My guess = this screams apnea-related desaturation, but relatively minor (but still of concern). I'm also guessing that my DME's setting of 12 at the top range wasn't correct - but she doesn't have the SpO2 data yet... which brings me to:
My Airsense 10 didn't score a single AHI last night. At all. I'm assuming that since the Airsense 10 doesn't know about the SpO2 numbers, there are likely some events (maybe a lot of events) which aren't being scored which would be if it had direct SpO2 access?