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] A Cast of machine running wild?
#1
A Cast of machine running wild?
OK Here is another case of the machine running wild, like it has a mind of its own..

I can see NO reason for the base pressure changes, nor the high pressure it started doing at the end of this sleep cycle and it woke me up.

[Image: MOIO78_zpse6c29038.jpg]

Rich
Post Reply Post Reply
#2
RE: A Cast of machine running wild?
The machine looks at a lot more than just whether you have an apnea event or not. It's not quite clear what it looks at, but it probably looks at the "squareness" of the airflow waveform, respiration rate, tidal volume, etc. It apparently looks at some partial snoring and flow limitations that don't show up as events.

The exact details are probably company secrets.

Some of the newer APAP machines are pretty good at adjusting the pressure upwards before you actually experience an apnea. I think they look for changes in the airflow waveform shape.

The ASV machines may also decide to pump up the pressure instantly to stop a central apnea in progress. If it succeeds, it may not record a CA in the log.

If you look at the airflow and pressure waveforms at the points where it increased pressure, you may find some disturbed breathing.

Or it may just be running away.
Get the free OSCAR CPAP 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.
Post Reply Post Reply
#3
RE: A Cast of machine running wild?
There is a bit of information on the ResMed site for their AutoSet machine here. Open up the answer to "How do AutoSet devices know to adjust pressure?".
Post Reply Post Reply
#4
RE: A Cast of machine running wild?
(07-09-2013, 06:43 PM)RonWessels Wrote: There is a bit of information on the ResMed site for their AutoSet machine here. Open up the answer to "How do AutoSet devices know to adjust pressure?".

he doesnt have a resmed autoset machine but maybe it will help "learn" him something about auto pressures on devices?


and that doesnt look like a machine gone wild to me..looks like your autosv automatically ramped up the pressure to where it sensed it needed to be,,which is what is is exactlysupposed to do and why you bought it.

your ahi ca,oa, hyp are all still looking good.....your graph doesnt look so much diffeent from mine every night I have used it so far and we have the same machine
I don't believe anything I hear and only half of what I see
Post Reply Post Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  Fan is running but no pressure from Dreamstaion Fireboss 2 45 5 hours ago
Last Post: Sleeprider
  iNAP First Night Test Tonight (Running with APAP) Apnea23 4 1,216 01-21-2024, 10:32 PM
Last Post: scowell
Exclaimation CPAP Machine Choices - read this before you accept a new machine SuperSleeper 283 262,189 11-10-2023, 10:24 AM
Last Post: robbob2112
  Adding a true HEPA filter to APAP for california wild fire smoke Stom 25 5,805 03-23-2023, 09:15 AM
Last Post: JLRINCT
  AirSense 10 gone wild. ejbpesca 10 1,247 03-07-2023, 09:30 AM
Last Post: gdahl
  Resvent iBreeze error "Turbine running abnormally" bedroomsinger 2 12,126 02-01-2023, 01:52 PM
Last Post: cturner
  Dry Mouth, running out of humidifier water sailon1 18 10,299 12-05-2022, 07:18 PM
Last Post: narual


New Posts   Today's Posts


About Apnea Board

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