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[Pressure] What is the theoritical correct pressure for a fixed pressure CPAP?
#1
I am looking for the pressure setting that would be recommended for a straight CPAP. I am not including my data because I want the theory behind what the recommended pressure would be set.

I know I need the minimum to be high enough to be comfortable and to keep the airway from collapsing. I am beginning to believe the minimum is needed to keep the OA's, H's, flow limits, and snores to a min. And, if the max is too high, you will introduce CA's.

My overall numbers and sleep experience is excellent. AHI near 1 with a few exceptions. Gave up the chin strap as it is no longer needed for leaks.

Most of my apneas are CA's which makes me think the max pressure could be lowered. My home study PSG showed zero Centrals so I wonder if I could lower my max which is quite low anyway.

As I said, "Looking for the theoretical pressure for a straight CPAP". I am thinking the changing pressure has some disruptive effect on my sleeping.
CPAP is a journey like “The Wizard of Oz”. It’s a long slow journey. You will face many problems and pick up many friends along the way. Just because you reach the poppies, it doesn’t mean you are in Kansas. 
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#2
Medical overview for professionals here:

Obstructive sleep apnea - http://reference.medscape.com/article/295807-overview
Central sleep apnea - http://reference.medscape.com/article/304967-overview
                                                                                                                                                                                  
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I'm an epidemiologist, not a medical provider. 
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#3
Not that technical. More like setting it to the 90% or median, or high enough to stop OA'a an low enough to keep out CAs.
CPAP is a journey like “The Wizard of Oz”. It’s a long slow journey. You will face many problems and pick up many friends along the way. Just because you reach the poppies, it doesn’t mean you are in Kansas. 
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#4
I would look at the 90% of both the Last Week and last Last 30 days. If they are close, use them. If they aren't I would extrapolate leaning toward the 30 day value.
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#5
If you are running a pressure range of 5-7 as your profile shows, that's pretty narrow.  

Normally a recommendation is made to set it to your 90% or median pressure reading.   Where are your pressures running?  If your topping out at 7cm, then set it to 8cm.
If not, set it to 7cm.  If your profile isn't correct, then scrap what I said.
I would turn the EPR off with such a low pressure.
OpalRose
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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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#6
This is how it is figured out.  This is how a sleep lab does it.

CPAP titration

  1. Set your initial pressure, protocols call for values from 4 to 6 or 2-3 cmH2O below your current settings then

  2. Increase CPAP ≥1 cm H2O every ≥5 mins for obstructive apneas, hypopneas, RERAs and at least 3 min of loud or unambiguous snoring

  3. Is the patient having obstructive events? If yes, repeat step 2
Obviously we cannot make an evaluation every 5 minutes while we are sleeping so we perform our evaluations in nightly cycles.

Once this base is determined we tweak based on data presented in your daily charts over time.

Read this   http://www.apneaboard.com/wiki/index.php...ng_therapy
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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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#7
Here are the last 2 days to demonstrate.

http://imgur.com/a/r3hX2

I have decided to only change settings at the beginning of the month and these settings have been in effect only since the beginning of May.
CPAP is a journey like “The Wizard of Oz”. It’s a long slow journey. You will face many problems and pick up many friends along the way. Just because you reach the poppies, it doesn’t mean you are in Kansas. 
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#8
If my numbers were that low I would automatically raise them by holding my breath hoping the number never get worse.
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#9
Ok, your numbers are excellent, anybody would love to have them. I would recommend no changes. IF, and a big if, you feel the need to tweak remember your current settings as they are a good and safe place to return to. And make only small changes, no more than .5 cm, .2cm would be better.

The better question is how do you feel. Any issues with your pressures, or comfort? This is where I would concentrate.

again congrats on your numbers.
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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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#10
your chart looks good, those 3 clear airways could be anything, you could zoom in and see what they look like. It is normal to have some breathing events

this titration guide may be a help, with how they do fixed pressure cpap titration.
https://www.resmed.com/us/dam/documents/...lo_eng.pdf

http://imgur.com/o9cjuUc
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