Oximetry Settings

[ac123]

Hi All,

I hope this is the right place to post this. I have a couple of questions about oximetry settings (I just got a Nonin 3150 and attached it to my AirSense 11, and it is successfully recording oximetry and pulse data).

1. As I was making the attached screenshot, I just saw the flag in preferences that says "Oximetry Settings - Not Currently Functional"  What is the nonfunctional item(s)? I see that OSCAR is creating events (no visual flag in the data, but it does show a list of events and times and lets me zoom to them). 

2. Is the pulse change (5 bpm over 8 seconds) a clinically relevant amount? Or if not, is there some other amount that is clinically relevant? I ask because my data shows hundreds of such changes over the night. I'm wondering if it is too sensitive.

3. There are two new indexes (indicies?) in my overview tab - SPO2 drop and "PC" (which I assume is pulse change?). I don't see units for either one of them. What are they signifying? 

From the past oximetry threads, it sounds like not many people have set up the "official" Resmed solution for Airsense 11 (which is the Nonin 3150 BLE). Are there any diagnostic files, etc. that I can submit (maybe once I have a few more nights of data) to help assure everything is working correctly in OSCAR for that? 

Thanks!

[Crimson Nape]

The limits for those 2 parameters are a holdover from the original SleepyHead code.  No one knows how these limits were derived, or else they will not admit to it.     They are on the list of things to track down, and make functional.  
- Red

[ac123]

Understood!

As far as you (or anyone else knows) are there studies or anything else to point to that suggests an alternate threshold?

[Crimson Nape]

Not that I am aware of.  I was trying to mimic the Viatom/Wellue stats from their software and (so far) have not found how they arrive at the numbers they report.  I have tried standard and statistical formulas, both on overall, accumulative, and sliding window data analysis.  Likewise, I finally had to walk away to regain what sanity I have left and return to it another day.

. . . I'm getting into the weeds here.  
- Red