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Shin Ryoku
Unread post  Post subject: Duration threshold for which CAs can likely be ignored?  |  Posted: Mon Jan 01, 2018 11:31 am
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Joined: Sat Nov 11, 2017 9:04 am
Posts: 16
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I learned a lot from this excellent video by Jason:

https://www.youtube.com/watch?v=xallwxPCg84

Based on that video, the great majority of the CAs I'm seeing in my SleepyHead data aren't real CAs. But it's a pain in the rear to go one by one looking at all the events and manually adjusting my CA index for those.

Which leads me to wonder - is it safe to basically ignore the ones under 15 seconds or some other specified cutoff? I'm assuming it isn't normal to wake, yawn, and stop breathing for a minute. And there must be some duration which tends to be more likely to cause hypoxemia.


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TheLankyLefty
Unread post  Post subject: Re: Duration threshold for which CAs can likely be ignored?  |  Posted: Tue Jan 02, 2018 8:58 pm
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Joined: Mon Aug 15, 2011 10:22 am
Posts: 4646
PAP Mask: Practically tried them all.
PAP Machine: Use Phillips Respironics System One APAP with Aflex for mask testing
Humidifier: None
Pressure Setting: When testing, I use APAP with a range of 5-10

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Shin Ryoku wrote:
I learned a lot from this excellent video by Jason:
Thanks! :) Happy to hear that.

Shin Ryoku wrote:
Which leads me to wonder - is it safe to basically ignore the ones under 15 seconds or some other specified cutoff? I'm assuming it isn't normal to wake, yawn, and stop breathing for a minute. And there must be some duration which tends to be more likely to cause hypoxemia.
Not really. Legitimate CSA can be in that same range of 10-15 seconds....which I would say is the most common duration. Much longer than this I would say is more likely to be legitimate though. This is just playing percentages though. There really is no shortcut other than taking them on a case by case basis.

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