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[Pressure] Max Pressure Still Having Obstructive Apneas
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Don11 Offline

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Posts: 1
Joined: Apr 2015

Machine: Resmed S9 Auto
Mask Type: Full face mask
Mask Make & Model: Fisher and Paykel Forma Full Face
Humidifier: H5I
CPAP Pressure: unsure
CPAP Software: ResScan

Other Comments:

Sex: Male
Location:

Post: #1
Question Max Pressure Still Having Obstructive Apneas
Hello, my dad has a Resmed S9 Autoset with a F+P Forma full face mask. Looking at his data I noticed a few weeks ago it was maxed out at 20cm H2O and over a 15 minute period he registered 5 obstructive apneas of
65, 67, 104, 94, and 112 seconds. The total leak for the duration averaged about 10-13 l/min with short spikes lasting a couple of seconds up to around 20 l/min or so coinciding with the events.

These events look really dangerous.
Can too high of a pressure CAUSE obstructive events?

Or is the pressure not high enough to prevent the obstructions?

Is the leak too much despite the green smiley face?


Any help would be greatly appreciated!
(This post was last modified: 05-14-2015 07:49 PM by Don11.)
05-14-2015 07:42 PM
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Sleeprider Online
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Advisory Members

Posts: 3,340
Joined: Dec 2014

Machine: Resmed Aircurve 10 Vauto
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: Resmed Climateline
CPAP Pressure: Auto Bilevel 18/9, PS 3
CPAP Software: ResScan SleepyHead EncoreBasic

Other Comments:

Sex: Male
Location: Where they make Respironics

Post: #2
RE: Max Pressure Still Having Obstructive Apneas
With 20 AHI at maximum pressure, I'd refer back to the doctor. The times being recorded are extremely long periods and without oxygen data we can't say those are valid. Ever try to hold your breath for over a minute and a half? In addition to the recorded event, I'd be looking for recovery breathing to validate the apnea. Sleepyhead, a free program linked above on this forum, can give much more data about the events and it might be worth taking a look at his therapy data.

I agree apneas of that duration are potentially dangerous to his health if they are real. Welcome to the forum. This is a great place for information, but we don't replace the need to bring more serious matters to the attention of your doctor.

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05-14-2015 08:16 PM
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trish6hundred Offline

Advisory Members

Posts: 6,436
Joined: May 2012

Machine: Resmed S9 AutoSet for Her
Mask Type: Full face mask
Mask Make & Model: Fisher & Paykel Simplus
Humidifier: H5i Heated Humidifier
CPAP Pressure: 10 - 7-20 Cm H2O
CPAP Software: Not using software

Other Comments: I started CPAP in 2008. Totally blind since birth.

Sex: Female
Location: Missouri, USA

Post: #3
RE: Max Pressure Still Having Obstructive Apneas
Hi Don11,
WELCOME! to the forum.!
Hang in there for more suggestions and answers to your questions and much success to you and your dad.

trish6hundred
05-14-2015 08:32 PM
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trailrider Offline

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Posts: 304
Joined: Feb 2015

Machine: A10 Autoset for Her
Mask Type: Nasal mask
Mask Make & Model: Eson or P10
Humidifier: autoset
CPAP Pressure: 6-12 DME, 7-13 me
CPAP Software: SleepyHead

Other Comments: engineer. EPR at 3, unheated hose, humidity at 2. Routine hose entanglement.

Sex: Female
Location: Ontario

Post: #4
RE: Max Pressure Still Having Obstructive Apneas
Those large leaks might be if he had his mouth open. The air gets pushed in the nose, and then rushes right back out the mouth. Also, if he is awake and talking with the mask on it will read like an apnea event. The nasal passage is closed to the air (obstruction), but he's actually breathing. The machines cannot tell if you are awake. And then the pressure gets jacked up to deal with the (non) event.

I do this regularly; nattering at my husband while masked up. I just ignore the data from the times I know I'm awake. Unsure
(This post was last modified: 05-14-2015 09:58 PM by trailrider.)
05-14-2015 09:56 PM
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OpalRose Offline

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Posts: 3,168
Joined: Nov 2014

Machine: PR System One REMstar Auto 560 with A Flex
Mask Type: Nasal pillows
Mask Make & Model: AirFit P10 For Her
Humidifier: REMStar heated humidifier with heated hose
CPAP Pressure: Auto Cpap 10-13 AFLEX 1
CPAP Software: SleepyHead EncoreBasic

Other Comments: Started CPAP Therapy October 23, 2014

Sex: Female
Location: Northeast Ohio, USA

Post: #5
RE: Max Pressure Still Having Obstructive Apneas
(05-14-2015 07:42 PM)Don11 Wrote:  Hello, my dad has a Resmed S9 Autoset with a F+P Forma full face mask. Looking at his data I noticed a few weeks ago it was maxed out at 20cm H2O and over a 15 minute period he registered 5 obstructive apneas of
65, 67, 104, 94, and 112 seconds. The total leak for the duration averaged about 10-13 l/min with short spikes lasting a couple of seconds up to around 20 l/min or so coinciding with the events.

These events look really dangerous.
Can too high of a pressure CAUSE obstructive events?

Or is the pressure not high enough to prevent the obstructions?

Is the leak too much despite the green smiley face?


Any help would be greatly appreciated!


What pressure is your S9 set at? You said it was maxing out at 20. Is the machine set on auto with a pressure range? What has the total AHI readings been?

If you could download SleepyHead software, then it would be easier to look at the events on a graph and see where his pressure is. The leak rate sounds like it is within acceptable limits.

Too high of a pressure does not cause obstructives, but could cause clear airway events in some people. That's why it's important to look at the total picture from the SleepyHead software. Let us know how he is doing.

OpalRose
05-15-2015 10:26 AM
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