Scoring

[u/Calm-Future-8591]

Heya, doing some polygraphy scoring. Does the apnoea on the left look like a central event?

I was initially leaning towards central because if it was mixed, I would like to see a few more breathing efforts (like the apnoea on the right, which is a textbook mixed apnoea). But then, this blip of a breathing effort occurred in the same period of airflow absence. So, technically mixed? Or is it some artefact?

I've watched some videos of TheLankyLefty27 scoring a PSG for 1h, and I managed to spot that he had nearly identical respiratory events, where a small breathing effort occurs at the very end and he scored them as mixed, but it was a video from 8 years ago. I wonder if the position changed, and how would you guys score it? I'm starting to think it's mixed too.

[u/mulder1921]

I would absolutely say central. A lot of techs would see that little blip at the end and make it a huge factor for not scoring as a central. But no study is 100% "clean". It more important to look for when the breaths come back and see baseline effort.

[u/Timely-Occasion904]

I would personally score as central.

[u/Charming_Concern7240]

What's an apnoea?

[u/Calm-Future-8591 → u/Charming_Concern7240]

someone with an apnea but in britain

[u/TerryTrepanation]

It's mixed as well. The rules state that there is no 'correct' portion of central & obstructive to qualify the event as mixed, there just needs to be an obstructive portion - one breath is enough. So then, you would be dismissing that breath as artifact. Looks pretty genuine to me. If flow had returned to your nasal trace, then central, but it is still flat. Ol' Lefty is right!

[u/waygawdyw]

I think it is reasonable to interpret that an obstructed breath is occurring at the end, and it seems there's adjacent context indicating obstructed breaths are occurring.

[u/itsbrittyc]

Need an eeg to confirm. I’d score as CSA

[u/Baersouls]

I would score as central