-20 Cm H2O
CPAP Software: Not using software

Other Comments: I started CPAP in 2008. Totally blind since birth.

Sex: Female
Location: Missouri, USA

Post: #3
RE: AhI Differences
Hi Hussy,
WELCOME! to the forum.!
Hang in there for more answers to your questions and much success to you with your CPAP therapy.

trish6hundred
07-06-2015 10:04 PM
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Hussy Offline

Members

Posts: 4
Joined: Jun 2015

Machine: Resmed Airsense elite
Mask Type: Nasal pillows
Mask Make & Model: Air fit 10 for her
Humidifier: built in
CPAP Pressure: 4-6
CPAP Software: Not using software

Other Comments:

Sex: Female
Location:

Post: #4
RE: AhI Differences
Just mungo. I suppose When I have a bad night . I mean when I am waking up frequently
07-07-2015 05:40 PM
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TyroneShoes Offline

Preferred Members-2

Posts: 505
Joined: Oct 2014

Machine: Resmed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10
Humidifier: Resmed H5i
CPAP Pressure: 10-14
CPAP Software: SleepyHead

Other Comments:

Sex: Undisclosed
Location:

Post: #5
RE: AhI Differences
AHI tells you how many events you had (per hour), period. It does not tell you the severity of events, nor does it tell you the makeup of events. This is a good reason to understand the differences and to use SleepyHead software to parse your data so that you have a less-fuzzy idea of what is going on.

Events disturb your sleep, to some extent, which varies. Some cause a partial arousal that you never even know about; some cause a full arousal. An identical event can arouse one person and not another. It can cause a greater O2 desat for one person that it might for another. I am not sure about this, but possibly not all arousals can be found to have a causal link to an apneic event. IOW, there may be other reasons (barking dog? Cats fu,...err...fighting?).

So while AHI is good for giving us a simplified metric regarding how we are doing, it is not very accurate, other than it flags each event and counts it. But sleep and SA are much more complex than that, so how you are really doing is also much more complex than AHI.

If you have arousals, you should research RERA. I do not have arousals and my APAP does not flag them, so I am probably not much help in that area. Others on the forum know a great deal more than I do.
(This post was last modified: 07-07-2015 06:12 PM by TyroneShoes.)
07-07-2015 06:10 PM
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zonk Offline

Advisory Members

Posts: 7,908
Joined: Feb 2012

Machine: A10 AutoSet
Mask Type: Nasal mask
Mask Make & Model: Activa LT
Humidifier: Integrated /ClimateLineAir
CPAP Pressure: 9/13
CPAP Software: ResScan

Other Comments: CPAP since Nov 2010

Sex: Male
Location: Australia

Post: #6
RE: AhI Differences
(07-06-2015 06:32 PM)Hussy Wrote:  However when I have a bad night it is 1.6! Is that because I am sleeping more deeply when it is 3.4?
Sleeping more deeply might result in more events but machine with optimal settings ought be preventing them

Profile: Resmed Airsense elite - CPAP Pressure: 4-6
AirSense 10 Elite is fixed pressure machine, not APAP
07-07-2015 06:17 PM
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