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Follow-Up about 95% Pressure Question
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ramblingasian Offline

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Machine: Resmed Aircurve10 VPAP Auto
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CPAP Pressure: IPAP 16, EPAP 12
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Sex: Male
Location: Toronto, Ontario, CANADA

Post: #1
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!
09-08-2015 02:31 PM
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Crimson Nape Offline

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Machine: ResMed S9 Autoset
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Location: Georgia

Post: #2
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.

Statistics prove that people who have more birthdays live longer.
09-08-2015 03:20 PM
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Mosquitobait Online

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Joined: Apr 2015

Machine: Resmed AirSense 10 For Her
Mask Type: Nasal pillows
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Humidifier: integrated, Climate line tube
CPAP Pressure: 9-12
CPAP Software: ResScan SleepyHead

Other Comments: RLS and Bradycardia

Sex: Female
Location: Minneapolis

Post: #3
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.
09-08-2015 03:46 PM
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ramblingasian Offline

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Posts: 56
Joined: Aug 2015

Machine: Resmed Aircurve10 VPAP Auto
Mask Type: Nasal mask
Mask Make & Model: F&P Eson
Humidifier: Integrated
CPAP Pressure: IPAP 16, EPAP 12
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location: Toronto, Ontario, CANADA

Post: #4
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.
09-08-2015 03:56 PM
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Mosquitobait Online

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Posts: 746
Joined: Apr 2015

Machine: Resmed AirSense 10 For Her
Mask Type: Nasal pillows
Mask Make & Model: Airfit P10
Humidifier: integrated, Climate line tube
CPAP Pressure: 9-12
CPAP Software: ResScan SleepyHead

Other Comments: RLS and Bradycardia

Sex: Female
Location: Minneapolis

Post: #5
RE: Follow-Up about 95% Pressure Question
Ok, that totally makes sense.
09-09-2015 08:50 AM
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Sleeprider Online
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Post: #6
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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09-09-2015 08:58 AM
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