Relationship of titration pressure and 95% pressure level

[Guest]

Is there any relationship to ones titration pressure and the pressure that a resmed apap machine displays on it's readout?(the 95% pressure). Would one expect those two numbers to be reasonably close?

[Wulfman]

I suppose it's possible, but I wouldn't put money on it. Respironics also uses a "90%" listing, too. All those percentage numbers mean is that all of the pressures up to and including that pressure added up to 90 or 95% (depending on brand) for that particular night. That percentage can be a "moving target" from night to night.
It would have a lot to do with how your machine was configured (among other things).

Best wishes,

Den

[Guest]

I would think this to be an easy question to answer....someone? A person is given a titration number of say 10. They set their apap on a level of 8-12. The 90or 95% readings should indicate a relationship between the titration number and the apap 90-95% number...give or take a couple of points.

[Wulfman]

I would think this to be an easy question to answer....someone? A person is given a titration number of say 10. They set their apap on a level of 8-12. The 90or 95% readings should indicate a relationship between the titration number and the apap 90-95% number...give or take a couple of points.

Your machine is set for 8 - 12 and your titration number is 10 and you're allowing a couple of points?......either way?
This is a trick question, right?

Den

[Guest]

Not to my knowledge but I don't claim to be an expert. I don't know why it's so difficult to get a simple answer to the question. I suspect thousands of apap users get a read out every day and can compare it to their titration pressure...but maybe I am missing something and they never do.

[Goofproof]

But who's to say the titration pressure was correct, and really it changes day to day. That's the reason for APAP. why would one worry about 90% pressure as long as the machine is set to the correct range and the AHI is good?

All I worry about is AHI, length of Apnea events and time spent in apnea. (Poor Mans O2 Meter) The only other thing that concerns me is how I feel. Jim

[Slinky]

I agree w/you, GoofProof, BUT I can also understand the curiosity and frustration of not being able to satisfy that curiosity. No answer is NOT the end of the world, but we can always hope for an answer, just because. Inquiring minds wanna know??

Hoccum you've always got your butt sticking out of that 'puter monitor and are always tearing something apart even as a kid?? Curiosity maybe? Wanna see how it works? Why it works? Why it won't work? Can YOU put it back in working order?? Good ole curiosity. The source of a lot of inventions that have improved our life. (And gotten us into trouble??? )

[JimW]

I don't know with any certainty how the Vantage's recording of events compares with how those detected in a PSG. Specifically, whether the Vantage scores false positives (records an Hypopnea or Apnea where none would be noted in a PSG) or false negatives (does not record either event where one would be noted in a PSG.)

Am not certain whether studies have been done recording with APAP while simultaneously performing a PSG. I do know that my overall 95% pressure level since starting APAP 12/12/06 (9.2 cm) is very close to the pressure which has yielded the lowest frequency of events since 1/30/07; if my analysis is correct, that pressure is 9.0.

[Guest]

*starting to pull hair out*

Surely someone has gone to a sleep lab and been given a titration number. And surely someone has set their apap up so that titration number is within the range of their Apap settings. And surely someone has kept a record of their 90-95% average number over time. And surely someone has compared that number to their titration number? Is it about the same or lower or higher...that's all I am asking.

[Catnapper]

I had a sleep study and my titrated pressure is 13 cms. My auto pap is set for 7 to 13 although it was originally set per the prescription at 7-20. I changed it to 13 max myself. The machine will go slightly above 13, maybe 13.5. Generally, my 90% pressure is somewhere between 9 and 11. Does that answer your question?

Not sure what the problem is.

Catnapper

[Guest]

No problem.....yes that answers my question. Your 90% pressure is around 10 and your titrated pressure is around 13 so on average in your case the titrated pressure is 3 points above your 90% average. Thanks ...maybe a couple of others will offer their results.

[Slinky]

Hey, you would NOT want to rely on my titration pressure at all! I only slept 42 minutes so had to do a second night of titration and only slept 98 minutes that night.

"We" took an educated "guess-timate" at a pressure of 6 w/EPR of 3 (can't go any lower than 4 cms of pressure w/these xPAPs )

When the results weren't satisfactory I was given a loaner AutoPAP left wide open 4-20. The loaner was a bust due to a litany of reasons: no humidifier, passover humidifier (still insufficient), broken mask part (no replacment part), bad fitting mask ...... but in trying to make heads or tails out of the data collected my pressure was upped to 8 cms.

I don't have an Auto so I'm no help to you either. Since we aren't sleep lab professionals or DME RTs and YOU don't have an answer to your own question, how the devil do you expect us to be able to answer? Quit pulling your hair out, make it easy on yourself, PM one of the RTs who drop in to help us out.

[Linda3032]

To answer your specific question ( Is there any relationship to ones titration pressure and the pressure that a resmed apap machine displays on it's readout?(the 95% pressure)). -- NO, not in my case.

I was titrated at 7, and my 90% pressure depends on how high I have my machine set up. If it's from 6 to 10, my 90% will be in the 9's (meaning I might hit 10 very briefly).

I'm more comfortable running my machine close to my titrated pressure.

[JimW]

*starting to pull hair out*

Surely someone has gone to a sleep lab and been given a titration number.

Anyone know if trichotillomania disrupts sleep?

Sorry to disappoint - I had an order for CPAP at 14 cm following my titration study, but I would hardly say that was my titration number.

From 'CPAP TITRATION' section of the interpretation, in the report:
"The patient was begun on 5-cm of CPAP and was increased up to 12-cm of water, which was not the optimal pressure in controlling apneas, nocturnal arousals and improving sleep efficiency. The patient will be put on Auto-pap."

In section 'Polysomnography CPAP Diagnostic Sleep Disorder Physician Summary', way down toward the end of much summary data, is: "Best CPAP pressure : 14." Not sure where this came from. The report had a few other inaccuracies, as well.

I'm sure I likely wound up with an APAP because they really hadn't a clue as to what my best pressure was.

[Catnapper]

My case may not be typical, guest. Many more people have the settings closer to and around the titration number. I was just trying to answer your question. My setting the max at 13 was based on months of not going to the titrated pressure except on rare occasions. I could probably have left it at 20 with no problems.

I don't want to lead you astray if you are intending to set your own machine. Other people here have much more and better experience than I do. What are you trying to accomplish? Most of all, may I suggest you seek help from your sleep doctor?

People will try to help you if you give more information for them to interpret. Tell things like your machine, your mask, your pressure, your specific problem and intention. We are well intentioned, but don't have any way to know all the particulars of your needs, nor are we professionals in sleep therapy. Please realize that we are mostly just other people who have apnea and have found ways to deal with the therapy to help ourselves, not medically trained in the field with a few exceptions.