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

Why a sudden increase in central apneas?
(02-07-2014, 03:51 AM)igdoc Wrote: New to this forum but not new to this.
Hi igdoc, welcome abaord
How you like the machine "Sefam auto evolve"

Post Reply Post Reply

Donate to Apnea Board  
Thanks Zonk,
The SEFAM is a French APAP machine derived from the Sandman. It is small and quiet with a built in humidifier. It tries to distinguish between central (clear airway) and obstructive events but (same as other APAP devices) is not 100% accurate at this. Before discovering that I had Complex Sleep Apnea with 30 central events per hour, the SEFAM would keep pushing up the pressure because some of the events were wrongly classed as obstructive. APAP machines and CPAP induced central events don't go well together!

I have managed to avoid needing an ASV machine by using CPAP mode at a low pressure and, most importantly, by disabling the exhalation relief (CFEX, AFLEX, EPR) to reduce the hyperventilation induced central episodes.

(Sorry in my first post I missed that this topic is relatively old but hopefully still relevant to the small percentage who have high numbers of central events)
Post Reply Post Reply
Hi igdoc,
WELCOME! to the forum.!
Post Reply Post Reply
Why does bilevel (compared to CPAP) induce hyperventilation? I know that hyperventilation blows off blood CO2 reducing ones central ventilation drive. But, what is it about bilevel that induces HV?

I'm seeing some CAs; and I am wondering is I should up my EPAP pressure by 1 cm-H2O to see if this reduces CAs.

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

~ Rest in Peace ~
Post Reply Post Reply
Be sure to use SleepyHead to look at your airflow waveforms and figure out how "real" and how serious the centrals are. Sometimes the machine will flag something that's not that concerning once you look at the waveforms. Or it might be long and complete apneas that are even more worrying.

Step one would probably be to undo the changes and see what happens. Then maybe experiment with a few other changes, such as lower pressure without bilevel, and monitor AHI and centrals.
Get the free SleepyHead 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

Donate to Apnea Board  

Possibly Related Threads...
Thread Author Replies Views Last Post
  Leaks with Nasal Pillows causing Central Events J Duffy 14 148 3 hours ago
Last Post: Marillion
  ResMed AirCurve 10 VAuto vs ASV to Treat Central Apnea Ron AKA 14 251 Yesterday, 07:24 PM
Last Post: Sleeprider
  Is it safe to increase the minimum pressure of my cpap? Kalule1 13 285 04-16-2018, 05:53 PM
Last Post: Sleeprider
  Central while on ASV Boodmaster 10 322 04-16-2018, 03:07 PM
Last Post: Hojo
  Apneas just as falling asleep? Nancy S 15 536 04-10-2018, 09:02 PM
Last Post: Mogy
  What Resmed Machine for BPAP with Many Central Apnea events? bcorlando 9 285 04-03-2018, 12:44 PM
Last Post: dmeRT
  New Guy, Central Sleep Apnea, wrong machine? Boodmaster 83 3,861 03-31-2018, 01:15 PM
Last Post: Boodmaster

Forum Jump:

New Posts   Today's Posts

About Apnea Board

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