[OXIMETER] Preliminary results/observations

[withtao]

Just got my Wellue Checkme O2 11/25.  Noticed last night that it ended a session when it reached 18000 entries and started a second one that ended when I took off the Checkme!  I imported the first one in OSCAR (after importing Resmed) and then the second one and seems to have worked.  My Sp02 data is off by a minute, with its time 1 minute earlier than the Resmed even though I started the Resmed first and then the Checkme.  Strange.

I've also exported the Checkme to a .csv file and then opened it with Excel and saved as .xlsx. I'm able to look at the session in detail and then use Excel to summarize the data e.g. average, minimum, maximum, # samples, >= 95, 90-94, <-89, count and % time for 90,89,88,87,86,85. I can see that I have low O2 with no corresponding events in CPAP events!  Since my PCP and DME aren't interested I guess I'm on my own to figure out what's going on.

[withtao]

Just got my Wellue Checkme O2 11/25.  Noticed last night that it ended a session when it reached 18000 entries and started a second one that ended when I took off the Checkme!  I imported the first one in OSCAR (after importing Resmed) and then the second one and seems to have worked.  My Sp02 data is off by a minute, with its time 1 minute earlier than the Resmed even though I started the Resmed first and then the Checkme.  Strange.

I've also exported the Checkme to a .csv file and then opened it with Excel and saved as .xlsx. I'm able to look at the session in detail and then use Excel to summarize the data e.g. average, minimum, maximum, # samples, >= 95, 90-94, <-89, count and % time for 90,89,88,87,86,85. I can see that I have low O2 with no corresponding events in CPAP events!  Since my PCP and DME aren't interested, I guess I'm on my own to figure out what's going on.

I have the Checkme set to buzz when my O2 goes below 86.  I did this so it would record low O2's without buzzing and waking me up, because the first night it was set at below 90 and kept me up.  It went down to 84 and buzzed last night while I was laying there awake!

BTW, I am a shallow breather at night and it doesn't always trigger a Hypopnea event but does lower my O2.

Any insights into low O2 without CPAP events would be helpful.

[Crimson Nape]

Since the other thread you posted in was by another member, I have moved your post here, along with my response.

Congratulations on getting the data to import!  I think the Wellue is limited to a 10-hour session, before it starts a new one.  The 1-minute earlier start is unusual from my experience.  Usually, the Wellue's start time can be up to 1-minute after you initially start the device.  

Some of those SpO₂ drops could be artifacts, caused by bumping the sensor or rapid hand movement.  Go back and see how long they lasted.  Your body is going to average out an oxygen change in both directions.  Because of this, a drop/increase occurs over several recorded inputs.  Also, your data may have duplicate entries to achieve a 2-second recording.  Some of the other Wellue/Viatom oximeter series used a 4-second input.

- Red

[withtao]

Since the other thread you posted in was by another member, I have moved your post here, along with my response.
Thanks. When I posted it on the other thread I thought I'd post I again in case no one saw the other thead.

Congratulations on getting the data to import!  I think the Wellue is limited to a 10-hour session, before it starts a new one.  The 1-minute earlier start is unusual from my experience.  Usually, the Wellue's start time can be up to 1-minute after you initially start the device.  
Looked back and 18000 entries was 10 hours after the start!  What a  coincidence.

Some of those SpO₂ drops could be artifacts, caused by bumping the sensor or rapid hand movement.  Go back and see how long they lasted.  Your body is going to average out an oxygen change in both directions.  Because of this, a drop/increase occurs over several recorded inputs.  Also, your data may have duplicate entries to achieve a 2-second recording.  Some of the other Wellue/Viatom oximeter series used a 4-second input.
When it went below 86 I had been laying still for several minutes and I believe as falling asleep.  It dropped from O2 90 at 02:37:00AM  to O2 84 at 02:37:40AM. Then it started to back up.  So over a course of 40 seconds it dropped 6 points and then went back up to 90 over around 40 seconds after.  Guessing this may be normal for me.  This is new to me.

Thanks so much

[withtao]

Update - Discovered the Windows app O2 Insight Pro for Wellue isn't reliable.  Sometimes it says it can't find the data or is unable to read the data, so I moved to a different USB port and that improved things.  This morning it downloaded the data for 12/2 and 12/1, but wouldn't show them in the app so I couldn't export the data for 12/1 to .csv, but was able to use Android app to upload data from both segments to my Google Drive.

Anyway, able to import the binary data into OSCAR and import the .csv data into Excel.  I merge the two parts into one .xlsx, then use Excel to summarize the night data.

Very happy with improvement and have no idea what I'm doing to get that improvement.  May be subconsciously breathing more deeply so the oximeter doesn't buzz when O2 goes below 87.

Here's last night's data in Excel for O2:

average 94
minimum 88
maximum 98
# samples 18382
>= 95 4870 26.49%
90-94 13491 73.39%
<= 89 21 0.11% 0.70 minutes
90 155 0.84%
89 17 0.09%
88 4 0.02% 0.02% <= 88
87 0 0.00% 0.00% < 88
86 0 0.00%
85 0 0.00%
12/1/2022


First night with no samples below 88 and very few below 90.

Here's 11/30:
average 93
minimum 85
maximum 98
# samples 18464
>= 95 3231 17.50%
90-94 14626 79.21%
<= 89 607 3.29% 20.23 minutes
90 489 2.65%
89 263 1.42%
88 214 1.16% 1.86% <= 88
87 101 0.55% 0.70% < 88
86 22 0.12%
85 7 0.04%
11/30/2022

[Crimson Nape]

If you have increased your CPAP pressure, then that may be the reason your SpO₂ levels are higher.  It is called, Positive end-expiratory pressure (PEEP).  

Here is the link on the subject in the Wiki: http://www.apneaboard.com/wiki/index.php...y_pressure

Here is an additional article on the subject: https://www.ncbi.nlm.nih.gov/books/NBK482178/

- Red

[withtao]

If you have increased your CPAP pressure, then that may be the reason your SpO₂ levels are higher.  It is called, Positive end-expiratory pressure (PEEP).  
I  hadn't changed any CPAP settings!!  That's what is so interesting.  Will continue to load oximeter into OSCAR and see how things go.

Thanks

- Red

[withtao]

Continue to have better O2 without any changes to CPAP settings! I'll take whatever I get.