RE: Take a look at my SleepyHead data?
I am not used to Sleepyhead (I have an S8 so I can't use it), but from what I can make out that is over 15 minutes of apnea in the night, which is a lot, but I can't see any information about apnea duration. 60 events total average about 15 seconds each, so it is possible that it is not so bad as it seems if they are all quite short. If a few of them are very long you must be feeling pretty auwful the next day, though - and very bloated, perhaps! I would seriously consider reducing the minimum APAP setting dramatically - to around 5 or 6 - for at least 1 or 2 nights and see how that affects you. My feeling is that such a high pressure is of very dubious value, unless there is good reason for believing you really need it. If the machine still insists on going to very high pressures you could consider modestly reducing the maximum pressure setting as well, keeping a close eye on the results.
There are only 3 events in the whole night marked as "obstructive", and I would want to zoom in on those waveforms but I would say all 3 are almost certainly during wakefulness (i.e. not real apneas), and might result from adjusting the mask before sleeping. When the waveform is very rough like that it usually means you are awake.
Some years ago I was using APAP and the machine was (wrongly) zapping up to about 10 to 13 cm by itself, and I found that itself was causing serious apneas. I forced it down to a MAXIMUM of 7 (which at that time was my prescribed setting), and the apneas immediately reduced massively. These days I set it on CPAP rather than APAP at a fixed pressure of 4.6, which works fairly well for me (less than 4.5 tends to result in inadequate flushing of expired air from the mask, I find). The Resmed S8 firmware is very primative in its heuristics and cannot keep track of my breath properly. I use an S8 with the Reslink data unit and Resscan. Hopefully the S9 has better heuristics than the S8.
A critically important question in my opinion is whether you have adequate ventilation? You may find that by making sure you have a really good supply of fresh air. Keep the window wide open and keep the S9 close to it, and make sure that there is an efficient through draft. I find that (plus avoiding excessive pressure) makes far more difference in reducing apneas than anything else.
Another thing which can help for central apneas is taking Lobelia inflata D2 globules immediately before sleeping. It is a homeopathic remedy mostly used for reducing dependence on tobacco, but I find it makes a small but significantly helpful difference to reducing apneas. It is a plant traditionally used by native american indians for breathing disorders, and it apparently strengthens the signal in the nerve going from the brain to the thorax which triggers the breath. (The D2 refers to the concentration, the higher the concentration the more dilute it is; anything above D3 is utterly useless for our purposes, don't bother with it! You will almost certainly need a doctor's prescription for the D2 concentration.) Note that dose is important and you have to adjust it individually by trial and error! If the dose is too high it has the opposite effect!! Try 1 globule per night first (suck it in the mouth until completely dissolved). If it is the optimum dose it will help you drop off to sleep slightly faster than usual, it will slightly increase REM sleep, and slightly reduce apneas (not dramatically, in my experience, but the increase in REM sleep is a real gem). If the dose is too low, the effect will be reduced accordingly. If the dose is too high it will give you a restless/agitated feeling, it will take longer to get to sleep, and sleep will be more broken. In the morning if the dose is optimal or too low the Lobelia will probably have very limited or no drowsying effect, unless the optimal dose for you is relatively high (4-5 globules), in which case you might find yourself a bit sleepy for the first part of the day, and you probably want to sleep a bit longer. If the dose is too high you will probably feel more sleepy in the morning. Gradually increase the dose (maximum 5 globules, always in one go IMMEDIATELY before sleeping) until you find a very slight negative effect (slight restless feeling and broken sleep) then reduce the dose by one. If 1 globule is too strong, take 5 globules of D3 instead, which is the equivalent of 1/2 globule of D2. (Note: according to homeopathic doctrine the effectiveness for homeopathic purposes is supposed to INCREASE the MORE it is DILUTED!! Therefore a homeopathic doctor/pharmacist may try to persuade you that D3 is more "powerful" than D2!! It is NOT!! We are not using it as a homeopathic remedy here, therefore the homeopathic doctrines are entirely irrelevant to our particular purpose, which is as a traditional native american herbal medicine).