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Anybody know what these pressure pulses are for?
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surferdude2 Offline

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Posts: 1,077
Joined: Jul 2014

Machine: ResMed S9 AutoSet
Mask Type: Full face mask
Mask Make & Model: Mirage Quattro & Optilife
Humidifier: ResMed H5i @ #3 if nose breathing & #5 if mouth breathing
CPAP Pressure: 12 ~ 20 & 11 ~12 if nasal mask
CPAP Software: ResScan SleepyHead

Other Comments: Late stage 2 emphysema

Sex: Male
Location: Mousetown, Southern Illinois

Post: #11
RE: Anybody know what these pressure pulses are for?
Some things may never have a logical explanation. Reporting this anomaly and checking for any opinions is the right thing to do. I don't suggest you ignore it altogether but do suggest that you enjoy the fact that the therapy is doing what it needs to and you are free from OA's, CA's and Hypops. It would be nice to have an answer but it may not happen. It may just be some software anomaly or some machine firmware problem, who knows at this stage.
06-13-2015 03:59 PM
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PaulaO2 Offline
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Posts: 8,067
Joined: Feb 2012

Machine: S9 Autoset
Mask Type: Full face mask
Mask Make & Model: F&P Simplus
Humidifier: H5i
CPAP Pressure: 14-20
CPAP Software: SleepyHead

Other Comments: Ehlers-Danlos Syndrome, Hypermobility Type; chronic sarcasm

Sex: Undisclosed
Location: western NC, USA

Post: #12
RE: Anybody know what these pressure pulses are for?
If you are sleeping good and feeling good with the pressure setting you have, and your AHI is less than 5, and the only "symptom" is that weird alien blip, leave it. Keep watching it but unless something happens, don't be overly concerned about it.

If you are not doing one or more of those above things, then let's see what else is going on and try to help you with it further.

As for changing it to straight CPAP for just one night, that's not enough time. That's just one night. Unless you were absolutely miserable all night and can definitely say it was the CPAP setting that did it, leave it alone. Give it at least a week to see how it goes.

PaulaO2
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06-13-2015 06:48 PM
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quiescence at last Offline

Advisory Members

Posts: 753
Joined: Nov 2014

Machine: REMstar System One with Autoflex
Mask Type: Full face mask
Mask Make & Model: Quattro AirFit F10
Humidifier: yes typical setting = 4
CPAP Pressure: 5-13 Autotritrating CPAP
CPAP Software: SleepyHead EncoreBasic

Other Comments: CMS-50F Plus oximeter /w SPO2 Assistant software. Avowed mouth-breather switching to nose-breathing

Sex: Male
Location: US

Post: #13
RE: Anybody know what these pressure pulses are for?
The PRS1 device that I have (Model 560) and all the others I have ever seen has a periodic analytical pressure shift that ramps up over 3 minutes and then ramps back down over 1 minute. It happens about every 9 minutes. I am surprised yours is not similarly shaped.

Each pressure change command is represented by PRS1_01, so one occurs at each shift. So there are three of these in the waveform you captured - http://i.imgur.com/XQv1xOJ.png.


An example from my history is shown below, seven occur in the hour between 22:20 and 23:20.

[Image: n9IvpFP.png]

Dedicated to QALity sleep.
You'll note I am listed as an Advisory Member. I am honored to be listed as such. See the fine print - Advisory Members as a group provide advice and suggestions to Apnea Board administrators and staff concerning Apnea Board operation and administrative policies. Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.
06-14-2015 11:31 PM
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Terry Offline

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Posts: 553
Joined: May 2014

Machine: Philips Respironics RemStar Auto with A-Flex (560P)
Mask Type: Nasal pillows
Mask Make & Model: P/R Nuance & Pap Cap
Humidifier: Integrated
CPAP Pressure: Auto
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location:

Post: #14
RE: Anybody know what these pressure pulses are for?
(06-13-2015 06:48 PM)PaulaO2 Wrote:  If you are sleeping good and feeling good with the pressure setting you have, and your AHI is less than 5, and the only "symptom" is that weird alien blip, leave it. Keep watching it but unless something happens, don't be overly concerned about it.

I'm not concerned about it, just interested, especially since they correlate with an undocumented data channel. It would have been nice to be able to name it and update SleepyHead.

I was hoping someone who is good at reading the flow would look at it and say "sure, that's just marking the <whatever> events"

Also, if they didn't actually serve any purpose, I would have set my machine for straight 15 with no auto, however they do seem to be doing something.
06-15-2015 11:21 AM
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