I just finished my 10th night on CPAP with 100% compliance. Thus far, I have been fortunate in that my AHI has been consistently [Edit] 0.24 or lower (only one night of .24 and one night of 0.16--I'm usually 0.1 - 0.13).
After getting what I thought was a pretty good night's sleep, I was surprised to see my ResMed show AHI reading 1.6. I had to look twice to make sure I saw the decimal in the right place. I then checked MyAir site and it showed 1.6 in larger numbers LOL.
So, I decided to pull the SD card and see what the heck happened because the night before I registered my first 0.0 AHI in a session greater than 7.5 hours.
I import last night's data and it shows an AHI of 0.12 with one OA at 6:45 AM.
Here is last night's stats from SleepyHead:
Details Most Recent
Average Hours per Night 8:30
Obstructive Index 0.12
Hypopnea Index 0
Clear Airway Index 0
RERA Index 0
Average Leak Rate 0
90% Leak Rate 0
% of time above Leak Rate threshold 0.00%
Average Pressure 7
Min Pressure 7
Max Pressure 7
90% Pressure 7
MyAir also shows 2 mask offs which is odd as last night was the first time since starting my cpap therapy that I didn't have to get up to use the restroom and as I can tell, I didn't take my mask off and put it back on twice last night.
My nostrils are irritated, a little red, and sore. I am guessing there was some movement of the pillows last night which may have registered as a mask off instead of a leak (0.0 leaks last night).
I assume the SD card data is authoritative and there isn't some bug in SleepyHead which would cause to report some but not all of the events (would be very odd bug to report one out of an estimated 13.6 events).
I am not overly concerned about it, but I would like to understand this phenomenon more.
Does anyone know why there may be a discrepancy? It really doesn't seem to make sense that that the data the machine displays and transmits to MyAir is so different than what is recorded on the SD card.
Thanks in advance. You all have been very helpful and patient with my questions thus far.