Tidal Volume equivalent on a ResMed AirCurve ASV(?)

I have CA/OA. I am a 25-year old male weighing 200lbs at a height of 5’11”.

I use a ResMed AirCurve 10 ASV (in ASVAuto mode). My doctor wants me to maintain a Tidal Volume of 200-600 mL. (200 min./400 median/600 90th percentile).

My AirCurve 10 ASV uses a constant “Minute Volume” to manage CA. (The currently recalled Phillips devices use Tidal Volume.)

Question: To what values should I set the four parameters of my AirCurve 10 ASV in order to produce a Tidal Volume range of 200-600 mL?
The four parameters are:
Min EPAP (4.0-15.0)
Max EPAP (4.0-15.0)
Min PS (0.0-6.0)
Max PS (8.0-20.0)

Thanks.

If your doctor wants a set Tidal Volume, (and the AC ASV reports tidal volume as tidal volume), then you don't need an ASV, because ASVs just maintain the level of your current TV.

If you need to *set* at TV, then you need the Resmed Aircurve ST-A.

I think you need to adopt settings which adequately treat your apneas, then see what sort of tidal volume you're achieving. If necessary you can adjust from there to optimise your Vt. Resmed recommend PSmax be set at 15 or above to eliminate central apnea. I like to have PSmin at 3 as it's comfortable. EPAP is set wide open (4 - 15) to take care of obstructive events (it usually stays pretty low).

Tidal volume alone isn't a great measure of respiration - it needs to be measured in conjunction with respiration rate to determine the total amount of air you're breathing (minute volume MV). A low Vt and high RR will give you the same MV as a high Vt and low RR. This is why Resmed targets the MV in their algorithm.

Thanks very much for these replies.

Well without a patent airway, adequate ventilation can be difficult to achieve. Focus on the airway first (reducing OSA as much as possible). But the ASV can't guarantee any certain volume. More pressure support can help, but still there is no guarantee of any certain volume. But for most healthy people, a small increase in PS will go a long way in boosting tidal volume.