Hi, I'm recently diagnosed with extremely severe OSA, and am meeting my DME tomorrow to get setup on my machine and mask.
On my initial take-home study, my AHI was 108 and they noted breathing consistent with Cheyne-Stokes Respiration. Because of this, my in-lab titration was for ASV. The ASV study results show that there was no CSR once the obstructions were cleared up, and there were "very few machine-triggered breaths." My doctors treatment notes say " Since there was no Cheyne-Stokes Respirations, ASV is unnecessary. auto titrating BiPAP would be more appropriate with a minimum EPAP of 7 cm H2O, maximum pressure 25 cm H2O, pressure support 0-6. " Which looks to me like basically a wide-open BiPAP.
When I spoke to the DME on the phone a couple of days ago, asked what machine I was getting, and they said they doctor prescribed a Respironics ASV. (This was before I'd seen the study results.) I haven't been able to speak to the doctor directly, and the report they sent me isn't the actual prescription, I think.
I plan to ask the DME if the prescription is really for an ASV. If it is, is the ASV part of the algorithm basically just sitting dormant waiting for CSR and CA's that never occur? In other words, is an ASV basically the same as an Auto BiPAP for someone with basic (if severe) OSA? Are there downsides to starting with an ASV machine (besides the price being about 3x a BiPAP), like becoming dependent on ASV, that would make it advantageous to start with a simpler machine?
Also, is there a reason a sleep doctor would prescribe ASV without CA's or signs of CSR/periodic breathing?
Untreated AHI: 108, 02 nadir: 69%
Treated AHI: 0.4!
PR Remstar System One Auto SV
PR Wisp mask