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Central Apnea - What's normal?
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jshu43 Offline

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Post: #1
Central Apnea - What's normal?
Just got the results from my initial sleep study. My AHI is mild - 10.2

But I also have a RDI of 51.6. Is that number significant.

I had 3 Obstructive; 73 Hypopneas, 0 Mixed; and 8 Central. 339 RERA's (In 8 hours)

With all the RERA's would UARS enter the picture?

I am interested in the Central Apneas. While it's only 8 - is this something I should look into?

My lowest oxygen saturation 87.0 But on a graph that was labaled Oximetry Trend Graph - its got maximum, mean & minimum Sa02%. Under the minimum graph, it starts out with 76.0. Not sure what that means.
12-25-2013 01:08 AM
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DOOM_NX Offline

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Post: #2
RE: Central Apnea - What's normal?
Hello and welcome!

I wouldn't worry about it yet. Will you get a machine? Try using it for a month see what CAI you get. My CAI has lowered a lot after using Auto-CPAP.
12-25-2013 01:36 AM
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zonk Offline

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Post: #3
RE: Central Apnea - What's normal?
RERA does not met the definition of an apnea but with so many frequents arousal can wreck your sleep even more than few apneas
Normally RDI associated with excessive daytime sleepiness

Flow Limitation/UARS and BiPAP
http://www.apneaboard.com/forums/Thread-...-and-BiPAP
12-25-2013 03:51 AM
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jshu43 Offline

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Post: #4
RE: Central Apnea - What's normal?
Is there some kind of measurement of Central Apnea like Obstructive Apnea? 5-15 mild, etc.

Also RDI - what index number would be severe?
12-25-2013 09:28 AM
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trish6hundred Offline

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Post: #5
RE: Central Apnea - What's normal?
Hi jshu43,
WELCOME! to the forum.!
Hang in there for more suggestions and best of luck to you.

trish6hundred
12-25-2013 01:01 PM
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DOOM_NX Offline

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Post: #6
RE: Central Apnea - What's normal?
(12-25-2013 09:28 AM)jshu43 Wrote:  Is there some kind of measurement of Central Apnea like Obstructive Apnea? 5-15 mild, etc.

Also RDI - what index number would be severe?

The AHI index includes both obstructive and central apneas. There is no separate index classification.

The RDI category ranges are the same with AHI; 5-15, 15-30, 30+.
(This post was last modified: 12-25-2013 02:35 PM by DOOM_NX.)
12-25-2013 02:34 PM
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zonk Offline

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Post: #7
RE: Central Apnea - What's normal?
(12-25-2013 09:28 AM)jshu43 Wrote:  Is there some kind of measurement of Central Apnea like Obstructive Apnea? 5-15 mild, etc.

Also RDI - what index number would be severe?
There is no separate measurement of central apnea, AHI includes all types of apnea events (not RERA)
Apnea hypopnea index (AHI)
http://www.apneaboard.com/wiki/index.php?title=AHI

Respiratory disturbance index (RDI)
http://www.apneaboard.com/wiki/index.php?title=RDI

RDI = (RERAs + Hypopneas + apneas) / TST (in hours). That is, RDI means the average number of episodes of apnea, hypopnea, and respiratory event-related arousal per hour of sleep. (TST is "total sleep time".)
(This post was last modified: 12-25-2013 03:00 PM by zonk.)
12-25-2013 02:45 PM
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vsheline Offline

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Post: #8
RE: Central Apnea - What's normal?
(12-25-2013 01:08 AM)jshu43 Wrote:  Just got the results from my initial sleep study. My AHI is mild - 10.2

But I also have a RDI of 51.6. Is that number significant.

Yes, your large RDI of 51.6 is very significant. It is "severe".

The optimal machine for you would likely be a bi-level Auto machine like the Philips Respironics System One BiPAP Auto Bi-Flex with Heated Tube humidifier (if in USA this is called model DS760TS). Or the ResMed S9 VPAP Auto.

Again reposting the link given in Zonk's post to the excellent article by Dr Krakow:
http://www.apneaboard.com/forums/Thread-...-and-BiPAP

The number of centrals you had were small and probably nothing to worry about. Especially so, if the centrals lasted a short time, like under 30 seconds each, or occured when you were not fully asleep. Having some centrals while falling asleep is considered normal and these may have been (but maybe should not have been) included in the AHI and RDI.

Unlike obstructive apneas, as soon as you try to breathe a central apnea ends.

However, if you start having more or longer centrals, or are taking pain medications such as opiates, an Adaptive Servo Ventilator (ASV) class machine may become optimal for you.

Take care,
--- Vaughn

Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.
(This post was last modified: 12-25-2013 11:21 PM by vsheline.)
12-25-2013 11:09 PM
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physicsstudent13 Offline

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Post: #9
RE: Central Apnea - What's normal?
I think the asv is the only thing that helps my centrals and klonopin. is there any chance losing weight would reduce centrals?
12-29-2013 06:12 AM
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DeepBreathing Offline
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Post: #10
RE: Central Apnea - What's normal?
(12-29-2013 06:12 AM)physicsstudent13 Wrote:  I think the asv is the only thing that helps my centrals and klonopin. is there any chance losing weight would reduce centrals?

We're not qualified to give advice on drugs. You should see your doctor.

DeepBreathing
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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.
12-29-2013 07:29 AM
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