What is an "acceptable" leakage reading on my machine with the Quatro mask?  I looked at the manual and the leakage graph there, but I'm not sure what that graph was telling me or how that translates to the L/s reading on my machine.  Is the utlimate goal a 0 leakage reading?  Or is something higher ok?  My DME tells me this machine does not record small or short leaks, so I'm wondering if any reading over 0 is "bad".


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Severe sleep apnea diagnosed 4/2010
Resmed S8 Elite II w humidifier
Mirage Quatro
Pressure set at 6 - 16

Is there no answer to my question?  Or did I post this in the wrong spot or something?


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Severe sleep apnea diagnosed 4/2010
Resmed S8 Elite II w humidifier
Mirage Quatro
Pressure set at 6 - 16

I don't have any experience w/the Resmed S8 IIs. The S8s gave us our Leaks in numbers. The S9s just give an OK or not OK.

W/the S8s Leak under 24 L/M was fine and Leak under 40 L/M they could compensate for by providing higher pressure.

Along the left side of the Quattro literature leak graph are the allowed leak rate, along the bottom are the various pressures, where the symbol appears in the graph line is the allowed vent rate at that pressure.


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Resmed VPAP Auto. Humidaire 3i, ProBasics Zzz-Mask full face, ResScan 3.7, S8 ResLink, Embla oximeter.
Currently trialing PR SystemOne BPAP Auto w/Bi-Flex, EncorePro 2.2, ConTec CMS-50D+ oximeter

The S8 gives the leak rate in L/s which I assume is liters per second.  So 24 liters per minute translates to .4 liters per second.  Therefore, my readings of .08 and under are ok.  Am I thinking correctly here?
  The reason for my question is my attempt to find "the" mask.  I started out with an XS Quatro and have worked my way up to a Medium Quatro.  I am sleeping much better with the medium, but am getting leak rates showing on the machine.  With the XS and Small sizes, I had no leaks most nights.  If my leak rates are "acceptable", do I choose the mask that allows me to sleep better or do I go back to not sleeping as well but having no leaks?


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Severe sleep apnea diagnosed 4/2010
Resmed S8 Elite II w humidifier
Mirage Quatro
Pressure set at 6 - 16

Ah, yes, I forgot Resmeds use L/s but does allow us to change that to L/M, which I did eventually get around to doing since math was never my forte.

If your Leak rate is "acceptable" w/the comfortable size Quattro, then go w/the comfortable size Quattro. The whole idea is to get a good, restful, restorative sleep.


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Resmed VPAP Auto. Humidaire 3i, ProBasics Zzz-Mask full face, ResScan 3.7, S8 ResLink, Embla oximeter.
Currently trialing PR SystemOne BPAP Auto w/Bi-Flex, EncorePro 2.2, ConTec CMS-50D+ oximeter

I did some research on this question and i found some information on another forum/website in reply to a poster who had the exact same question as you.

For ResMed, the acceptable leak rate is under .2 liters/second = 12 liters/minute.
A leak rate of .4 l/s = 24 l/m, it starts to affect therapy, and the data is unreliable.

For the S9, be sure you have the correct Mask Setting. If you mask is not a ResMed mask, then look up the vent rate for your mask, and match it to the closest ResMed Mask, for your pressure, using this chart:

http://www.resmed.com/assets/documents/service_support/pressure_flow_rates/1012648_pressure-vs-flow_usa_eng.pdf

Thanks, McFloozy!  I've been following your progress with this whole game - and doesn't it feel like a game at times.  I appreciate your research on my behalf.  My life is extremely busy at the moment and I haven't been able to research as much as I would like so it's nice to have folks on this forum help me with questions!


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Severe sleep apnea diagnosed 4/2010
Resmed S8 Elite II w humidifier
Mirage Quatro
Pressure set at 6 - 16

'game' is putting it mildly....
It's a royal PITA is what it is, lol


No need to thank me, lol
By asking this question, you actually helped me out.

I actually never knew anything about leakage rates and what it all meant until you asked this question. I had seen your posted question yesterday, but was unable to answer with a reply because, in all honesty, I had no clue what the heck you were talking about with regards to pressure L/s L/M's and stuff....(it all looked like chinese to me)

Rather than disregard the question, I wanted to find out just as much as you did, lol

The folks on here have helped me tremendously with my own questions too.