night 1 APAP results

[REMemberWhen]

AHI= 2.3
leak rate= 39.5
90% pressure= 13
min=10 max=16.....30 minute ramp starting at 8

I had a great night sleep and didn't wake up due to leaks as I did with the CPAP set at 15 or 18. My leak rate numbers are less than they were with the CPAP (it was in the 40's) but the number seems high to me, but in all honesty I have no idea what the number means so maybe I'm doing just fine. I don't have the software yet so I only have the LCD screen to rely on. In a week I am going to bring my card in and get a report after a full week on the APAP. It sure will be nice when I can afford the software; my birthday is coming up so hopefully I can get it then, I cant think of a better or more important present. From the limited info I provided, can anyone tell me how I am doing? I think my AHI is good, the best it's been since I started treatment 2 weeks ago today. When I was on the CPAP my AHI was around 3.1. What are your thoughts?

[Wulfman]

Looks good to me. How you feel is and will be the true test.

Den

[Snoredog]

Leak rate is not bad for a Full Face mask, with zero external leak you will be in the 28-32 range, so 7L/m is nothing.

I'd continue with current settings a few more nights and observe AHI. An AHI=2.3 is very good considering that number includes Hypopea.

90% pressure of 13 suggests you could go higher than 10 cm with the Minimum pressure, but I don't expect that will improve on your AHI any.
The result of higher pressure can be more noise, greater leak and less comfort. You may sleep in different positions, that 10 cm Minimum may be about right and 13 while on your back or supine.

Looks good, I'd use it the way it is.

[echo]

Ditto to what Den said. Your AHI numbers may be on the higher side but you may be feeling OK, but conversely you may have great AHI and still feel lousy due to other (related or not) issues. Remember that a titration only sees how you sleep on ONE night, so if your ideal pressure is lower than your titrated pressure then I wouldn't worry too much about it. Some people on the forum shoot for a < 1.0 AHI, but I'd say you're doing GREAT with it down to 2.3!!

On the leak rate, you have to check what the normal leak rate is for the Quattro. (for a pressure of, say, 13).

[RafterRattler]

Ok...different machine, but I use a Quattro mask. Those leak rates sound REALLY high to me - what are the units? For reference, I usually average .06-.08 L/sec at 12-13cm with my Resmed machine...

Mike

[Snoredog]

Ok...different machine, but I use a Quattro mask. Those leak rates sound REALLY high to me - what are the units? For reference, I usually average .06-.08 L/sec at 12-13cm with my Resmed machine...

Mike

You are using a Resmed machine which reports leak in Liters per Second (L/s). The OP is using a Remstar which reports leak in Liters per Minute (L/m).

So if you want to compare you have to take your .06 and multiply it by 60 seconds to get Liters per Minute. So your .06 x 60 =36 Liters per Minute by comparison, you are only 3 L/m lower than OP's 39 L/m.

Most mask interfaces including those from Resmed include and plot the exhaust flow rate in Liters per Minute.

So to use those flow charts with your Resmed machine (even if it is a Resmed mask like your Quattro), you have to do the math and multiply what your machine gives you by 60 to get L/m and compare to the chart. The chart will show you the pressure, just find your pressure on the chart and observe the flow rate, compare that to what your machine is saying to determine actual leak. Any leak higher than that flow chart is external leak and steps taken to reduce it.

[RafterRattler]

You are using a Resmed machine which reports leak in Liters per Second (L/s). The OP is using a Remstar which reports leak in Liters per Minute (L/m).

So if you want to compare you have to take your .06 and multiply it by 60 seconds to get Liters per Minute. So your .06 x 60 =36 Liters per Minute by comparison, you are only 3 L/m lower than OP's 39 L/m.

Yeah...see....so there's my problem. That's what I originally thought too - but by my math, .06 x 60 = 3.6 L/m, not 36. That's why 36 sounded high to me. Am I missing something?

Mike

[Wulfman]

You are using a Resmed machine which reports leak in Liters per Second (L/s). The OP is using a Remstar which reports leak in Liters per Minute (L/m).

So if you want to compare you have to take your .06 and multiply it by 60 seconds to get Liters per Minute. So your .06 x 60 =36 Liters per Minute by comparison, you are only 3 L/m lower than OP's 39 L/m.

Yeah...see....so there's my problem. That's what I originally thought too - but by my math, .06 x 60 = 3.6 L/m, not 36. That's why 36 sounded high to me. Am I missing something?

Mike

Except......your .06 is the leak that is over and above the expected leak rate that the machine is expecting from that mask (which you select in the machine's configuration). All things being equal and the mask selection in the machine is correct, your .06 is actually "leakage". If you had a "perfect" night, your leakage would probably be point ZERO ZERO (.00).

Den

[REMemberWhen]

I am not sure why, but when i checked my data this a.m., after changing nothing from the day before and having what I would consider another good night sleep, none of my data changed INCLUDING 7 and 30 day usage hours. It's like the machine didn't register my data from last night. Does anyone know why this may have happened? My 7 day hour avg. is the same today as it was yesterday, even after about 9 hours of use. (I slept from 10:30 pm to 7:30 am) Am I doing something wrong or is the machine messed up or maybe something else?

[RafterRattler]

Except......your .06 is the leak that is over and above the expected leak rate that the machine is expecting from that mask (which you select in the machine's configuration). All things being equal and the mask selection in the machine is correct, your .06 is actually "leakage". If you had a "perfect" night, your leakage would probably be point ZERO ZERO (.00).

Den

Ok - that's fair. I can see how that would make a huge difference. Thanks
Mike