I haven't waken up for the whole night, and I am pretty sure I don't sleep walk.
So what could be the cause?

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Respironics BiPAP Auto M Series with Bi-Flex, heated Humidifier and SamrtCard (DS700HS)
IPAP 18 cmH2O/EPAP 14 cmH2O
Respironics FullLife mask, medium
Wrist Pulse Oximeter CMS-50F

