ResScan Data - Length of Hypopneas

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
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ColinP
Posts: 349
Joined: Wed Nov 21, 2007 7:26 am
Location: South Africa

ResScan Data - Length of Hypopneas

Post by ColinP » Tue May 13, 2008 6:00 am

I'm now up and running with my card reader and ResScan (ver 3.4), and have been looking at my detailed data to try and work out why my AHI is so high (my best night ever was AHI = 7, AI = 0).

I'm feeling quite relieved, as my longest apnoea on the week and a bit that I have detailed data for is 12 seconds, with most of them being 10 or 11 seconds. The hypopnoea look like they're very short too - often on the graph it will look as if there was a long continuous hypopnoea lasting quite a few minutes, but when I zoom in, I can see many discrete hypopnoea lasting about 10 seconds each, roughly every minute or so.

Image

I know that I am a very slow breather, so what I hope is happening is that my CPAP is registering hypopnoea and apnoeas where I am merely breathing too slowly for it.

To all those who know 'stuff'.
1. Am I correct in my assumption that the discrete blue dots on my ResScan report are separate hypopnoea (I can't find one longer than 10 seconds to see what long hypopnoea should look like) or are they in fact longer and ResScan only sticks a tick every minute to tell me that I am still in a hypopnoea?
2. How likely is my theory that I am doing better than my numbers indicate, but that my slow breathing is screwing the detection software around?

Thanks in advance,

Colin


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BarryKaraoke
Posts: 176
Joined: Thu Mar 06, 2008 8:03 pm
Location: Patterson, NY

Post by BarryKaraoke » Tue May 13, 2008 7:03 am

Depending on who you ask, ResMed machines are either too sensitive and overscores hypopneas...or the others brands are not sensitive enough and underscore them.

The fact that your AI is '0' is a great sign that you are on the right track though. Thanks to this site, I have been tweaking my pressure for a while now and just reached that goal myself last night.