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Can someone help explain what is happening between 4.30am and 5,30 am?
#1
Can someone help explain what is happening between 4.30am and 5,30 am?
From about 4.30 am for an hour, there appear to be a lot of clear airway events. Can anyone suggest why? Thanks in advance.


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#2
RE: Can someone help explain what is happening between 4.30am and 5,30 am?
Hi Yardam,

I'm not sure, but I'm guessing it's your position?  Perhaps you are sleeping supine?

I'm having similar issues but with obstructive apneas/hypopneas.  Yours appear to be central apneas.  Were you diagnosed with central apneas?  I don't know if central apneas can occur due to position like obstructive apneas.

Positional apneas usually show multiple events clustered together like your chart.  See my chart from earlier today:

Today's chart supine (wedge pillow used)

   

My chart the other day supine (same wedge pillow):

   

I think my pressure needs to be increased, or I need to stay off my back. However, due to inconsistency I haven't tried pressure increase yet.

I'm not sure if that would be the same for you with central apneas.

I'm sure someone else on the forum can help.
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#3
RE: Can someone help explain what is happening between 4.30am and 5,30 am?
Thanks for that,

I've always slept on my side but it could be I roll onto my back. It doesn't happen every night but when it does, it's always at the same time.
As for pressure, if I increase it, I just swallow air unfortunately.
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#4
RE: Can someone help explain what is happening between 4.30am and 5,30 am?
Welcome   Smile
Did you have a lot of CAs in your sleep study?  If you have a copy of your sleep study it would be good if you could post it.  It would help us determine some things.  If there were NOT a lot of CAs during your sleep study that would mean yours are treatment-emergent and will lessen as time passes.

Also, your therapy would be better if you raised your minimum pressure a bit. Set it at 6 or 7. This won't change your upper-pressure limit, so I don't think you will have more aerophagia. If you do, lower it by one digit for the next night.
Machine:  ResMed AirCurve 10 Vauto
Mask:  Bleep DreamPort Sleep Solution
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#5
RE: Can someone help explain what is happening between 4.30am and 5,30 am?
Thank you,

My sleep study was 2-3 years ago, as far as I recall there wasn't a lot of CA. If it is emergent and will lessen over time, how much time does it usually take?

I will try raising the minimum pressure, thanks for that tip.
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#6
RE: Can someone help explain what is happening between 4.30am and 5,30 am?
Pretty much everything I see in this chart is central clusters. It is not positional apnea as there is no apparent obstruction or flow limitation. I'd like to see a minimum pressure of 6.0 and reduce EPR to setting 1. I think leaks are an issue here. If the CA pattern remains consistent, you're going to need a backup rate like ASV.
Sleeprider
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#7
RE: Can someone help explain what is happening between 4.30am and 5,30 am?
You have a consistent mask leak the entire time you have the massive CA cluster also.  Leaks from the mask can let CO2 escape and might contribute to CA's.
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