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Another set of questions about the Aircurve 10
#11
RE: Another set of questions about the Aircurve 10
Looking at the charts I see awakenings immediately following some of the high pressure events. I think the machine is applying close to maximum pressure support (PS) to overcome hypopneas and prevent them turning into full-blown apneas. It's this very high PS which is causing the disturbance.

I agree with Dave's approach, but I'd be a bit more aggressive - raise the minimum EPAP to 8. Set MinPS to 3.0 and maxPS to 10. My guess is that you'll have a few more hypopneas and perhaps some apneas, but a far more relaxing sleep overall. Remember - the objective is not to get low numbers, the objective is to get a good night's sleep!

Try these values for a few nights then review.
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#12
RE: Another set of questions about the Aircurve 10
These are really useful ideas from the whole group - I'm very grateful.  I'll start playing with the PS values in the next week.

Meanwhile, I understand what the IPAP and the EPAP variables are for, as they have been used in previous machines.  Could someone explain or point me to a reference for what the PS variable is, and how it affects everything else?

Many thanks,

Steve Lowens
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#13
RE: Another set of questions about the Aircurve 10
PS is simply the difference between IPAP and EPAP. It's the additional pressure applied as you inhale. EPAP + PS = IPAP.
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#14
RE: Another set of questions about the Aircurve 10
PS stands for Pressure Support. When you are running the machine in ASV Auto mode, all 3 sets of pressures (EPAP Min-Max, PS Min-Max, and although hidden to user IPAP Min-Max) are continuously variable according to machine analysis. EPAP + PS = IPAP whatever is the current machine chosen number within those ranges that are set in the clinician menu for EPAP and PS. IPAP equals the sum of those two.
INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEBSITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#15
RE: Another set of questions about the Aircurve 10
This simple titration protocol flow-chart may help explain how we use the settings:

[Image: attachment.php?aid=4210]
Sleeprider
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#16
RE: Another set of questions about the Aircurve 10
I've had several nights with my new settings:

Min EPAP 5.0 (unchanged)
Max EPAP 8.0 (was 10.0)
Min PS 3.0   (was 0.0)
Max PS 11.0  (was 20.0)
Max IPAP 19.0 (was 30.0)

I'm not being awakened by high pressure any more, am sleeping much more soundly, have AHIs averaging under 5, and the fatigue seems to be reducing, though still variable.  I'm very pleased and grateful for the recommendations from this group.

Also still waiting for a return message on this issue from my sleep therapist, which I sent on August 25.

Steve Lowens
Alameda, CA
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#17
RE: Another set of questions about the Aircurve 10
OK sounds like a step in the right direction. Congrats. You could post up some OSCAR data from this if you'd like. Maybe there's fine tuning to be had. Nevertheless, try these for a few days and evaluate how you're feeling.
INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEBSITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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