AHI only measures stops of 10 seconds or more

Only on Hacker News would someone picture an oscillating waveform with a derivative of 0 twice per cycle! (I'm just poking fun)

Remind me never to ask HN to check if my indicators are working.

Yes, no, yes, no, yes, no…

There seems to be an intermittent fault.

Define "working"?

it's not a bug; it's a feature!

"A breath is a breath, you can't say it's only a half"

Okay there, TA "89" 03... ;)

Not for the AHI's purposes, no. It has to stop for a certain length of time to be counted.

In the US at least I think this time is usually 10 seconds.

https://www.cms.gov/medicare/coverage/evidence/cpap

Yep, mine is ~79 (at least, ten years ago it was)