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

[CPAP] Much higher AHI with a full face mask
#11
Related to my last post, here is the graduate course in CPAP and BPAP therapy principles.



Post Reply Post Reply
#12
Nice Thanks
Sleeprider
Post Reply Post Reply
#13
Thanks, Sleeprider. I dropped PS to 3 and increased min EPAP to 6 and max IPAP to 11 and even though the leakage was a bit worse, the AHI did come down further. It seems like the increase leakage coincided with an increase in pressure. Should I think about increasing max IPAP further?

BTW, your rather cogent explanation about the relationship between EPAP/IPAP/PS to obstruction, ventilation, CA, OA mostly flew over my head :-)! Is there a good book or a document that explains these fundamentals? I'd love to understand it all a bit better!

Thanks in advance!

[Image: jLWn2vCl.png]
Post Reply Post Reply


#14
This looks great! I don't have any problems with taking IPAP max to 12, but controlling the leaks is a higher priority.
Post Reply Post Reply
#15
Thanks for the video, Sleeprider.

I bumped up the IPAP to 12, did a bit more strap tightening and the charts look good with an AHI of 0.28! Thanks for everyone's help!

Do you think any further tweaking is warranted?

[Image: 0Orma6Dl.png]
Post Reply Post Reply
#16
Looks really good to me. There are very few events, spaced throughout the night.
                                                                                                                                                                                  
Please organize your SleeyHead screenshots like this.
I'm an epidemiologist, not a medical provider. 
Post Reply Post Reply


#17
BTW, is this leak rate acceptable - average of 5.99L/min, median of 4.8L/min with essentially no large leaks? Realistically, I am not sure that with the current Dreamwear mask (which I like a lot) that I can reduce it any further!
Post Reply Post Reply
#18
Looks perfect. Also, you should understand that there will be higher rates of events on many nights, but you're dialed in. Keep it. You main problem early on was EPAP too low and too much pressure support. In theory you should be able to increase IPAP and the machine will only use what is needed for obstruction. I rarely hit my IPAP max. Good job on controlling leaks. Your original graph was really a sight, and you've come a long way!

[Image: attachment.php?aid=3173]
Post Reply Post Reply
#19
It's been an interesting week. I worked on sorting through the leaks on my Dreamwear mask. I made some decent progress and this chart for Thursday night seems to be pretty good from a numbers perspective:

[Image: 7nonXGNm.png]

The problem was that despite the good numbers and apparently a reasonable number of hours of sleep, I felt sleepy and lousy throughout the day on Friday (as bad as a typical day before I started my CPAP therapy) which left me pretty puzzled.

For last night, I decided to go back to the AmaraView FFM, bumped up EPAP by 1 cm (to 7.0), slept on my side on a high pillow. I've had a stiff neck for the past few days and the high pillow was causing neck issues so at around 5:20 am, I switched back to the Dreamwear nasal pillow. Here's the chart for it:

[Image: zMGTmZxm.png]

In general, the AHI with the FFM was a lot better last night (1.72) than the previous time (the chart in Sleeprider's last post where the AHI was 18.57!). Most of the events with the FFM seem to be Hypopneas. Any suggestions on changes to reduce/eliminate those would be appreciated.

I noticed that the IPAP was a lot closer to the max (12.0) with the FFM than with the Dreamwear. Should I increase the max IPAP or the min EPAP any further?

Thanks in advance!
Post Reply Post Reply


#20
With a full face mask, it would not be out of line to increase pressures 0.6-1.0, but your event rate under 2 is not a big problem, and the important thing is to look after your comfort. Your images are way too small to be useful. Not sure what you did, but they are only 320 x 400. It looks like the night with the lower AHI (Friday?) had a lot of mask leaks, so that would explain your sleep disruption.
Post Reply Post Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  [Treatment] Doctor wont raise settings higher... what now? sw33ttsunade 34 1,261 10-19-2017, 04:14 PM
Last Post: SarcasticDave94
  ResMed F20 full mask memory foam Teddysjam 10 481 10-19-2017, 06:16 AM
Last Post: scottmallen
  Do People Not Like Full Face Masks? STB123 14 460 10-12-2017, 11:49 PM
Last Post: CB91710
Grin [Equipment] Dry Mouth from Full Face Mask NB500 2 232 10-06-2017, 07:42 PM
Last Post: Hojo
  ASV users - effects of higher pressure vs CPAP? Stevie1under 7 287 10-05-2017, 05:47 PM
Last Post: Stevie1under
  Full face or nasal mask for 19/14cm? kestrel 10 411 09-27-2017, 11:57 AM
Last Post: Walla Walla
  Full Face Masks vs. Nasal masks Haynbo 12 516 09-23-2017, 01:36 PM
Last Post: zzzZorro

Forum Jump:

New Posts   Today's Posts




About Apnea Board

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

For any more information, please use our contact form.