The Physics of CPAP - Questions

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
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jnk...
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Re: The Physics of CPAP - Questions

Post by jnk... » Tue Jun 18, 2019 11:53 am

jimbud wrote:
Tue Jun 18, 2019 11:15 am
jnk... wrote:
Tue Jun 18, 2019 9:59 am

Your well-thought-out statements.
Huh? Where did you see an example of that?

Nice to see you posting. Always a pleasure.
JPB
Thanks. Here are some examples of thinking things through in Gryphon's statements in that post:
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
I'll take any constructive criticism
Many have trouble accepting criticism. So I appreciated the comment.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
you wouldn't want to oversimplify the situation and blame all apnea and sleep disordered breathing on the tongue.
That happens a lot on boards, it seems to me.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
the CPAP is simply there to act as a “Splint or support” of the airway. The CPAP doesn’t play much of a role in the breathing process it’s simply there to support that process.
This addresses a common misconception and can't be repeated enough, IMO.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
pulses you feel from a modern CPAP now and then is that the PAP is trying to tell what has caused the air movement to stop.
It's good for people to know that who think ResMed machines are trying to force open the airway with those tiny airway-status pulses.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
The CPAP machine simply acts like a splint… think of buttresses of wood in an old mine shaft, holding the ceiling up so it doesn’t collapse on top of the miners.
Nice way of illustrating it in a simple way.
Last edited by jnk... on Tue Jun 18, 2019 12:04 pm, edited 1 time in total.
-Jeff (AS10/P30i)

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Re: The Physics of CPAP - Questions

Post by jnk... » Tue Jun 18, 2019 12:00 pm

zonker wrote:
Tue Jun 18, 2019 11:44 am
jnk... wrote:
Tue Jun 18, 2019 11:00 am
zonker wrote:
Tue Jun 18, 2019 10:16 am
Gryphon wrote:
Tue Jun 18, 2019 9:39 am

Besides, we know cpap works and is way less difficult then mastering a musical instrument.

Restwell,

Gryphon
i'm playing my cpap as a musical instrument right now.
I prefer the the telepapper over the stratopapper, myself. But either one can play good music if set up well.
can i use the wah-wah pedal with either one?
All I know about Wawa I learned from Gilda Radner in the 70s.

https://www.youtube.com/watch?v=zcns3A-IHMQ
-Jeff (AS10/P30i)

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jimbud
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Re: The Physics of CPAP - Questions

Post by jimbud » Tue Jun 18, 2019 12:06 pm

jnk... wrote:
Tue Jun 18, 2019 11:53 am
jimbud wrote:
Tue Jun 18, 2019 11:15 am
jnk... wrote:
Tue Jun 18, 2019 9:59 am

Your well-thought-out statements.
Huh? Where did you see an example of that?

Nice to see you posting. Always a pleasure.
JPB
Thanks. Here are some examples of thinking things through in Gryphon's statements in that post:
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
I'll take any constructive criticism
Many have trouble accepting criticism. So I appreciated the comment.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
you wouldn't want to oversimplify the situation and blame all apnea and sleep disordered breathing on the tongue.
That happens a lot on boards, it seems to me.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
the CPAP is simply there to act as a “Splint or support” of the airway. The CPAP doesn’t play much of a role in the breathing process it’s simply there to support that process.
This addresses a common misconception and can't be repeated enough, IMO.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
pulses you feel from a modern CPAP now and then is that the PAP is trying to tell what has caused the air movement to stop.
It's good for people to know that who think the machine is trying to force open the airway with pulses.
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
The CPAP machine simply acts like a splint… think of buttresses of wood in an old mine shaft, holding the ceiling up so it doesn’t collapse on top of the miners.
Nice way of illustrating it in a simple way.
You are right. I was wrong. :oops:
I was thinking OP.
Gryphon is one sharp cookie.
Many apologies to him if I offended. Most likely did.
Again my bad.
JPB

I would blame it on lack of sleep, but I think it is a more serious condition. I'm not quite sharp enough at times. It comes on without warning. No cure.
JPB

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Re: The Physics of CPAP - Questions

Post by jnk... » Tue Jun 18, 2019 12:34 pm

jimbud wrote:
Tue Jun 18, 2019 12:06 pm
my bad.
Gryphon doesn't seem like the thin-skin sort.

I make those kinds of mistakes in the forum format all the time, confusing OP with responders. It happens. People get it.

