Follow-Up about 95% Pressure Question
So I posted a few weeks ago about my data and how a CPAP pressure would be calculated.
Well, I just got the compliance report that will be sent to the sleep doctor from the at home titration test and the stats were all within acceptable ranges.
If my median pressure over 30 days was 14.5, the 95% was 19.0 and the maximum 20.0, two questions:
(1) Would the CPAP pressure be close to 19?
(2) Would I be safe to say that I should mention to the doctor about a BiPAP?
Thanks!
RE: Follow-Up about 95% Pressure Question
If you had the following pressure readings during a sleep session: 8, 16, 9, 20, 12, 14, 18, 8, 10, and 12. The median would be 12 and the 95 percentile would be 19.1 (as I calculate it). The median is calculated by arranging the values in ascending order and the one in the middle (50 percentile) is the value of 12. The 19 @ 95 percentile means that 95% of all recorded values are below 19.
You are bumping the upper threshold of a CPAP at 20. Time, playing with your sleeping conditions, and weight loss may reduce the maximum pressure needed. BiPAPs are almost twice the price of an auto titration CPAP. Unless you have rich relatives or a real good insurance policy, I'd recommend that you try working with the one you have for a little bit longer.
RE: Follow-Up about 95% Pressure Question
(09-08-2015, 02:31 PM)ramblingasian Wrote: So I posted a few weeks ago about my data and how a CPAP pressure would be calculated.
Well, I just got the compliance report that will be sent to the sleep doctor from the at home titration test and the stats were all within acceptable ranges.
If my median pressure over 30 days was 14.5, the 95% was 19.0 and the maximum 20.0, two questions:
(1) Would the CPAP pressure be close to 19?
(2) Would I be safe to say that I should mention to the doctor about a BiPAP?
Thanks!
Yes, but that doesn't mean you need a bipap (yet). However, if your machine is closing in on 5 years, discuss with the doctor over that option. In my case, I've needed slightly higher pressures lately due to pollen and the western fires. After it rains, that night, I'm back down again. Look at your Sleepyhead data as well. If you are only briefly at 19 and you aren't having a lot of events, you really don't need a bipap as your machine can handle what you have already.
Now, my machine is currently set with an 8-12 range. I've had a few nights where its spending more time at 12, but only one night where I had increased events because it couldn't go higher. The single numbers give you an idea of what is up over time, but you can also see how LONG you are staying at that number more easily by looking at the daily sheets.
I'm still a beginner, but I'm starting to see how sleeping conditions can affect data day to day.
RE: Follow-Up about 95% Pressure Question
(09-08-2015, 03:20 PM)sgearhart Wrote: If you had the following pressure readings during a sleep session: 8, 16, 9, 20, 12, 14, 18, 8, 10, and 12. The median would be 12 and the 95 percentile would be 19.1 (as I calculate it). The median is calculated by arranging the values in ascending order and the one in the middle (50 percentile) is the value of 12. The 19 @ 95 percentile means that 95% of all recorded values are below 19.
You are bumping the upper threshold of a CPAP at 20. Time, playing with your sleeping conditions, and weight loss may reduce the maximum pressure needed. BiPAPs are almost twice the price of an auto titration CPAP. Unless you have rich relatives or a real good insurance policy, I'd recommend that you try working with the one you have for a little bit longer.
(09-08-2015, 03:46 PM)Mosquitobait Wrote: Yes, but that doesn't mean you need a bipap (yet). However, if your machine is closing in on 5 years, discuss with the doctor over that option. In my case, I've needed slightly higher pressures lately due to pollen and the western fires. After it rains, that night, I'm back down again. Look at your Sleepyhead data as well. If you are only briefly at 19 and you aren't having a lot of events, you really don't need a bipap as your machine can handle what you have already.
Now, my machine is currently set with an 8-12 range. I've had a few nights where its spending more time at 12, but only one night where I had increased events because it couldn't go higher. The single numbers give you an idea of what is up over time, but you can also see how LONG you are staying at that number more easily by looking at the daily sheets.
I'm still a beginner, but I'm starting to see how sleeping conditions can affect data day to day.
FYI: I'm in a titration test right now, so the machine is a loaner. I live in Canada, where due to government insurance, I will only have to pay a fixed amount for XPAP equipment. I'm just trying to become more informed about what equipment options I have so when I talk to my doctor I can have a proper conversation.
RE: Follow-Up about 95% Pressure Question
Ok, that totally makes sense.
RE: Follow-Up about 95% Pressure Question
Ramblinasian, in the U.S. the generally accepted rule is that when required CPAP pressure goes above 14 cmH2O a Bilevel is considered in order to provide greater exhale pressure relief and comfort. Some bilevel devices also have higher pressure capability. You should not hesitate to discuss the possibility of bilevel therapy, especially if you find the constant high pressure uncomfortable in any way, or if you're experiencing leaks or other problems.
CPAP pressure is usually set to the 90% pressure of an APAP trial, so you are still above a bilevel threshold, but not quite 19 cm for CPAP.
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