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Oximetry Chart guidance
#11
RE: Oximetry Chart guidance
(06-11-2018, 07:49 PM)ShaunBlake Wrote:
(06-11-2018, 12:46 PM)Sheepish Wrote: ... O2 (how do I get this forum to let me paste in a subscript 2?) ...

Here's  a superscript, which is the preferable (proper) way to abbreviate oxygen: O²
(The acceptable alternative is O2; O₂ is not correct.

Thinking-about Let us go forth and consult the all-knowing Oracle of Wikipedia: https://en.wikipedia.org/wiki/Oxygen
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#12
RE: Oximetry Chart guidance
I am not sure what the rules are for my Contec oximeter and sleepyhead to classify an O2 drop. But mine seems to classify a lot of drops, even though I remain at steady 93% during the time. Several days ago, sleepyhead shows O2 drops of 3620, 1130, 1316 seconds. My O2 shows steady at 93-94%. So why would it say I had a drop for that amount of time? Is it because the baseline used was 98%, and anything under that is a drop? How does it calculate the baseline?

Anyway, I will get O2 drops for no apparent reason some nights, except for some weird breathing patterns that go along with it. Sometimes a short (5 sec) apnea will cause O2 to drop to 85%. Other times, I have a (20+ sec) OA/CA/HA that does nothing to O2. I wish I could get mine steady and stay there at 90+ all night, so I didn't have to wear this damn O2 sensor.
ResMed AirCurve 10 vAuto
Pressure EPAP min 4.4, IPAP 8.4, IPAP Max 18, PS 4.

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#13
RE: Oximetry Chart guidance
(06-11-2018, 08:46 PM)Sheepish Wrote:
(06-11-2018, 07:49 PM)ShaunBlake Wrote:
(06-11-2018, 12:46 PM)Sheepish Wrote: ... O2 (how do I get this forum to let me paste in a subscript 2?) ...

Here's  a superscript, which is the preferable (proper) way to abbreviate oxygen: O²
(The acceptable alternative is O2; O₂ is not correct.

Thinking-about Let us go forth and consult the all-knowing Oracle of Wikipedia: https://en.wikipedia.org/wiki/Oxygen
<gasp> Are you trying to tell me you think the phlogiston theory is wrong?   Oh-jeez

No?  O₂ is the correct form?  Oh, c'mon, that's what I was taught in elementary school, and "everybody knows" how wrong most of that teaching is!

Oh, okay, I agree, and admit that my mind has flown the coop.  Andk thank you Sheepish for your gentle correction.  (I'll get you, you mumble mumble...)
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#14
RE: Oximetry Chart guidance
   

Myron, the parameters for my Contec are shown near the bottom of my june 10 report.
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#15
RE: Oximetry Chart guidance
(06-11-2018, 11:01 AM)trance Wrote: When I imported last night's data into SH, I ended up with 100+ hours and 1000+ events. I've only used the Oximeter a few hours total. Too-funny  

(06-11-2018, 11:10 PM)MyronH Wrote: I am not sure what the rules are for my Contec oximeter and sleepyhead to classify an O2 drop. But mine seems to classify a lot of drops, even though I remain at steady 93% during the time. Several days ago, sleepyhead shows O2 drops of 3620, 1130, 1316 seconds. My O2 shows steady at 93-94%. So why would it say I had a drop for that amount of time? Is it because the baseline used was 98%, and anything under that is a drop? How does it calculate the baseline?

I've used the Contec CMS50F for only two nights, and for last night I get:
101 Events reported by SpO2 Assistant  (defined as a drop of 4% or more for a minimum of 10 seconds)
249 Events reported by Sleepyhead (defined as ... what??)

@trance, my session durations are correct in SpO2 Assistant, but stretched out by an extra hour or more in Sleepyhead.

I wanted to try importing the file from SpO2 to see if it would at least not stretch the graph, but Sleepyhead says "No oximetry module could parse the given file".
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#16
RE: Oximetry Chart guidance
Merry Christmas! I figured this out:

Quote:Me:
I've used the Contec CMS50F for only two nights, and for last night I get:

101 Events reported by SpO2 Assistant  (defined as a drop of 4% or more for a minimum of 10 seconds)
249 Events reported by Sleepyhead (defined as ... what??)
In SpO2 Assistant you can change the analysis parameters. It's set at 4% drop, you can change that to 3% if you want. In the Oximetry Report, you're given the amount of time spent at less than 88% blood oxygen. You can change that to 89%. That's what my sleep doc wanted to see, because that's an insurance parameter.
-- Julie picante
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