Hybrid + ResMed S8 Vantage

jsmott · Post by **jsmott** » Sat Aug 19, 2006 8:20 am

Just getting ready to use the Hybrid. I have a ResMed S8 Vantage and I'm not sure what mask setting it should be set at. My guess is the " full mask " setting. Anybody know for sure?

DreamStalker · Post by **DreamStalker** » Sat Aug 19, 2006 8:48 am

I have tried both "full mask" and "swift" settings and still get the major leaks during last session message ... but I am certain I have none. I think the exhuast flow is so great that it fools the machine into thinking you have leaks. I was going to try to close up some of the holes to decrease the amount of exhuast and see if that prevents the message from popping up in the morning.

Anyway, I would also be interested if anyone has a solution for this.

- roberto

Guest · Post by **Guest** » Sat Aug 19, 2006 8:57 am

I have a solution. Buy a RemStar!

DreamStalker · Post by **DreamStalker** » Sat Aug 19, 2006 9:05 am

Anonymous wrote:I have a solution. Buy a RemStar!

Good point ... are remstar users able to get the correct setting for the Hybrid?

dreaming of the perfect CPAP system ...

- roberto

Issac · Post by **Issac** » Sat Aug 19, 2006 9:20 am

I have the same equipment and I'm waiting for VPAP.
I show leak warnings on the Vantage and I ignore them because it's from the high Co2 washout. As long as your AI HI readings are good, dont worry about the leaks your know you dont have.

chdurie2 · Post by **chdurie2** » Sat Aug 19, 2006 10:36 am

just got my S8 vantage, call me naive, but my dme says that you don't use a mask setting for a non-resmed mask. the machine works fine without one. so is there a reason you need to find a mask setting for hybrid? (am awaiting the arrival of my own hybrid.)

Caroline

DreamStalker · Post by **DreamStalker** » Sat Aug 19, 2006 11:07 am

[quote="chdurie2"]just got my S8 vantage, call me naive, but my dme says that you don't use a mask setting for a non-resmed mask. the machine works fine without one. so is there a reason you need to find a mask setting for hybrid? (am awaiting the arrival of my own hybrid.)

Caroline

maskjkie · Post by **maskjkie** » Sat Aug 19, 2006 11:34 am

DreamStalker wrote:
chdurie2 wrote:just got my S8 vantage, call me naive, but my dme says that you don't use a mask setting for a non-resmed mask. the machine works fine without one. so is there a reason you need to find a mask setting for hybrid? (am awaiting the arrival of my own hybrid.)

I suggest using the "full face" setting. The vent flow rate is generous, so ignore the high leak as long as you are sure you have gotten a good seal.

chdurie2 · Post by **chdurie2** » Sat Aug 19, 2006 11:40 am

When my DME was setting mine up, he first thought I didn't have a Resmed mask, so he said we just won't set the mask thingee. It doesn't have a setting to turn it off on a separate screen? Then I pointed out that I was using UMFF so he set it. I'm new with this machine, but I see lots of screens that just indicate on or off. I'm assuming there is one for mask, since the DME indicated that the mask setting was optional, as many settings are.

Caroline

Bob... · Post by **Bob...** » Sat Aug 19, 2006 11:42 am

chdurie2 wrote:just got my S8 vantage, call me naive, but my dme says that you don't use a mask setting for a non-resmed mask. the machine works fine without one. so is there a reason you need to find a mask setting for hybrid? (am awaiting the arrival of my own hybrid.)

Here is my spin on this:

The S8 uses the type of mask you are using for two things:

1…The Mask-Fitting Feature – if you select the mask you are using in the menu the S8 will display a series of asterisks to show you if you have excessive leaks. It does this by knowing the Bias or built in leak rate of the mask selected and comparing that to the actual leak .

2…The leak rate shown on the LCD is also based on the mask selected. Again the Bias or built in leak rate of the selected mask is subtracted from the actual leak and displayed in LP/S or Liters Per Second. Example: You are using the Swift mask and at your pressure its Bias rate is 25 LP/M. The S8 will display the difference between 25 LP/M and the actual leak rate.

If your mask is not listed in the menu then you can just select a mask that is as close as possible to one that is listed and then with some extra math figure out what your real leak rate is. Another example: I use a CL2 with the Simple Cushion the leak rate difference between it and the Swift, which I have selected, is about 1 LP/M less at my pressure. That means I can subtract .016 LP/S from my displayed leak to get the true leak amount. My displayed leak rate averages .16 LP/S so .16 - .016 = .15 LP/S

I haven’t been able to obtain any information on what is an excepted total leak rate, but in my personal data if I stay below .3 LP/S displayed leak rate I’m happy. That equates to 23 LP/M for the CL2 plus .15 LP/S (or .15 times 60 = 9 LP/M for other leaks) = about 32 LP/M total.

So is selecting the right mask in the menu absolutely necessary?

If you want to use the Mask Fitting Feature probably yes. If you want to know the exact leak rate displayed, probably yes. If those points are not particularly necessary, probably no.

How does this effect the Auto algorithm, I have no idea. I don’t have an Auto so it isn’t a real priority for me at this point.

Bob

Mask

Additional Comments: Large mask collection

Mask

Additional Comments: Large mask collection