TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
dps4fx
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TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by dps4fx » Tue Jan 20, 2026 10:14 pm

Thank you for the group existing, i'm one to always read, but very rarely post. But i'm stuck.

Sleep study (Home) almost a year ago - AHI of 55.9 - (See attachment) - minimal centrals.

Got a machine Set to CPAP - pressure of 7. OA went to Zero. but TECSA was an issue. CAs between 5 and 10. Went to Sleep Dr, said would go away. But didn't. Had EPR on 1, but was during ramp only. EPR off for ages now due to articles re centrals.

Did a lot of reading, and bought the V-Comm. Centrals decreased significantly. But didn't feel better.

So ordered an O2 Ring (played with the pressure to compensate the V-Comm), and see to get the best results with a pressure of 9.6. ie, self titrated.

But throughout all of the above - the CSR I was getting got worse with the V-Comm, even thought the AHI went down. (look at the stats page), last 30 days CSR - 3.45%, but last year 2.38%. Got the O2 ring and was playing with the pressures for last month ish.

My Dr sent me for a brain CT and Heart Echo. No significant problems there.

I really thought I got the settings right (9.6) - looking at the O2 Ring. Multiple days great then two bad ones. (see attachment)


My Sleep Dr keeps saying do a sleep study, but I am concerned about it being on a good day - not the one in a week bad day. Hence why I am asking for your help.

Leaks control have always been pretty good.
The AHI seems to creep up in the early morning.

This post isn't allowing me to upload more than three attachments, so will try to respond with showing a good day with CSR and O2 effects.

My question is please, is the CSR something else? any advice with TECSA and V-Comm, settings changes etc. anything else to try?
Attachments
Sleep Study Results.jpg
Sleep Study Results.jpg (436.15 KiB) Viewed 2056 times
O2 Scores.png
O2 Scores.png (256.54 KiB) Viewed 2056 times
CPAP Stats.jpg
CPAP Stats.jpg (814.93 KiB) Viewed 2056 times
Last edited by dps4fx on Thu Jan 22, 2026 3:45 am, edited 1 time in total.

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 3:17 am

Load the entire file into SleepHQ and post the link. Note when V-Com is in use.

What specifically were you expecting V-Com to do and what were your criteria for making changes?

dps4fx
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Location: Australia

Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by dps4fx » Thu Jan 22, 2026 3:47 am

Hi, I don't have Sleep HQ, but here are the Oscar screen shots. (just needed to be approved to post more attachments) The V-comm was purchased to reduce the Centrals - and it does, but I don't know what the CSR is? Don't have heart failure.

I ignored the AHI on the Resmed 11, and looked at the O2 results each day. Until under 10% was between 90-94% below 90 was only under a minute each night (total). But when I have CSR (or periodic breathing) I feel like a zombie when I wake up. even with a 1.11 AHI as shown in this Good day example)
Attachments
Good Day with CSR 2.jpg
Good Day with CSR 2.jpg (894.41 KiB) Viewed 1962 times
Good Day with CSR (zoomed in) 2.jpg
Good Day with CSR (zoomed in) 2.jpg (833.85 KiB) Viewed 1962 times
O2 duing CSR.jpg
O2 duing CSR.jpg (540.89 KiB) Viewed 1963 times

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 4:35 am

dps4fx wrote:
Thu Jan 22, 2026 3:47 am
I don't have Sleep HQ
Now you do:

https://www.sleephq.com/

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 4:51 am

dps4fx wrote:
Thu Jan 22, 2026 3:47 am
The V-comm was purchased to reduce the Centrals - and it does...
Who said it does that?

Anyway, previously you said
the CSR I was getting got worse with the V-Comm
so I have bafflement.

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 4:54 am

dps.jpg
dps.jpg (147.44 KiB) Viewed 1951 times


Does look like TECSA (see trigger, along with a little preexisting instability) but @45 seconds those cycles are on the long side.

dps4fx
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by dps4fx » Thu Jan 22, 2026 6:10 am

To clarify the questions.

Vcom claims it reduces Tecsa. And it does. The AHI averages I got went from 7-8 a night of centrals to 2-3.

I am not considering the CSR as centrals, that is where our terminology is differing. As the resmed does flag them as such.

So vcom - ahi (centrals reduced) but csr increased.

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 3:55 pm

dps4fx wrote:
Thu Jan 22, 2026 6:10 am
I am not considering the CSR as centrals, that is where our terminology is differing.
Well, we're gonna have an issue then, because by definition, you need central apneas or hypopneas or it isn't CSR.

Da Rules 2007, didn't get the new book:
csr.jpg
csr.jpg (32.18 KiB) Viewed 1896 times

dps4fx
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by dps4fx » Thu Jan 22, 2026 4:18 pm

Sorry, if during the CSR it flags an apnea if counting it as the machine does. But was not counting the rest of the csr as central unless it shows a central flag.

Are you saying that I have severe centrals as csr is a type of central?

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 4:35 pm

dps4fx wrote:
Thu Jan 22, 2026 4:18 pm
Are you saying that ...
We're gonna get along a lot better if you NEVER say
dps4fx wrote:
Thu Jan 22, 2026 4:18 pm
Are you saying that ...
What I said, I said.

If it's not there, I didn't say it.

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 4:47 pm

However, in re:
dps4fx wrote:
Thu Jan 22, 2026 4:18 pm
...I have severe centrals ...
"Severe" is generally used to describe an index >30. ResMed needs to call the above pattern something so they call it CSR even though it could be periodic breathing, Cheyne-Stokes, high-altitude PB, TECSA, idiopathic and God knows what else.

So if you total up all your centrals (counted and uncounted) and divide by hours of therapy you'll be able to classify it as mild, moderate or severe.

Meanwhile, there's another lie ResMed is laying on you. It doesn't know if you're asleep. So next you have to go through all those events and subtract the ones where you're awake. Frankly, I have a feeling a lot of stuff you're (ResMed, but you believe them) calling central apneas is actually nothing.

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Thu Jan 22, 2026 4:54 pm

So consider this:

If you have TECSA (which you probably do) and it's all it a very neat package that ResMed calls CSR (which it probably does) your AHI is 0.0 and could never qualify for a modality like ASV because you are simultaneously normal and severe.

dps4fx
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by dps4fx » Thu Jan 22, 2026 6:21 pm

Thank you for your input.

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Nocibur
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Re: TECSA Centrals, then V-Com, then O2 Ring, then add CSR to the top

Post by Nocibur » Fri Jan 23, 2026 3:10 am

Nocibur wrote:
Thu Jan 22, 2026 4:54 pm
...your AHI is 0.0 and could never qualify for a modality like ASV because you are simultaneously normal and severe.
So now you're probably thinking "Hey wait minute! Didn't I just post a screenshot that showed some CAs? So in that case, it can't be zero, right?"

Well, a closer look will reveal more ResMed lies:
csr2.jpg
csr2.jpg (94.69 KiB) Viewed 1741 times
RM indicates a bunch of those as Obstructive. IMO, anybody in their right mind would realize they're central, but it is what it is.

So if this is your worst night, and we get rid of those few isolated centrals at the beginning (they're probably post-arousal) you end up with 45 centrals in a ~9.5-hour period for a CAI of 4.74 (Whoops! Just missed qualifying!). What fails to get consideration is that first CSR block, some unscored events in the second and third block, and some centrals in the 3rd block undoubtedly, and erroneously, scored as obstructive.