OSCAR: count arousals

[bedeee]

Hi,

(First post - great to be here - big thx to forum admins + OSCAR developers!)

It seems I have the AHI index (as faulty as it is) under control, but I'm still tired, so I'm thinking it could be interesting to count the number of arousals / number of times i more or less wake up?

I'm thinking position data (sleeping on left side, back, right side) and/or accelerometer data can reveal something about arousals.
What else could one measure cheaply?


What is the quick route here, buy a device, and then use "Import ZEO / Dreem / Somnopose / Wellue Data"?
That said, I'm a programmer (in another field!), so I could probably make something work out of a Garmin or iPhone sensor given enough effort (I've seen posts about this).


But I still need advice on what would be best to measure, if the goal is to figure out number of arousals / wake ups.

Thx for any ideas!

/bedeee

[Sleeprider]

Beedee, the Oscar flow chart usually gives us a pretty good idea of where arousals occur, or at least respiratory related arousals. They are usually identified by a spike in flow rate, and especially in a region where flow limitation is occurring. Post a chart and we can take a look.

Since you have programming expertise, if you would like to work with the Oscar development team, I can point you that direction too.

[2SleepBetta]

Bedee, I'm a slow-learner student benefitting from SR's wide knowledge, good explanations, and, specifically, his analyses focused on identification of arousals. I believe others, not I, show helpful capability too, but look at the breadth and depth of SR's experience in his record-breaking number of posts for our benefit.

Given your indicated interests and your and so many others' need (including my wish and need), you might consider developing, along with other AB leader and member talent, a pleth system for AB. A pleth system would measure and record data from chest and abdomen movements in breathing. Along with other EKG signal data those are processed by a sleep lab's devices for visual identification of reportable arousals. 

For an introduction, not that you need one, you might go to Wikipedia's entry that has this opening: "Respiratory inductance plethysmography (RIP) is a method of evaluating pulmonary ventilation by measuring chest and abdominal wall."

Vernier Science Education,    which policy does not allow me to link to, has one such device, along with an accelerometer and other items of interest. Their pleth sells for $119, a crude indicator of possible DIY unit costs. To do anything like lab quality assessment of arousal candidates it takes two belts, but I doubt the Vernier device is suitable for use with either belt. They offer their "pleth: "For educational use alone". It seems to me their device has to record the data, but I saw no way to access or evaluate that.

I see pleth wearers pictured elsewhere on the net. Usually, the two belts pass signals to a compiling or pass-through device that services both belts and may take signal to yet another device. 

I've collected accelerometer and oximeter data from devices that supported downloading. With Excel I converted device data into CSV file format for import into and presentation by Oscar using Somnopose. I may have surviving attachments showing some work product.

My main thread and other postings, interests and concerns have largely been preoccupied by a desire to understand flow limitations and the rem and other sleep destroying arousals from some of them. I certainly would offer any help of which I am capable, including, for AB's and all our benefit a few bucks. I do have a snap-on Polar tensiometer from a failed chest belt of a heart rate monitor I wore in exercise. Its battery powered sender is still sound, but useless without the belt's specially wired, elasticized belt and its chest-traction pads. The tensiometer snapped onto the belt. My hospital's cardo rehab gymn had NuStep and SciFit cardio devices that would pick up my present that Polar device's signals until the belt wore out. I doubt the surviving device's tension and frequency characteristics would be appropriate, but could throw it into the mix immediately with a buck or two.

Some printed matter and Figure 2 in this paper deal with arousals:  https://pmc.ncbi.nlm.nih.gov/articles/PM...-01274.pdf
Also on topic is this for possible review: https://neurolaunch.com/what-causes-arou...ing-sleep/

2SB

[bedeee]

SR and 2SB, thank you very very much!

I'll start slow with the tech and see where it gets me!


Regarding screenshot from OSCAR, I'll post it in the relevant thread when I find my sleep-numbers/patterns have stabilized with my new mask and minimum-pressure!

/bedeee