I thought you were just lobbing a softball up for me to hit. It gave me an opportunity to be specific. Thanks for that.
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Jack Burton
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Re: The Physics of CPAP - Questions

Post by Jack Burton » Tue Jun 18, 2019 1:19 pm

camper wrote:
Sat Jun 08, 2019 10:44 pm
I wish to understand...
that is where I searched for "tl;dr".

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Re: The Physics of CPAP - Questions

Post by palerider » Tue Jun 18, 2019 2:43 pm

Jack Burton wrote:
Tue Jun 18, 2019 1:19 pm
camper wrote:
Sat Jun 08, 2019 10:44 pm
I wish to understand...
that is where I searched for "tl;dr".
Hah! Good luck!

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Re: The Physics of CPAP - Questions

Post by jimbud » Tue Jun 18, 2019 3:07 pm

jnk... wrote:
Tue Jun 18, 2019 12:34 pm
jimbud wrote:
Tue Jun 18, 2019 12:06 pm
my bad.
Gryphon doesn't seem like the thin-skin sort.

I make those kinds of mistakes in the forum format all the time, confusing OP with responders. It happens. People get it.

I thought you were just lobbing a softball up for me to hit. It gave me an opportunity to be specific. Thanks for that.
You are too kind. Seriously.

I have wondered. None of my business, but would you happen to be the son of a minister (preacher man) ?
I have known a few in years past. You remind me of them. In a good way of course. :wink:
JPB

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jnk...
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Re: The Physics of CPAP - Questions

Post by jnk... » Tue Jun 18, 2019 3:44 pm

One of my nicknames in grade school was Preacher Boy. I didn't mind it. :lol:

I am very religious myself but have no trouble at all being as helpful as possible to atheists or anyone else with their PAP therapy. And I personally do not consider this forum to be a platform for me for anything other than sleep and breathing topics and occasional OT nonsense.

Thank you for the kind words, sir.
-Jeff (AS10/P30i)

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Re: The Physics of CPAP - Questions

Post by jimbud » Tue Jun 18, 2019 4:04 pm

jnk... wrote:
Tue Jun 18, 2019 3:44 pm
One of my nicknames in grade school was Preacher Boy. I didn't mind it. :lol:

I am very religious myself but have no trouble at all being as helpful as possible to atheists or anyone else with their PAP therapy. And I personally do not consider this forum to be a platform for me for anything other than sleep and breathing topics and occasional OT nonsense.

Thank you for the kind words, sir.
Thank you for your answer. I see you as a good man and just wondered. Figured I wasn't going to find out if I did not ask.
I grew up in the Nazarene Church, but guess it didn't take very well. Organized religion it not my cup of tea.
I very much believe in God. He has been very good to me. My problems have all been of my own making.
I will shut up now.

JPB

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Gryphon
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Re: The Physics of CPAP - Questions

Post by Gryphon » Wed Jun 19, 2019 10:10 am

jnk... wrote:
Tue Jun 18, 2019 9:59 am
Gryphon wrote:
Tue Jun 11, 2019 2:43 pm
Anyone feel free to weigh in on whatever I write if I'm wrong. I'll take any constructive criticism and file it away, so I can learn from it. . . . movement of the muscles in the act of breathing . . . asleep. I’m thinking the same movements and muscles come into play, it would stand to reason that the only significant difference is we’re not deliberately controlling these muscles when we’re sleeping, just like we don’t during day to day activities when we’re not thinking about breathing rather letting the body do what it knows how to do naturally.
Only because you asked, and I wouldn't exactly call it "wrong," but respiratory-muscle behavior, particularly for those muscles used for breathing other than the diaphragm, does change a bit during sleep, as I understand it.
Diaphragmatic function is largely preserved, which is essential for the maintenance of adequate ventilation during sleep. However, accessory muscle function is reduced, particularly during REM sleep . . . -- https://www.ncbi.nlm.nih.gov/pubmed/12814041
Normally I wouldn't mention it, since that side point has no real impact on the logic or overall thrust of your well-thought-out statements.
I appreciate your follow up on what I was talking about, sleep vs awake breathing mechanics. I feel I probably oversimplified when I made it seam as though awake breathing done automatically with out thought was the same as asleep breathing.

I was trying to get the OP to stop over complicating things with the CPAP and his "Physics thought process" It seams like he's thinking that when you fall asleep suddenly everything about your breathing changes fundamentally and that a simple CPAP machine is somehow responsible for way more then it is. I get the feeling that he still is giving the CPAP machine credit for the volume changes that occur inside the lungs by way of the diaphragm. It's like he thinks that when you fall asleep if you have sleep apnea the machine is doing all the work... I meant more as you said - that awake or asleep our diaphragms are what moves the air "In and Out" the CPAP just keeps the channel open so the water can flow back and forth.







