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md0

md0
Joined Apr 2019
md0
Joined Apr 2019

Hello everybody,

I would like to ask your opinion on the result of a recent PSG study done in order to investigate a possible cause for my poor sleep quality.

I'm 42, BMI 23.1, normal BP, no snoring, no alcohol consumption. I do experience occasional day sleepiness and don't feel rested / refreshed upon waking up. I only sleep for 5-6 hours/night and have a severe circadian rhythm offset (ASPD).

The PSG revealed a moderate AHI of 19.6, with 48 OA and 2 CA events. This would not be unusual in any way, except for the fact that the average OA event duration was very long (at 42.2 seconds) and SpO2 desaturation was lower than expected for such long events (only 1 minute in total below 90%). The signals also revealed a rather unusual pattern, repeated for almost the entire duration of the N2 stage (image 1), with periodic (very) gradual drops in flow pressure, but discernible thoracic effort (images 2&3).

My GP was unable to explain the phenomenon, or how a supposedly obstructive event can be triggered in such a gradual fashion, and with such frequency. My personal opinion is that I was not actually experiencing classic OSA, but something else, that I cannot fully understand or explain. Did any of you ever had similar events?

Hint: may be related to a second type of recorded apneic events (image 4), that occured exclusively during REM and which I believe to be catathrenia (since there is no drop in SpO2 and it sometimes happens while awake (and I'm often times aware of it).

Thank you!