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[Pressure] How to Test Auto Pressure Increase
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WDP5505 Offline

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Machine: Remstar Auto A-Flex
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CPAP Pressure: 12 - 20
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Post: #1
How to Test Auto Pressure Increase
Hi. I'm new and did a search on this without finding an answer but not sure if I used the correct keywords so please forgive me if this has been asked before.

Is there a way to hold your breath or something to test whether or not that the pressure is increasing when it should? Thanks.
02-08-2013 09:52 AM
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jgjones1972 Offline

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Post: #2
RE: How to Test Auto Pressure Increase
Welcome

I posted this in another thread - it deals with a different issue, but you should be able to use the methods to do what you want to do:

When I first started APAP (before I found Apnea Board and was able to set my own pressures), I had a Respiratory Therapist who refused to set the APAP to anything but wide open. Needing high pressure while sleeping, but starting out so low, made it impossible to fit the mask comfortably, reduce leaks, get used to the pressure, etc. Knowing I needed to start at higher pressure, but clueless as to how to get into the settings menu, I had to experiment. If you start from normal breathing, then suddenly block your airway with your tongue and hold your breath it will take something like the amount of time you mention to raise pressure and you'll likely pass out before you can get it to go from 5 to 14 or so. What I found, with ResMed machines anyway (most experimentation was done with Escape Auto the DME gave me), was that the machines respond much better to realistic simulated conditions. Instead of suddenly holding your breath; close your mouth, inhale through your nose and lightly block your airway with your tongue so you simulate a light snore high in the back of your throat. With the next breath close the airway a little more and snore a little harder and simulate struggling to breath a little by randomly closing the airway completely for a fraction of a second. Struggle a little harder with the next breath, etc. With a little bit of practice I was able to get the machine to go from 5 to 20 in about 10 or 12 seconds. With a lot more practice I was able to adjust my "fake snoring" routine enough to get it to go up to pretty close to 15 and stop. The biggest problem was having to occasionally do another light fake snore while going to sleep in order to get it to stay up there.

This works with the ResMed machines I tried and I don't see why it wouldn't work with other brands of autos. You might have to experiment a little to get the "fake snore" right, and be persistent.

Please let me know if this works for you with your machine.
Sleep-well
02-08-2013 10:15 AM
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zimlich Offline

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Post: #3
RE: How to Test Auto Pressure Increase
Holding your breath generally does not help you test the machine. How are you feeling, sleeping?
What is your AHI? For lack of a better idea you can try this- set the bottom number on the machine to the same setting as the top number and see if you feel a difference, or check with a manometer. You can buy a manometer at many online cpap stores. An alternative is to have your DME check it if you have concerns about the pressure.
Good luck,
Mary
Oh, if you don't know how to change your pressure many clinical manuals are available on this site.
02-08-2013 10:30 AM
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WDP5505 Offline

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Posts: 3
Joined: Feb 2013

Machine: Remstar Auto A-Flex
Mask Type: Nasal mask
Mask Make & Model: ResMed Mirage Quatro
Humidifier: RemStar
CPAP Pressure: 12 - 20
CPAP Software: Not using software

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Sex: Male
Location:

Post: #4
RE: How to Test Auto Pressure Increase
(02-08-2013 10:30 AM)zimlich Wrote:  Holding your breath generally does not help you test the machine. How are you feeling, sleeping?
What is your AHI? For lack of a better idea you can try this- set the bottom number on the machine to the same setting as the top number and see if you feel a difference, or check with a manometer. You can buy a manometer at many online cpap stores. An alternative is to have your DME check it if you have concerns about the pressure.
Good luck,
Mary
Oh, if you don't know how to change your pressure many clinical manuals are available on this site.

Why would a manometer help? I just want to see if the pressure goes up. Also how would the AHI or how I feel be an indicator if the pressure is increasing? The pressure is set for 12 - 20 already so no need to change that either. I would think that making the two numbers equal would defeat the whole purpose because then the pressure never would rise beyond that.

(02-08-2013 10:15 AM)jgjones1972 Wrote:  Welcome

I posted this in another thread - it deals with a different issue, but you should be able to use the methods to do what you want to do:

When I first started APAP (before I found Apnea Board and was able to set my own pressures), I had a Respiratory Therapist who refused to set the APAP to anything but wide open. Needing high pressure while sleeping, but starting out so low, made it impossible to fit the mask comfortably, reduce leaks, get used to the pressure, etc. Knowing I needed to start at higher pressure, but clueless as to how to get into the settings menu, I had to experiment. If you start from normal breathing, then suddenly block your airway with your tongue and hold your breath it will take something like the amount of time you mention to raise pressure and you'll likely pass out before you can get it to go from 5 to 14 or so. What I found, with ResMed machines anyway (most experimentation was done with Escape Auto the DME gave me), was that the machines respond much better to realistic simulated conditions. Instead of suddenly holding your breath; close your mouth, inhale through your nose and lightly block your airway with your tongue so you simulate a light snore high in the back of your throat. With the next breath close the airway a little more and snore a little harder and simulate struggling to breath a little by randomly closing the airway completely for a fraction of a second. Struggle a little harder with the next breath, etc. With a little bit of practice I was able to get the machine to go from 5 to 20 in about 10 or 12 seconds. With a lot more practice I was able to adjust my "fake snoring" routine enough to get it to go up to pretty close to 15 and stop. The biggest problem was having to occasionally do another light fake snore while going to sleep in order to get it to stay up there.

