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Therapy using Lumis 150 ST
#61
RE: Therapy using Lumis 150 ST
(04-19-2022, 11:46 PM)StuartC Wrote: I have a possible theory about the night of the 16th.  In the first period of sleep, I was wearing an Evora Full mask.  In the second period, I was wearing a Vitera.  Rubicon pointed out that low CO2 (over ventilation) mcould contribute to non-spontaneous breathing, so I have been wondering if the Vitera might be more effective at diffusing CO2 than the Evora Full?  

It's not diffusion as CO2 cannot pass through the components.

However there is a difference in the amount of dead space each mask has:

Evora full (large) 164.1 ml.
Vitera full (medium) 271 ml.

Rebreathing CO2 causes depth of respirations to increase.  Increasing dead space of the mask effectively increases your dead space so now your VA is different.

Can you record your changes and specific mask model (VD changes in the size of the mask in some models) in the Oscar notes for each night?  This could be an aha! moment but a lot of Dial Wingin' has been going on and it'll help to find the key with some good data (perhaps even in a spreadsheet--  mask deadspace, VA, RR, spontaneous%, or include those in the notes).

Another capnography and some electrolytes (specifically -HCO3)!!

Meanwhile why not match your "good" night set-up and just sit there for a while.
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#62
RE: Therapy using Lumis 150 ST
I can hear what you're thinking...

"Evora (medium) nasal-- 26 ml. deadspace!!

That'll absolutely do something!!"

I'm sure it would.
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#63
RE: Therapy using Lumis 150 ST
(04-20-2022, 08:16 AM)StuartC Wrote: you're in the wrong time zone.  

I'm also a notorious short-sleeping ASPD. 

I don't know why they call it a "D".

It's just me.

IMO everybody else is a "D".

Depends on your point of view I guess.
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#64
RE: Therapy using Lumis 150 ST
Yeah, it will do something. It will change the resonance frequency of all those oscillating musical notes that you have been looking at!

I have been wearing an Evora small/medium except for the second part of that Saturday night. I was also wearing the Evora for the Learn Targets exercise.

I have been improving the quality of my notes progressively, but have some values that I did not record. Trouble is, of course, they are OSCAR notes, which you do not have. A spreadsheet is a good idea but might take a bit to do.

You are right, if I am going to try to consistently reproduce any night, it may as well be the good one.
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#65
RE: Therapy using Lumis 150 ST
(04-21-2022, 05:38 AM)StuartC Wrote: A spreadsheet is a good idea but might take a bit to do.

No prob!  I'll do it!!

Oh wait!  I'm the best sleeper I know!!  I don't need no spreadsheet!!
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#66
RE: Therapy using Lumis 150 ST
(04-21-2022, 02:08 AM)StuartC Wrote: While I agree that my RR seems to want to be below 13, I don't think it would help to change RR to 12.  That's because my RR really seems to want to be below 12 too.  I that short period just after 3 am, for example, it hovers around 9 to 10.  It is definitely a point to ponder.

So how's the ponderment on this?
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#67
RE: Therapy using Lumis 150 ST
"A single spontaneous triggered breath resets the iBR to its background rate (two-thirds of Target Patient Rate)"
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#68
RE: Therapy using Lumis 150 ST
[Image: sNaO3N5.jpg]
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#69
RE: Therapy using Lumis 150 ST
(04-21-2022, 05:52 AM)Rubicon Wrote: So how's the ponderment on this?

Why 9 or 10 instead of 13 like I have always done before I started stuffing around with iVAPS?  If is is because I am over ventilating, then why did I do better the night before with higher volumes?  And if I am trying to breathe at a RR of 9 or 10, how do I fit in a spontaneous breath to reset iBR when that is triggering the next breath before I can?

I feel like I am chasing round in circles, particularly with iBR.  S or ST mode is looking quite attractive right now until I can get more capnograph information.
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#70
RE: Therapy using Lumis 150 ST
(04-21-2022, 06:06 AM)StuartC Wrote: Why 9 or 10 instead of 13 like I have always done before I started stuffing around with iVAPS?  

Asked and answered.

(04-21-2022, 06:06 AM)StuartC Wrote: If is is because I am over ventilating, then why did I do better the night before with higher volumes? 

NFI.  Sleep is a complicated process.  It's a ****load more than what these kids make it out to be.  More than just "decrease the EPR" or "get an ASV".

You need to be more specific about overventilating.  Post 20:

"with a Minute Ventilation of 7.00 to 8.00 L your pCO2 should be fine."

Or are you referring to making designer waveforms in Oscar?

(04-21-2022, 06:06 AM)StuartC Wrote: And if I am trying to breathe at a RR of 9 or 10, how do I fit in a spontaneous breath to reset iBR when that is triggering the next breath before I can?

Post 12:

"If you want more opportunity for a spontaneous breath to be initiated, change the back up rate."
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