(09-22-2019, 12:12 AM)DeepBreathing Wrote: According to the literature, central apnea is rare. It's so rare in fact that many docs don't even take it into consideration and regard all apnea as obstructive. It would be instructive to find out what proportion of apneacs actually do have central apnea. In the poll, there are three options:
1. Little or no central apnea - you get at most a couple or three central events per night
2. Significant central apnea: pre-existing - You had central apnea show up in a diagnostic sleep test with a central apnea index greater than 5.0
3. Significant central apnea: treatment emergent - Your central apnea only developed once you started using CPAP / APAP.
That's is very interesting question:
(3) first time PSG, no machine: zero; second with machine: 8.3/hr.....
...still wondering if significant CA's do exist, outside the world of (a) wrong pressures; (b) wrong combination of EPAPmin x PS; © leaking-associated events; (d) artefacts following arousals/awakenings/wake ups; (e) transition wakeness to sleep, etc. These in general, fortunately, don't wake me up, when I am not already.
Yet, not sure whether or not CA's would still harm in such cases.
Since I started OSCAR, some 6 months ago, I do see very few true of them (less than 3 to 5; always recounted by myself), except for some two or three bumps associated with (b) or ©.
It appears to me CA's would be more usefull, and they are, I believe, to signal something is wrong with regard those items above.
Good luck.