Quote DeepBreathing: I don't think your machine reports periodic breathing. I believe that Resmed's position is that the Pacewave algorithm completely eliminates central aneas and PB, hence there is no need to report it.
Quote asjb: Yes, that's interesting. And maybe a little over-confident of Resmed. I have occasional nights …..with runs of apnoeas and hypos that are clearly a form of 'periodic breathing'.
Quote Vsheline: Hi Asjb, Actually, the occasional clusters of apneas and hypopneas in the data you've posted on Apnea Board from your ASV machine have, I think, all been obstructive in type.
I think by definition Periodic Breathing and CSR are breathing patterns which are caused by our central nervous system. Meaning, to be properly identified as being PB or CSR I think these must be central events rather than obstructive events.
It is possible for a central apnea to transition into an obstructive apnea, starting as a central apnea but ending as an obstructive apnea. However, if memory serves, the apneas in the data you've posted appeared to me to be purely obstructive. (end quote)
Hello Vsheline,
Referring to a different thread -
http://www.apneaboard.com/forums/Thread-...ngs-please
- another member answered my query about these bouts of events I have with ASV (and also when I was on CPAP/APAP). He commented:
Quote: <The period you zoom into on the chart is a periodic breathing pattern with hypopnea terminating in recovery breathing with an interval of a minute to 1-1/2 minutes>.
When I used APAP, the Airsense used usually to highlight identical events as <Cheyne Stokes> (or 'Periodic breathing' as many people on the forum refer to them). In this earlier thread you continued to describe them as <clusters of events>.
There are quite a lot of published references that say similar to <It is now known that periodic breathing generally occurs during sleep, that it may occur in healthy persons, and that the apnea is usually central rather than obstructive However, periodic breathing can also be associated with obstructive apnea.>
So, perhaps we should stop using the phrase 'periodic breathing' and use instead your term 'clusters of events' (unless of course the flow waves clearly show true Cheyne-Stokes) ?
best wishes,
asjb
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My current pressures: Auto-ASV. EPAP 11-14. PS 3-10