Session data
I'm using a Philips Respironics APAP. I noticed that the AHI is sometimes much lower when I get up in the middle of the night to use the bathroom than displayed in the morning, so I wanted to look at AHI by session.
I exported session data (OSCAR_drwise_Sessions_2018-11-12_2021-02-27.csv) but don't understand some of the results.
First, session numbering doesn't start at 1 each night.
Second, the AHI column is all zeroes.
Am I misunderstanding the concept of sessions?
RE: Session data
Please follow the instructions in my signature links to Organize Your Oscar Chart, and post a screenshot image of the full night. We will be able to see the sessions and any issues. The chart is much better than a CSV table. Also see Attaching Files and Images.
RE: Session data
I know this is not what you asked, but I see a lot of positional apnea. If you look at the rows H and O, you will see grouped events and that shows positional apnea.
Positional apnea is when you get in a position during sleep where you cut off your own air way. It can happen because you sleep on your back or to high of a pillow. It is caused by chin tucking where the chin goes down to the sternum. It can NOT be helped with any pap machine, you have to get and stay out of the position that caused it,
If it is not as simple as side sleeping or changing a pillow you may need a collar. Please look at the link at the bottom of this post. It will have some charts showing people without collars and the same people with collars. Many people have been helped with the use of a collar.
RE: Session data
Thanks, Stacey. That's very plausible! I'll start by paying attention to staying on my side and keeping the pillow low.
RE: Session data
To get back to your original quest: "How is the AHI graph calculated?"
It is basically a running count of the number of 'events' in the previous 60 minutes. As such, I don't consider it particularly useful, since I can see the clusters in the Event Flags chart at the top, and also see which types of events are occurring.
Apnea Board Monitors are members who help oversee the smooth functioning of the Board. They are also members of the Advisory Committee which helps shape Apnea Board's rules & policies. Membership in the Advisory Members group does not imply medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.