Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account

New Posts   Today's Posts

[Equipment] What I have learn about my machine
What I have learn about my machine
I run my S9 VPAP Auto in spontaneous mode (S mode.)
In S mode, it operates between two set pressures -- IPAP and EPAP.
That is the mode I was prescribed.

There is a setting in S mode called Easy Breathe.
Let's call that EB. With EB turned on the rise time, for the transition to IPAP pressure is grayed out. With EB off, the rise time can be set. It defaults to 300 msecs.

What's interesting is -- with EB off, the FOT algorithm is off; and it does not differentiated between obstructive and central apnea. Also, the snore index and flow limitation are not recorded.

Last night, with EB on, I slept 7.5 hours; had an AHI of 1.8 and had one 10 second clear airway event scored as a central.

There was significant snoring; and flow limitation. Flow limitation is based upon the inhalation waveform. Rounded is good, flat-top is scored as obstruction a flow limitation.

Taking a look at the fine flow data, the snoring appears to be during exhalation when the machine has switched to EPAP pressure.

I wonder if bumping up the EPAP pressure a bit would help that?
I think I might bump it up by 0.4 cm-H2O tonight and test the hypothesis.

Admin Note:
JustMongo passed away in August 2017
Click HERE to read his Memorial Thread

~ Rest in Peace ~
Post Reply Post Reply

Donate to Apnea Board  
RE: What I have learn about my machine
Interesting Mongo,

I too was prescribed bilevel CPAP. I recently tried using auto mode to reduce the average pressure and the leakage. The machine lowered my average pressure and my leakage was somewhat better but my AHI went up significantly. Had a lot of hypopnea and increased apnea events. Of course, with my antique machine, it does not differentiate clear airway events from obstructive events. Went back to my original prescription of 20 IPAP, 16 EPAP and my AHI is much better and the leaks are reasonable (less than 24 l/min).

Best Regards,


Admin Note:
PaytonA passed away in September 2017
Click HERE to read his Memorial Thread

~ Rest in Peace ~
Post Reply Post Reply
RE: What I have learn about my machine
I too have (as you know) an older machine that can't 'see' CAs. I too switched to 'auto' mode, but with a much different result.

Originally, in 'S' mode, EPAP was '12', and IPAP was '18'. And I lived with that for a number of years, using a nasal mask strapped on tight, and lived with random (many to most nights) mouth hissing - to the point of having a sore mouth that spicy food (Taco Bell level) burned.

Switching to wide open Auto mode (which can only raise/lower both modes, "PS" doesn't change) with a Pressure Support of '6', my IPAP dropped down to around 12 to 14. Currently, I have IPAP at '6.4' and PS at '6.6' (gives an IPAP of '13'), and most nights max pressure stays around 13-14 with somewhat random hops up to '18' 2-3 times weekly. My AHI last night was '2.0', and my 95% leak rate was '10'LPM. At this point, this is also using a FFM only, and I am not seeing any reason to change any settings.
*I* am not a DOCTOR or any type of Health Care Professional.  My thoughts/suggestions/ideas are strictly only my opinions.

"Only two defining forces have ever offered to die for you. Jesus Christ and the American Soldier. One died for your Soul, the other for your Freedom."
Post Reply Post Reply

Possibly Related Threads...
Thread Author Replies Views Last Post
Exclaimation CPAP Machine Choices - read this before you accept a new machine SuperSleeper 150 141,952 03-22-2020, 01:43 PM
Last Post: Sleepster
  machine died! Now new doctor and new machine Bjazzman 14 3,450 06-27-2019, 10:51 PM
Last Post: camper2
  How important is having a CPAP professional ? Is it impossible to learn CPAP without AliceF 17 1,395 11-19-2018, 10:32 AM
Last Post: Fats Drywaller
Question Review first night values so I can learn to interpret my own data willo 7 681 11-14-2018, 09:16 AM
Last Post: Sleeprider
  Does your brain learn not to mouth breathe? HalfAsleep 43 5,316 07-03-2018, 02:33 PM
Last Post: alankittner
  Pin from power plug stuck in machine ResMed cpap machine B10576 12 3,411 04-08-2018, 08:24 PM
Last Post: Hellodare
  where can i learn about all this software stuff ? xxyzx 6 858 04-05-2017, 09:45 PM
Last Post: Melman

New Posts   Today's Posts

About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.