(08-10-2014, 06:38 AM)Kate Wrote: My machine is model number 36006A. Next to the button, it says VPAP AUTO.
My sleep study was done in a motel with a technician.
Thanks. That's a "ResMed S9 VPAP Auto," not the "4ResMed S9 Bilevel SV AUTO" you have listed in your profile. Please change your profile to avoid confusion in the future.
The DME doesn't decide if you get a machine that treats central apnea. That decision would have to be made by your doctor.
What's your total AHI? What was your AHI in the sleep study?
As for another sleep study, it might be possible if you need another study if your current machine isn't treating your apnea, but it will need preauthorization. In particular, you may be able to get insurance to pay for a "titration," which is a study that doesn't diagnose your apnea, it is used to find the right pressure for your machine. In particular if you get moved up to an ASV machine, you are more likely to get a titration study approved.
While the VPAP Auto isn't "the big gun" machine for central apnea, you may be able to make it work with some adjustment. While people with bad central apnea may really need an ASV machine, there are some drawbacks to an ASV machine.
Look at your centrals on the air flow waveform in your data. See how long they last. If they don't last very long, it's not as worrisome as if they last a long time. I find SleepyHead is easier for me to work with.
Remember that "central apnea" isn't necessarily any more harmful than obstructive apnea. They may just be harder to eliminate.
By the way, your sleep test probably would register central apneas as apneas, it just didn't distinguish between central and obstructive. If the sleep study was done without you wearing a mask and getting CPAP pressure during part of the test, you may not have had any central apneas. Many people don't have central apnea until they get CPAP pressure.