Use ASV machine as CPAP?

Hello! Newly diagnosed, first time on this site. My husband used his Phillips Respironics DreamStation BiPAP autoSV machine (DSX900S11F) until recently and no longer needs it. I just completed my first sleep study and was diagnosed as needing a CPAP. They tell me that I cannot use his machine (which is brand new thanks to the recall), but I saw post from 2012 that suggested the settings could be modified to effectively shut off the ASV function. I read that making the Min and Max EPAP the same number, and setting Min and Max PS both to zero, is what I would need to do. Thoughts? Thanks!

janiedog wrote: ↑

Thu Mar 16, 2023 3:34 pm

I read that making the Min and Max EPAP the same number, and setting Min and Max PS both to zero, is what I would need to do.

Those settings would do it BUT I don't think the machine will let you do it. I think when you try to make those changes the machine won't offer the needed options.

Give it a try and see what happens.

janiedog wrote: ↑

Thu Mar 16, 2023 3:34 pm

My husband used his Phillips Respironics DreamStation BiPAP autoSV machine (DSX900S11F) until recently and no longer needs it.

may i ask why he no longer needs it?

if i'm not being too nosey.

I think I've cracked the code and modified machine settings. I'll let you know how it goes!
P.S. My husband lost 100 lbs and his recent sleep study findings indicate no apnea. Yay him! Now we're addressing my snoring.

janiedog wrote: ↑

Thu Mar 16, 2023 4:41 pm

I think I've cracked the code and modified machine settings. I'll let you know how it goes!
P.S. My husband lost 100 lbs and his recent sleep study findings indicate no apnea. Yay him! Now we're addressing my snoring.

good on you (and him!) for doing the sleep study follow up. so many folk assume that just losing weight will cure apnea without bothering to do the test.

hi janiedog,

I am trying to do the same as you after my diagnosis changed from Central to Obstructive. I purchased the BiPAP ASV machine for the initial diagnosis and now would like to use it as a CPAP. Can you share what you did to "crack the code" so I can replicate for my situation.

Thanks you!

You may also want to leave enabled and play with some of the bilevel settings - it can be much more comfortable than constant CPAP. In fact, there may even be a way to keep the ASV functionality (with the settings at their lowest intrusion levels), if you can't turn them off. I'm not familiar with the Respironics machines (their lack of configurability is what made me switch to ResMed), but I'm sure that many members here could suggest specific settings to try - you already have the more expensive machine, might as well take full advantage.

McSleepy

ASV and BiPap machines should have an option for CPAP or APAP operation, and APAP machines have CPAP as an option. You probably want APAP. My first machine was an ASV machine. My co-pay was more than a new APAP would have been. No one bothered to set up the machine as an ASV so I never got the benefit. But it has both APAP and CPAP modes. I don't know what machine you have, but it almost certainly has CPAP and APAP modes. I think its likely that the DME wants to sell a new machine, there is no upside for them to reconfigure an existing machine. The doctor, or you can set the machine to the prescription.