On 2/22/2019 I had an AHI of 55 with TTIA of 42 minutes and barely any leaks. My SPO2 watch with finger sensor woke me up. The low SPO2 alarm is set to 92. When I woke up it was 72. I was only awake long enough to go back to sleep. The next morning I downloaded the CPAP and SPO2 data into SleepyHead...