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upper limit settings
#1
upper limit settings
I wonder: what's the advantage to limiting the upper range of a pressure setting? I understand why a lower limit is important; but why set an upper limit at 15, say, rather than 20? In case your pressure needs should exceed 15? It would seem to be just added insurance--even if your pressure never exceeded 12 or 15.

Thanks in advance for the explanation!
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#2
RE: upper limit settings
2 answers that comes to mind, but there's probably more.

Aerophagia at higher pressure

Runaway PAP due to flow Limits or similar that for some reason can't be fully addressed and make the PAP go up to top
Dave

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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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#3
RE: upper limit settings
Flow limits and leaks drive up the max. It could go up from therapeutic pressure 9 to runaway 20 for example. A small leak becomes a blowout, waking you up, adjusting the mask, this time to tight and the process starts all over again. You have a terrible night and decide not to use your pap.
Apnea (80-100%) 10 seconds, Hypopnea (50-80%) 10 seconds, Flow Limits (0-50%) not timed  Cervical Collar - Dealing w DME - Chart Organizing
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#4
RE: upper limit settings
All the above...Flow Limitations, snores, sometimes a high leak will drive the pressure up and can be disruptive to sleep.

Another consideration is if you suffer with Aerophagia. Sometimes limiting the max setting helps.
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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#5
RE: upper limit settings
Also, higher pressures can *sometimes* trigger more central events (as well as the things listed above), which is likely to make you feel worse instead of better.


See my comparison of Viatom/Wellue and CMS50F oximeters here.

Not a doctor, definitely not your doctor, all advice is given as-is and represents simply my own understanding as a fellow patient and OSCAR user.
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#6
RE: upper limit settings
Wow, excellent points from all! and in fact I've had trouble with leaks causing huge pressure spikes. Great, I'll lower my upper limit today!
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