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

[Treatment] Fine Tuning - What's the cause of these hypopnea events?
Here's a snapshot from SH from a typical night (last night, to be exact):


This shows a period of about 30 minutes during which my machine up'd the pressure several times in response to minor flow limitations, eventually maxing out at 20 and waking me up. I have several episodes similar to this every night - last night, there were 4 - two that woke me up and two that did not.

I'm trying to assess what might be causing these periods, whether they're anything to be concerned about, and what, if anything, I might want to do about them.

Working theory: these are periods when I roll over onto my back.

If you look at about 2:16 AM, there's a CA and a mini-hypopnea - this pattern looks very much like what's seen at 2:43 AM (just after re-starting). At 2:43 I know I was awake - was I awake (albeit briefly) at 2:16 as well?

Between 2:16 and 2:27, it looks like I'm sleeping peacefully, then a series of pressure bumps starts, with each bump followed by a period of adjustment in my breathing, culminating in a series of OA/H that drive the pressure up to max until I awake at 2:41.

So, what do you think? I'm planning on trying out some of the pillow-devices that prevent rolling over onto my back. I'd also like to get a logging oximeter to see what sort of desaturation I'm seeing associated with these periods (if any). Any other ideas for pinning down what's really going on during these periods?


Post Reply Post Reply

Donate to Apnea Board  
Looking at both flow limitation and flow rate, you are experiencing diminished flow at those times.
And, your pressure is really ramping up as you noted.

I think your working theory is sound; and keeping off your back is worth trying.

I usually side sleep for that reason. I'm able to stay on my side for the night.

There have been several methods talked about on the board for preventing rolling on the back.
One method was sewing tennis balls in the back of a tee-shirt.
Whatever it takes...



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

~ Rest in Peace ~
Post Reply Post Reply
I agree with justMongo. I doubt that you O2 sat will be doing much as it looks like you have some serious recovery breathing after each event. O2 in your system just does not drop al that fast
Post Reply Post Reply
(12-07-2015, 10:52 PM)PoolQ Wrote: I agree with justMongo. I doubt that you O2 sat will be doing much as it looks like you have some serious recovery breathing after each event. O2 in your system just does not drop al that fast

That's what I figure too - but I'm a data nerd, so I'll get the Oximeter and find out for sure. I'll be very surprised if there's much (if any) noticeable desat during those short events.

Thanks for the note Smile
Post Reply Post Reply

Possibly Related Threads...
Thread Author Replies Views Last Post
  Plotting OA events vs time Bripin 5 155 Yesterday, 12:43 PM
Last Post: Bripin
  advice to fine tune sleep Kosoku 16 509 03-19-2018, 12:34 PM
Last Post: Sleeprider
  RERA events after increase of minimum pressure MisterM 9 209 03-07-2018, 07:24 AM
Last Post: ajack
  Machine settings advice for my report [central events] airoutlaw 15 426 03-05-2018, 08:16 PM
Last Post: trish6hundred
  How long are your OA/UA/CA events? Do they cause heart palpitations/racing heart? MyronH 5 233 02-23-2018, 05:04 AM
Last Post: holden4th
  Leaking reduced but events up? Solar Rays 5 237 01-27-2018, 07:08 AM
Last Post: Sleep2Snore
  [Symptoms] Increase in apnea events chay5301 6 295 01-27-2018, 01:37 AM
Last Post: ajack

Forum Jump:

New Posts   Today's Posts

About Apnea Board

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