Sierra

An AHI of 0.2 is excellent. It is possible your pressure could be lowered some although 10 is not that high. How did you end up with a fixed set pressure? The other option you have would be to put the machine in Auto and allow it a max pressure of 10, and perhaps minimum or 7 or so.

One other thought. Did you set the new machine up yourself? I believe the default setting for an AutoSet is to be in Auto mode. Is it possible you have it in Auto with a minimum pressure of 5 and max of 10?

One other thought. If you still have the S9 machine and more importantly the SD card in it, what you should do is first download the data from the S9 into your OSCAR program. Next you can download the data from the AirSense 10 machine. Then you will be able to go back through your S9 sessions and see in detail how it was behaving. And, you will be able to compare that to what you are getting now with the AirSense 10. OSCAR is smart enough to recognize both machines and display the data from both.

I should have asked you earlier, but what are your AHI numbers like? With the Essentials turned to Plus, you should be able to see an average of all the data you have collected to date with a breakdown of the obstructive, hypopnea, and central apnea events. You can set the time interval that the data is averaged over.

I also have an AutoSet machine and have it set for a fixed pressure, which in my case is 11 cm. I have issues with central apnea and have found that if I use a fixed set pressure the machine does not get carried away and increase the pressure too much and cause even more CA events.

I do have my machine set up a little different though. The AirSense has more features than the S9 (which is the machine my wife still uses). One is the AutoRamp feature. I use it and like it. It monitors your sleep and ends the ramp automatically when it decides you are asleep (to a maximum of 30 minutes). It is not really a ramp as it just maintains the pressure at a fixed value that you set with the Ramp Start pressure. I find 5 cm is much too low for me as a ramp pressure, and I currently have mine set at 9 cm. I like to be able to breathe deeply without feeling that air flow is restricted.

The other thing I do is set the EPR to 3 cm, and further set it to Ramp Only. This way during the ramp I get 9 cm on inhale, and 6 cm on exhale. I find that more comfortable when I am going to sleep. When it decides I am asleep it switches to a fixed 11 cm, and stops the EPR, so inhale and exhale pressure are both at 11 cm. The benefit to that is that it can reduce obstructive apnea events which can start during the exhale phase of each breath. It allows for a lower set pressure which is more comfortable and at least for me avoids some of the central apnea events.

I hope that helps some. If you have any questions just ask. This is an example of what you can see with OSCAR. I am still using the previous version called SleepyHead, but it is very similar to OSCAR.

The model name should be on the front bottom right of the machine. The four models are CPAP, Elite, AutoSet, and AutoSet for Her. I believe all of them save detailed data except for the CPAP model. You can download OSCAR at this link. It requires a PC or Mac, and a SD card reader.

You can also set your machine to display a more detailed sleep report on the display itself. You have to set the "Essentials" option to plus. See page 17 & 19 in this AirSense Technical Manual.

Which specific model of AirSense 10 is it? If it is a model that keeps detailed data on the SD card you could look at the data using OSCAR software to see if there is anything unusual. Have you tried using your old mask with the new machine to see if it could be a mask issue?

This forum is about sleep apnea. Your comments do not seem to be on topic. But since you ask, I would not touch bitcoin with a 10 foot pole.

I have not had that happen, but my wife has when she uses the 12 volt to 24 volt DC adaptor when we are camping. I tracked it down to a defective power supply. It seems that it has an overload "protector" built into the adaptor that is defective or set too low. I don't know if there is something similar built into the normal AC to 24 volt adaptor, but it might have. I would also check your power connections while you have the mask on and the machine running. Try wiggling each connection to see if you can find one that might be defective.

I have made a further modification to my Swift headgear that I use on my P10. The back strap was slipping up during sleep. After trying a few things I used Shoe GOO to glue a strip of the hook side of a Velcro strip to the inside of the back strap. It is a little aggressive for grip now and you have to take it off carefully/slowly to keep from pulling your hair out. However it does not slip any more!!!

Oh, and just post one screen shot at a time, or your post can get delayed.

From what I can see you have a whole series of CA events late in the night. Your AHI of course goes up with each additional event. The graphs you have provided are just parts of the needed information to see what is going on. In OSCAR with a PC all you have to do when you have the page setup optimized is press F12 and it will do a screen capture and safe the image file. Watch in the lower right and it will show where the file is saved. Then with file explorer you can drag that file into an open message here. I will attach one of my files to use as an example of what I think is a useful layout.

This said, the number of CA events you are having is a concern. You must end up with a very high AHI. The normal target for AHI is <5. My suggestion would be that the machine is not set up properly for you, and you should be talking to your provider. Your pressures are low, but increasing pressure is not an obvious solution as increased pressure can increase CA events, not reduce them. Increased pressure is typically only effective in reducing OA or obstructive events.