personal, at home sleep apnea test?

[ChicagoGranny]

personal at home sleep apnea test?

As opposed to a public at-home sleep test?

I could sell tickets.

[breathturn]

In the past I used this: https://www.amazon.com/dp/B0C2TR5JTS?ps ... ct_details which I think was decent, but it's hard to know how accurate it is.
Per BigWing's post, I would trust PAP on a very low pressure more.

[BigWing]

Hmm....when you have a PSG in a hospital, they sometimes do some titration. How can they do that when you are not wearing a sealed mask of some sort? It is typically one of those 2-prongs-in-the nostrils tubes.

[robysue1]

Hmm....when you have a PSG in a hospital, they sometimes do some titration. How can they do that when you are not wearing a sealed mask of some sort? It is typically one of those 2-prongs-in-the nostrils tubes.

In a split study, they come in during the middle of the night, take the 2-prong thing off, and put a mask on you. The airflow into/out of your lungs is then measured by the titration xPAP machine.

In a full titration study (that typically follows a full night in-lab PSG without a mask), they put a mask on you at the beginning of the night instead of the 2-prong thing.

In a titration study, the tech running the test controls when to increase the pressure in response to obstructive apneas, hypopneas, and snoring. There's an algorithm for the tech to follow, and pressure is not increased automatically by the machine---the OAs and Hs have to be detected in the airflow AND the EEG data has to show you're asleep AND the belts have to show you are attempting to breathe. For snoring, there's a mic in the room so the tech can hear how loud the snoring is.

The main problem with attempting to use a CPAP running at 4cm of pressure as a proxy in-home alternative to a real sleep test is that some people only need 4 or 5 cm of pressure to prevent enough of their events for the overnight (treated) AHI to be less than 5, and possibly quite a bit less than 5.

[BigWing]

Hi again, robysue1. I wasn't aware of those other options you mentioned, but I was really just speaking from my own experience.

I had the 2-prongs all night at my NHS hospital, yet they claim to have done some CPAP testing (for 11 minutes). Mind you they only used 0.1 mbar - which seems to be just 0.1 cm of water!

I've asked my sleep consultant AND the sleep team how they did that - neither could offer any sort of answer!