Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account


New Posts   Today's Posts

SleepyHead - What is a 'Clear Airway' Event?
#1
SleepyHead - What is a 'Clear Airway' Event?
Can't seem to find a clear definition of a what a Clear Airway event is in SleepyHead? I've looked through the help browser in SleepyHead but it isn't defined there and google searches seem to produce conflicting definitions of what that is depending on the source. It appears from my layman's review of the data that clear air happens at the end of some kind of disruption but what kind? Central apnea? Or is that even close a definition?


Attached Files Thumbnail(s)
   
Post Reply Post Reply



Donate to Apnea Board  
#2
RE: SleepyHead - What is a 'Clear Airway' Event?
Clear Airway is a Central Apnea, but not monitoring effort or brainwaves ResMed decided to call it a "Clear" or "non-obstructed" Apnea
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter 
OSCAR

Download OSCAR
New to Apnea? Helpful tips to ensure success
Mask Primer
Dealing with a DME
Organize Charts
Attaching Charts

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.
Post Reply Post Reply
#3
RE: SleepyHead - What is a 'Clear Airway' Event?
Central apnea and clear airway apnea can be considered, more or less, to be synonymous. A true central apnea can be detected during a sleep study, a chest belt reveals no effort to breathe. A CPAP machine is not sophisticated enough to do what is done in a sleep study. A CPAP machine can, when an apnea occurs, attempt to determine if the airway is open. It does this by sending pressure pulses into your airway and looking at how it responds.
Sleepster
Apnea Board Moderator
www.ApneaBoard.com


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.
Post Reply Post Reply
#4
RE: SleepyHead - What is a 'Clear Airway' Event?
Ah, okay. Thank you. See now that when you hover over the charts on the left side there are descriptions that explain each element in the graph. Clear Airway = An apnea where the airways is clear or translated for me: An apnea that is not caused by obstruction but rather the possibility that it could be a Central Apnea event.
Post Reply Post Reply



Donate to Apnea Board  
#5
RE: SleepyHead - What is a 'Clear Airway' Event?
Further, the CA's are often spurious for most of us if they are both infrequent and of short duration, say under 14 seconds.  The machine senses no effort to breathe, and eventually it registers the 'neglect' as a CA incident, but what really happened in all likelihood is that you simply began to awaken, then to turn your body, you relaxed, and fell asleep again, but you held your breath while doing all this...something exceedingly common across PAP users and most people.
Post Reply Post Reply
#6
RE: SleepyHead - What is a 'Clear Airway' Event?
Thank you. That really helps clarify things. RT did tell me that CPAP can induce CA's so was becoming a bit concerned that while I didn't have any CA's during sleep study that they were somehow showing up here. It does appear like this is some kind of mild disruption around the CA events, had 5 of them last night but they are all 12 or 10 seconds long and I feel great today so am going to assume they are some kind sleep event as you've described and not the onset of central apnea, or that's what I'll do as long as they continue to just be infrequent and AHI is is low. Thanks!
Post Reply Post Reply
#7
RE: SleepyHead - What is a 'Clear Airway' Event?
Is it possible that a 'Clear Airway' - CA event could also be open mouth breathing? Is there a way to tell if I'm using a nasal mask but breath through my mouth? Would that register in the SleepyHead data in any kind of why that I might be able to see a pattern? I'm waking up with a dry mouth in the middle of the night once in a while and I think I might breathing with my mouth open occasionally in the night.
Post Reply Post Reply



Donate to Apnea Board  
#8
RE: SleepyHead - What is a 'Clear Airway' Event?
No.  Open mouth breathing forces the machine to up its volume to compensate for the leak, which is not at all what happens when you stop breathing.  That is why the machine records leaks; it is a form of useful, rather important, feedback to help you to get the best delivery of the pressure parameters you need.  Open mouth = large leak.  And arousals....unwanted by all but the most hardy of us.  Too-funny
Post Reply Post Reply
#9
RE: SleepyHead - What is a 'Clear Airway' Event?
(03-06-2019, 12:49 PM)dreamstream Wrote: Is it possible that a 'Clear Airway' - CA event could also be open mouth breathing?

No. But mouth-leaking is far more serious than the registering of a CA event. If air is leaking out your mouth your airway collapses and you can't breathe. You are receiving no effective CPAP therapy.

Quote:Is there a way to tell if I'm using a nasal mask but breath through my mouth?

Yes. You look at your leak rate graph. If you see extended periods of time (say 10 to 30 or more minutes) where the leak rate is elevated far above the baseline that could indicate mouth-leaking. Try a chin strap. If that doesn't work, a full face mask.

Mouth leaks can also wake you up, and if enough of that happens your night's sleep is ruined.
Sleepster
Apnea Board Moderator
www.ApneaBoard.com


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.
Post Reply Post Reply
#10
RE: SleepyHead - What is a 'Clear Airway' Event?
Look at the Mouth Breathing segment of the Mask Primer.
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter 
OSCAR

Download OSCAR
New to Apnea? Helpful tips to ensure success
Mask Primer
Dealing with a DME
Organize Charts
Attaching Charts

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.
Post Reply Post Reply



Donate to Apnea Board  


Possibly Related Threads...
Thread Author Replies Views Last Post
  [CPAP] Increases in pressure and Clear Airway events bzz08 21 836 08-12-2019, 06:14 PM
Last Post: bzz08
  Event Duration, O2 Level, Lag, Vibration Alarm rbellamy 0 69 08-11-2019, 12:00 PM
Last Post: rbellamy
  what is clear airway in oscar King of no sleep 10 263 08-05-2019, 12:42 AM
Last Post: Stom
  Too many clear airway events, need help heartrick 25 699 07-21-2019, 02:58 PM
Last Post: jaswilliams
  Help interpreting event in Sleepyhead? jomama 3 346 03-27-2019, 03:55 PM
Last Post: Sleeprider
  Event Numbers - What Do they Mean??? Snoring Bear 2 325 02-23-2019, 01:50 AM
Last Post: Snoring Bear
  Getting High AHI and Large Percentage of Clear Airway rblythe 1 397 02-07-2019, 11:17 PM
Last Post: bonjour


New Posts   Today's Posts






About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.