RE: Central Apnea
In Canada, (Ontario at least) your health records are yours, held in custody by your doctor. You do have a right to a copy of them at a nominal cost. My clinic charged $20 for each of my reports. I didn't ask for the raw data records, mostly because They are too detailed until interpreted.
Apnea Board Monitors are members who help oversee the smooth functioning of the Board. They are also members of the Advisory Committee which helps shape Apnea Board's rules & policies. Membership in the Advisory Members group does not imply medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.
RE: Central Apnea
That is a significant improvement, reducing AHI from over 30 per hour to less than 5 per hour. It is the result of more than doubling the pressure support from 4.0 cm to 9.0 cm, moving settings from 14/9.0 to 16.0/7.0 (IPAP/EPAP). The machine is now capable of trigging IPAP and breathing for you, whether you need it or not. ASV remains the correct therapy to allow you to breathe spontaneously and to use adaptive pressure support to help you breathe as needed. We have given you the information needed to discuss alternative devices, specifically ASV. ST has shown that with enough pressure support you keep breathing, however the ASV is designed for your problem, and the ST is intended to treat disease and hypoventilation. Keep pushing for ASV.
RE: Central Apnea
A used Resmed S9 VPAP Adapt model 36007 with 8698 hrs cam be purchased on DotMed for $550. That is the older model ASV, but has auto EPAP pressure and full ASV functionality. I don't know how difficult importing a used machine to Canada would be, but others have done it. Considering this is the recommended therapy for central and complex apnea, what does that tell you about OHIP that there is no provision for this device? It means people with central apnea will not be treated with the right device.
We will need to see if the new settings on the ST continue to provide the level of efficacy shown in your first try.