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Red line on the pressure graph
#1
Question 
Red line on the pressure graph
Does any of the more experienced people on this site have any idea has to why there this red line on the pressure graph?

   
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#2
RE: Red line on the pressure graph
Your inhale and exhale pressures are the same (not using EPR), so the values match.
The graph interpreted them a hair differently in that spot.

Thats my guess anyhow.
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#3
RE: Red line on the pressure graph
You have EPR turned off, so the EPAP and IPAP have the same value - except for that brief time when the calculations don't round to exactly the same value - so both the green and red lines show up almost on top of each other.

My browser gave me a magnifying glass for a cursor, so I clicked and both lines showed up clearly Big Grin

I suppose it is arguable whether the pressures were different or the just the settings a bit off.
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.
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#4
RE: Red line on the pressure graph
(09-08-2022, 05:28 PM)pholynyk Wrote: You have EPR turned off, so the EPAP and IPAP have the same value - except for that brief time when the calculations don't round to exactly the same value - so both the green and red lines show up  almost on top of each other.

My browser gave me a magnifying glass for a cursor, so I clicked and both lines showed up clearly Big Grin

I suppose it is arguable whether the pressures were different or the just the settings a bit off.
So, are you saying that there is a ”glitch” or a bug in the OSCAR software?
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#5
RE: Red line on the pressure graph
(09-08-2022, 06:16 PM)Greywolfe Wrote: So, are you saying that there is a ”glitch” or a bug in the OSCAR software?

It's an undocumented feature!
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#6
RE: Red line on the pressure graph
(09-08-2022, 05:28 PM)pholynyk Wrote: You have EPR turned off, so the EPAP and IPAP have the same value - except for that brief time when the calculations don't round to exactly the same value - so both the green and red lines show up  almost on top of each other.

My browser gave me a magnifying glass for a cursor, so I clicked and both lines showed up clearly Big Grin

I suppose it is arguable whether the pressures were different or the just the settings a bit off.

Exactly what do hyou mean by an "undocumented feature?"
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#7
RE: Red line on the pressure graph
That's nerd talk for an unexpected result (i.e. a Bug!).
Crimson Nape
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#8
RE: Red line on the pressure graph
(09-08-2022, 06:29 PM)Crimson Nape Wrote: That's nerd talk for an unexpected result (i.e. a Bug!).

Apparently this needs to be brought to the attention of the OSCAR development team, if this is indeed a bug in the OSCAR software
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#9
RE: Red line on the pressure graph
What you describe is not so much of an OSCAR bug, but an issue with the data and the computer's operating system. The graphs are normally drawn in memory before displaying them, so you don't see this. Each line is drawn separately, and the first line may be overwritten by the second one in certain areas.
Crimson Nape
Apnea Board Moderator
www.ApneaBoard.com
___________________________________
Useful Links -or- When All Else Fails:
The Guide to Understanding OSCAR
OSCAR Chart Organization
Attaching Images and Files on Apnea Board
Apnea Helpful Tips

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#10
RE: Red line on the pressure graph
>>>or the just the settings a bit off.

>>>>or just the settings a bit off.the

This graph is displaying the 'set value' calculated by the machine for the two variables. They are stored as 16 bit values in the SD card files. A difference of one low order bit could be the difference in the two lines.
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.
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