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Webbie73 Offline

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Posts: 32
Joined: Aug 2014

Machine: Resmed 9 auto
Mask Type: Nasal pillows
Mask Make & Model: Res med air fit p10
Humidifier: Resmed
CPAP Pressure: 8-14
CPAP Software: Not using software

Other Comments:

Sex: Female
Location:

Post: #1
AHI
When checking my AHI in the morning I am finding ( I think )central apneas.
Example
AHI 2.5
AI 2.1
central AI .1

Does this mean I am having central apneas? If so, should I be concerned?
09-03-2014 10:41 AM
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retired_guy Offline

Preferred Members-2

Posts: 2,744
Joined: Jan 2014

Machine: ResMed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: ResMed
CPAP Pressure: 10.6/14, EPR 3
CPAP Software: ResScan SleepyHead

Other Comments: Is it bedtime yet?

Sex: Male
Location: Beautiful, albeit very wet Oregon Coast

Post: #2
RE: AHI
Nope. Not according to those numbers. They look just fine. Now the thing about centrals: they kind of get a bad rap around here. They really aren't any more weird than obstructives. We want to control them, keep them to a minimum or completely gone away even, but we're always going to see some. And, not all centrals are equal. The machines can and often report a central event when it is not actually a central apnea event.

So, relax and sleep well. You're doing great.
09-03-2014 10:54 AM
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trish6hundred Offline

Advisory Members

Posts: 6,424
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
Hi Webbie73,
What R_G said.
Sounds like you are off to a good start, just keep on goin'.

trish6hundred
09-03-2014 12:16 PM
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NickDanger Offline

Preferred Members

Posts: 91
Joined: Jun 2014

Machine: Resmed S9 Autopap
Mask Type: Nasal pillows
Mask Make & Model: ResMed P10
Humidifier: 5i
CPAP Pressure: 9
CPAP Software: ResScan SleepyHead

Other Comments: ResMed Chinstrap

Sex: Male
Location:

Post: #4
RE: AHI
Agree with the above: 0.1 = no problem. 1.0 = no problem. 5.0 = maybe a problem (but may not actually be central apneas). CPAPs do a decent job of distinguishing central apneas from obstructive apneas, but they aren't perfect. They frequently get confused by irregular breathing while awake or while on the border between sleeping and waking. So, if you had 50 to 100 times as many CAs showing up, then you'd want to look closely at your detailed data (using SleepyHead or ResScan software) to examine the patterns of your events. At 0.1 CAs and 2.5 AHI, it really isn't worth spending time on the analysis if you are feeling better. (My numbers are actually a little bit better than yours, but I still like looking at the pretty graphs - but then, I'm a math/science geek).

Great start!!!
(This post was last modified: 09-04-2014 09:09 AM by NickDanger.)
09-04-2014 09:02 AM
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herbm Offline

Preferred Members-2

Posts: 852
Joined: Jan 2014

Machine: ResMed AutoSet S9
Mask Type: Oral
Mask Make & Model: ResMed Airfit P10 Nasal Pillow
Humidifier: ResMed H5i
CPAP Pressure: 11-16
CPAP Software: ResScan SleepyHead

Other Comments: Backup Mask: Innomed Hybrid FFM -- Oral+Nasal Pillows

Sex: Male
Location: Austin, TX

Post: #5
RE: AHI
Everyone else is correct. 0.1 is practically nothing. 2.5 is excellent (even were it all CAs, but it isn't).

You are doing great, if those numbers hold just keep on doing what you are doing.

Sweet Dreams,

HerbM
Sleep study AHI: 49 RDI: 60 -- APAP 10-11 w/AHI: 1.5 avg for 7-days (up due likely to hip replacement recovery)

"We can all breathe together or we will all suffocate alone."
09-04-2014 11:13 PM
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Ghost1958 Offline

Advisory Members

Posts: 957
Joined: Aug 2014

Machine: PRS1 Series Sixty Auto Aflex
Mask Type: Nasal mask
Mask Make & Model: F&P Eson
Humidifier: PRS1 with Heated Hose
CPAP Pressure: 10.5 min 16 max
CPAP Software: SleepyHead EncoreBasic

Other Comments: Moderate to Severe SA Obstructive. Rapid O2 desat off the machine.

Sex: Male
Location: KY

Post: #6
RE: AHI
ive noticed both sleepy head and encore with my machine will show occasional CAs right over a perfect waveform where nothing was going on at all except steady breathing. One software is a bit worse for doing that than the other one.
09-04-2014 11:30 PM
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