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Sierra

Sierra
Joined Jul 2018
Bio

CPAP: AirSense 10 AutoSet

Set to CPAP Fixed Mode

Pressure 11 cm

Ramp: Auto

Ramp Start: 9 cm

EPR: 2, Full Time

Mask: ResMed AirFit P10 Nasal Pillow

Canada

Sierra
Joined Jul 2018
Bio

CPAP: AirSense 10 AutoSet

Set to CPAP Fixed Mode

Pressure 11 cm

Ramp: Auto

Ramp Start: 9 cm

EPR: 2, Full Time

Mask: ResMed AirFit P10 Nasal Pillow

Canada

Because you mention EPR and CSR reporting I am assuming you have a ResMed machine? If you post the specific model of machine I could make more specific comments.

In any case your situation sounds similar to mine. I am not a medical professional, but I use a ResMed AirSense 10 AutoSet, and my apnea has been mixed central and obstructive. At the worst the CA to OA ration has been as high as 5 to one. However, overall I have been managing to keep AHI under 5. What has worked for me is do everything possible to keep pressure down. As you have found out, turning off EPR helps because the machine does not have to raise IPAP higher to address apnea that is occurring during or in the transition between IPAP and EPAP (inhale and exhale). I still use EPR at 3, but on Ramp Only. Next I narrowed the range between max pressure and minimum pressure by keeping the maximum as low as possible and by only increasing the minimum. When it got to the point where they were nearly the same, I simply switched to a fixed CPAP pressure. When I was using EPR and a wide max min range, pressures were going as high as 15 cm, and I was seeing lots of CA and some CSR. Now I have gone 6 weeks with a fixed pressure of 11 cm and AHI has a median of about 1.7. I posted a while back about my journey to fixed CPAP mode in this thread. I have been trying to determine if a bit lower or higher than 11 is better, but so far I have not found anything better. Once you go to fixed pressure about all you can do is try small steps and see what you get.

Increasing CSR indications can be a signal that there are some heart issues affecting blood circulation. It is something you should discuss with your GP if they continue.

SleepyHead is very useful in determining when and at what pressure during the night you are having central apnea and CSR events. I also find if you look at the Minute Ventilation value it is good indicator of breathing stability. Central apnea and CSR are most often the result of breathing instability when asleep. You can see it as a roller coaster ride effect in Minute Ventilation.

Hope that helps some,

Your overall AHI certainly looks good. The proportion of the RERA does seem high though, and I see it is toward the end of your sleep. Perhaps if you zoomed in (repeated left clicks on the event and or up arrow) on one the events one might be able to tell better what caused it. I like to include what is before the event so you can if there was something else going on. The timing of them may suggest simply noise in the house or lights being turned on?

You could improve your layout a bit to show more data, by going to File, Preferences, Appearance, and then uncheck the box that says something like "show the event breakdown pie chart". It just takes up space and covers up some of the more useful stuff. I also have never seen a good explanation as to the what the VS2 snore means. I think some turn it off with the switches in that box that presently shows PB on your screen, in the bottom left of the graph area. I also like to try to get more graphs on one screen by clicking on the grey dividing bars between the graphs and scrunching them up some to fit more on the screen.

In any case, you certainly do not need more pressure for apnea and hypopnea events. However if you zoom right in on the flow rate data around a RERA event you may see the top or inhale part of the curve flattened out. That can indicate flow restriction, and that may improve with more pressure. I can't quite see the lower leak curve which is the important one with a DreamStation. Sometimes I'm convinced sudden changes in leak rate can wake you up too.

You may be a good candidate to use the ResMed For Her machine. However if your machine is not old and in need of a replacement, that may be hard to justify. It is just going to raise pressure anyway, and if you are OK with the fixed CPAP mode you can do that manually. The advantage of the Auto mode is that it potentially would just raise it for the portion of the night that you need it for the RERA and leave you lower for the rest of the night. Hard to tell without actually trying it.