(05-13-2016, 09:49 AM)Wrz77 Wrote: Hello I am wondering if this periodic breathing graph segment is indicative of Cheyne-Stokes or not. This is the first time a PB event was logged in my 2 weeks or so usage of CPAP.
Note: I did take an opioid analgesic ("narcotic") before sleeping in this particular instance so perhaps even if it was CSR it is not a big deal and doesn't indicate the serious stuff like stroke, congestive heart failure, and/or Parkinson's disease.
EDIT: Correction, I've had previous PB events but not that many. Added second attachment showing other PB segments.
Hi Wrz77, welcome to the forum.
In my understanding, true CSR and true PB are central in origin/type, but I think the terms CSR and PB are often misused to describe events which are primarily obstructive in type.
Further, true CSR (the pattern described in the medical literature as indicative of serious disease) applies to the pattern when seen without 'PAP therapy. CPAP therapy-induced PB and CSR-like breathing patterns are not rare and I think usually do not indicate disease.
Your second and third examples of what SleepyHead has marked as "PB" or "CSR" are flagged with RERA, which is obstructive in type, caused by partial restriction in the airway. So, in my view, those examples should not be considered PB.
Based on the often flattened (non-rounded) tops of the Flow waveforms, the other examples also do not appear to me to be simply or purely central and usually have a significant obstructive component. Obstructive conditions are usually improved by adjusting the pressure higher (or, in an APAP machine, by adjusting the Min Pressure higher).
The apneas are usually too short to be flagged. Officially, apneas, hypopneas and RERAs must last at least 10 seconds to be scored.