This works with the ResMed machines I tried and I don't see why it wouldn't work with other brands of autos. You might have to experiment a little to get the "fake snore" right, and be persistent.

Please let me know if this works for you with your machine.
Sleep-well

Thanks I will give it a try and let you know. This is exactly what I'm trying to do. I just want to see it rise, I really don't need to do it long enough to see the top limit. Thanks.
(This post was last modified: 02-08-2013 10:53 AM by WDP5505.)
02-08-2013 10:50 AM
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zimlich Offline

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Machine: Respironics PR System One BiPap Auto SV Advanced
Mask Type: Nasal mask
Mask Make & Model: ResMed gel Nasal Mask
Humidifier: System One
CPAP Pressure: 8-20 ASV, 8 EPAP,PS 12
CPAP Software: Not using software

Other Comments: I use the Quattro FFM when necessary

Sex: Female
Location: Norfolk, VA

Post: #5
RE: How to Test Auto Pressure Increase
I don't mean to set the pressure at 20 all the time just to test if the pressure does get high. I completely misunderstood your post. The AHI is just one indicator that your treatment is working. A manometer..., well never mind I didn't understand you, do what jdjones1972 suggested.
It's best if you take what you need and leave the rest, you were told what to do, there was no need to respond to my post in which I thought you were serious about testing the pressure on the machine, not just playing around (no disrespect to jdjones1972 comprehensive, helpful and to the right point) post.
(This post was last modified: 02-08-2013 11:31 AM by zimlich.)
02-08-2013 11:31 AM
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zonk Offline

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Post: #6
RE: How to Test Auto Pressure Increase
(02-08-2013 09:52 AM)WDP5505 Wrote:  Is there a way to hold your breath or something to test whether or not that the pressure is increasing when it should? Thanks.
yes. if using auto setting, you can see the pressure breath by breath thru software pressure graph
fixed pressure setting, just shows one set pressure all night

is your Remstar, system one machine
SleepyHead support PR system one machines
02-08-2013 03:36 PM
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PaulaO2 Offline
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Post: #7
RE: How to Test Auto Pressure Increase
Why not just look at the data? If the data says the pressure went from x to z just like it should, then, yes, it is working.

PaulaO2
Apnea Board Moderator
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02-08-2013 04:59 PM
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Ugly Offline

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Post: #8
RE: How to Test Auto Pressure Increase
(02-08-2013 10:30 AM)zimlich Wrote:  Holding your breath generally does not help you test the machine.

But it does work momentarily. When I was using an S8 AutoSet II on loan I tried this. I saw it jump from 8.9 to 9.0 to 9.1 etc but not very fast and it only demonstrates that it does keep re-adjusting itself. It might be more beneficial to take readings (pressure, AHI) before going to sleep and when waking up.
02-08-2013 07:51 PM
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WDP5505 Offline

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Joined: Feb 2013

Machine: Remstar Auto A-Flex
Mask Type: Nasal mask
Mask Make & Model: ResMed Mirage Quatro
Humidifier: RemStar
CPAP Pressure: 12 - 20
CPAP Software: Not using software

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Sex: Male
Location:

Post: #9
RE: How to Test Auto Pressure Increase
Thanks everybody. I did get it to move so I know it works. I am really new to this so have lots to learn. PaulaO2 said look at the data. I didn't even know there was data to look at!
02-09-2013 11:36 AM
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archangle Offline
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Post: #10
RE: How to Test Auto Pressure Increase
On the PRS1 machine, there are several things that work.

It tends to respond "slowly." Generally it will wait a minute or two and then go up 1 cmH2O of pressure.

The most "honest" way to fake it is to "block off your nose" internally and breathe through your mouth, since you're using a nasal mask. It's a bit hard to describe, but it's sort of the same thing you do when you try to blow up a balloon. There's a "valve" at the back of your nose that will block off block off your nose.

Block off the air for 15 seconds or so, then soft of start with a "pulse" of air so it acts like you're snoring.

You can also fake snoring by making snoring noises into the mask. I find snorting noises like if you're trying to snort and clear out your nostrils.

Get the free SleepyHead software here.
Useful links.
Click here for information on the main alternative to CPAP.
If it's midnight and a DME tells you it's dark outside, go and check it yourself.
02-09-2013 04:30 PM
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