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Hi I just started using a Resmed S8 APAP for a couple of nights. Settings: Autoset. Pressure is set to Min of 6 and Max of 12.
I would appreciate any help with the many questions I have :-)
a. what does the Pressure reading on "Efficacy Data" mean ? I saw 9th percentile on the FAQ. And I saw 95th percentile on other websites.
b. I like to understand the difference between the pressure reading on "Efficacy data" and "Smart data". Why are they different ? Today, Efficacy Data reads 10 and Smart data indicated 7.8
c. When awake, the pressure goes up to as high as 10 in some instances. I do not expect the pressure to go up since I'm awake. Is this ok ? This makes me wonder if APAP works for me or not.
d. Sleep lab test indicated a setting of 7 for my pressure. However, my Efficacy data has been reading between 9 and 10 for the last couple of nights. AI has been between 2 and 3. Again, I wonder if APAP is for me or not.
I would appreciate any info. Many thanks.
I would appreciate any help with the many questions I have :-)
a. what does the Pressure reading on "Efficacy Data" mean ? I saw 9th percentile on the FAQ. And I saw 95th percentile on other websites.
b. I like to understand the difference between the pressure reading on "Efficacy data" and "Smart data". Why are they different ? Today, Efficacy Data reads 10 and Smart data indicated 7.8
c. When awake, the pressure goes up to as high as 10 in some instances. I do not expect the pressure to go up since I'm awake. Is this ok ? This makes me wonder if APAP works for me or not.
d. Sleep lab test indicated a setting of 7 for my pressure. However, my Efficacy data has been reading between 9 and 10 for the last couple of nights. AI has been between 2 and 3. Again, I wonder if APAP is for me or not.
I would appreciate any info. Many thanks.
Views: 204
Replies to This Discussion
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Permalink Reply by Dan Lyons on
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Some of your questions may be answered at the link below
http://www.sleepguide.com/page/2549090:Page:11273
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Permalink Reply by Narciso on
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Dan, thank you.
I did not find the answers though. Since I'm new to this forum, I wonder if I should post my questions there instead.
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Ok, what machine are you using? What mask? What is your leakage rate? What are you prescribed settings?
If your leakage rate is high, your machine will adjust for the high leakage, thus giving you a higher reading.
95th percentile is what Resmed uses as a basis of data.
When you are awake, your numbers will be different than when you are sleeping. APAP(Auto PAP) automatically adjusts to your needs. CPAP is Constant Pressure.
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My machine is Resmed S8 Autoset II. Aptiva Mask. Leakage rate: 0.12 L/S week. Settings: Autoset. Pressure is set to Min of 6 and Max of 12. The mask fit indicated excellent.
My findings below make me wonder if this APAP is working properly for me.
a. pressure increases to 10 while awake
b. sleep lab test indicated a pressure of 7, while efficacy data on APAP indicates 9 to 10.
I would appreciate any insight. Thanks.
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Thank you.
My machine is in APAP mode. Is adjusting the settling feature the same thing ?
I would also appreciate any insight into why my efficacy data on APAP indicates 9 to 10, while titration results indicated 7.
Thank you in advance.
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For one thing, even w/the best of sleep techs, one night just does NOT always tell the entire story. For another your Leak doesn't seem all that bad. Resmeds can compensate quite well up to 0.4 L/s.
It is good to see your pressure range setting on the AutoSet II. Somebody who knew what they were doing ordered that pressure range instead of wide open 4 cms to 20 cms so it sounds like you are in good hands.
We do not breathe the same when awake as when asleep. The nights I lay awake a long time my data is a lot worse than when I fall asleep w/in the set Settling time period. Rock Hinkle is correct, Your Ramp should be set to the length of time it usually takes you to fall asleep.
OR it could be that you really do need a pressure between 9 and 10 cms. I remember reading, and haven't been able to find the article since, that when compared to a Respironics and (I think) a Puritan Bennett, the Resmeds tended to provide close to 1 cm higher pressure than the other two manufacturers. This was the result of some research trial about the accuracy and efficacy of auto PAP titration. Gads! I HATE it when I remember bits and pieces of what I've read and can't find the source again.
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Permalink Reply by RockRpsgt on
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Narciso your machine is counting awake events. When you first turn on the machine you should see a feature called settling I believe. this is a ramp setting. You should be able to adjust this from off up to 45 minutes. I would suggest starting no higher than 20 minutes. the idea behind this feature is to allow you to fall asleep before the pressure starts to rise. I would also suggest that as you get used to the machine that you lower this according to your comfort level.
the reason that your machine is going so high is because it is in auto mode. this mode is set to a range of pressures rather than a straight pressure. Even though your titration level is 7 your range is probably something like 6-11. That was just a guess, but I hope you get my meaning. Straight CPAP mode is a set setting mode. Your pressure will always be the same unless you use the settling feature I described above.
I have to ask did you actually wear a mask during your study or is your doc playing the guessing game? Do you know if your prescription was for auto mode or for a straight pressure?
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We did some experiments on the Respironics Pro M, and the Resmed S8s. We found that while the Pro M was a little better than the S8, neither machine was all that great at telling the difference between someone holding their breath or actually having an apnea. Our conclusion was that the ramp(settling) feature was a must when using either machine in auto-mode. No matter how good the algorithm is the machines do not measure enough parameters to tell if a person is asleep or awake. Despite this drawback both machines are top of the line. I will say to date it was one of the funniest nights I have had in a sleep lab.
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Permalink Reply by BeeAsleep on
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WOW, I didn't know that Rock. I have the S8 Autoset II and use it in auto mode. I don't use the ramp feature at all.
The settling is turned off so it starts out at 8. ( The autoset is at 8-12) So you are suggesting that to get more accurate data you set the settling time high enough to allow you to go to sleep first? I guess I am not clear.
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Yes Bee, but as I said I would not set it more than 20 minutes. As you get your timing down you can always lower it. In your case it probably would not matter much as you must fall asleep pretty fast as you have great data. In Narciso's case he is still awake and his machine is almost maxed out.
BeeAsleep said:WOW, I didn't know that Rock. I have the S8 Autoset II and use it in auto mode. I don't use the ramp feature at all.
The settling is turned off so it starts out at 8. ( The autoset is at 8-12) So you are suggesting that to get more accurate data you set the settling time high enough to allow you to go to sleep first? I guess I am not clear.
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Rock, I wore a mask during the study.
I'll set the settling time to 15min. And monitor the readings on the Resmed displays a few more nights and see what happens.
Thank you everyone for the useful info.
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Gotcha' thanks.
Rock Hinkle said:Yes Bee, but as I said I would not set it more than 20 minutes. As you get your timing down you can always lower it. In your case it probably would not matter much as you must fall asleep pretty fast as you have great data. In Narciso's case he is still awake and his machine is almost maxed out.
BeeAsleep said:WOW, I didn't know that Rock. I have the S8 Autoset II and use it in auto mode. I don't use the ramp feature at all.
The settling is turned off so it starts out at 8. ( The autoset is at 8-12) So you are suggesting that to get more accurate data you set the settling time high enough to allow you to go to sleep first? I guess I am not clear.
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