50 second long central apnea (OSCAR data)

Hi all, some of my CA events are incredibly long.

You can copy and paste the URL (instead of clicking) to reach the image file directly without Imgur getting in the way.
https://i.imgur.com/i8pRIvb.png
https://i.imgur.com/rzIqurg.png
https://i.imgur.com/zQD79LK.png
^Last one is 2 charts merged into 1

If I had woken up and gone to the washroom, I assume the leak rate would instead be spiking for that entire duration right?

Here are some more charts but for obstructive events:
https://i.imgur.com/NLpV62U.png
https://i.imgur.com/uQUwmB4.png
https://i.imgur.com/6bbynIf.png

Also I'm wondering if anyone can tell the difference between a CA and OA based on looking at the graph?
I read that the machine uses some algorithm involving pulses of air... but the graphs look very similar so I'm wondering if there can be any difference in interpretation between ResMed vs Philips for example

My sleep studies are below

2018 Initial
https://www.scribd.com/document/6681411 ... HnpBfYIESF

2018 Titration
https://www.scribd.com/document/6681419 ... dukjDQlcBk

2023 Initial
https://www.scribd.com/document/6681419 ... sjgTF3wzJW

2023 Titration
https://www.scribd.com/document/6681419 ... tXsVRlCvsj

Looks like using CPAP increased my central apneas

P.S I made a previous thread that has less detail / not as specific, not sure how to delete that one
Thanks everyone!

knarf wrote: ↑

Fri Sep 01, 2023 1:25 pm

Also I'm wondering how my machine determines the difference between CA and OA?

----------->

Central sleep apnea (CSA) detection is an advanced technology that uses the forced oscillation technique (FOT) to determine whether a patient’s airway is open during an apnea. When an apnea is detected, small oscillations (1 cm H20 peak-to-peak at 4Hz) are added to the pressure.

If flow is detected, the airway is open and the apnea is from CSA. The algorithm uses the resulting flow and pressure (determined at the mask) to measure whether the airway is open or closed. If no flow is detected, the airway is closed from an obstruction. The device responds by either increasing pressure or maintaining current pressure and recording the event for the patient’s apnea–hypopnea index (AHI) report.

https://www.resmed.com/en-us/healthcare ... echnology/