As for everything else. It's all good. I assumed whether right or wrong that asking for an example of well-thought-out statements was maybe directed at the original OP and not me. ( I tend to ramble a lot, and my writing style isn't the best, it was never something I was any good at in school )

I was quite happy to see JNK post a follow up in defense of me and what I said.

I know we had a difference of opinion about using recording oximetry due to our own experiences... I've been on a "EVERY ONE" should use a recording oximeter at least once every 15 years or so... Campaign. Mostly because of my own experiences with horrible desats my Apnea presented with. I also knew that a negative result didn't prove sleep apnea wasn't present. Sleep health is so much more complicated then a simple blood ox test.

It was helpful to find out that some Insurance companies "Who should know this too" were using false results on recording oximetry to screw their members out of any follow up sleep treatment to save money. I should have known this... I can't say I'm surprised... but I'll remember that going forward. I still feel recording oximetry could be useful... but not if the results for good or bad are manipulated to deny people followup treatment they deserve. I so wish we could just gather data and not have it used incorrectly to save money at the cost of people's lives... Thanks for sharing your experiences with me. I hope there were no hard feelings, I wanted to say more before, but just didn't know how to put what I was thinking in to words.


Also I was thrilled to see "Gryphon is one sharp cookie" No worries, any possible offence, erased by the Sharp cookie comment. :)

As for my skin... Meh. It's as thick as it needs to be I guess. For me it's not the skin, it's the way you let stuff fall on you. Like water off a ducks back is how I try to live. Dealt with enough bullying and mean spirited people growing up. I generally don't take offence unless someone is trying to attack me, even then... it's all about the situation and intent. Online forums are not a place that is going to "wind me up" one way or the other, for the most part.

I feel very safe here. :)

I try to be rather analytical about the way I think or explain things. I know I sometimes write way too much, when a simpler statement could have had more impact. I sometimes worry that I write so much that people skim or skip my postings, that they're too arduous to wade through. I have been working on my writing style, trying to re-read and edit better before hitting that submit button. I know I've "Ended" quite a few threads... At least in my mind. Were I posted a silly long post and then... No follow up posts and the thread is now dead. "Maybe I'm just that good? meh... prolly not"

I always try to let people know that they can comment on what I say and that I welcome feedback if I feel there is any chance I'm delving into something I'm not 100% sure about, even then I don't mind being told I'm wrong if you show me why.

It's not like this is a photography forum or some site, were we talk about inane things that are important but ultimately not so much. If I write something about photography or a technique I like to use, and it's misunderstood or someone thinks it's wrong it's not that important. Worse case, they get frustrated if they screw up and don't get the results they wanted.

But.... If I say something that's misunderstood or wrong here, it could hurt someone's health. I know I'm never going to have all the answers, there's always a chance I could be wrong and I try to take what people tell me and absorb it so that when I offer advice away from this forum were I don't have a backup team, I'm more educated and better able to give good, sound advice that is going to help and not hurt anyone. I may still slip up or forget something someone told me before... so keep the comments coming, I just like having the chance to help other people.

PS: If anyone wants to help me with my writing or grammar that's ok too.... Just be nice, please? LOL

Thanks again for everything!

Restwell,

Gryphon

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Re: The Physics of CPAP - Questions

Post by palerider » Wed Jun 19, 2019 2:14 pm

Gryphon wrote:
Wed Jun 19, 2019 10:10 am
I appreciate your follow up on what I was talking about, sleep vs awake breathing mechanics. I feel I probably oversimplified when I made it seam as though awake breathing done automatically with out thought was the same as asleep breathing.
Well, awake breathing is very irregular, but nobody notices because it just happens without thinking about it.
Gryphon wrote:
Wed Jun 19, 2019 10:10 am
when you fall asleep suddenly everything about your breathing changes fundamentally
Well, it *does* change fundamentally, different systems handle breathing when awake a and when asleep... You can usually get a pretty good idea whether someone is awake or asleep by looking at the breath shapes...

The "sleep-wake-junk" we refer to is usually "transition apnea" which happens as the body switches from one breathing system to the other.

You're entirely right that the diaphragm is still doing all the work of moving air with CPAP, just like when awake.

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Re: The Physics of CPAP - Questions

Post by jnk... » Wed Jun 19, 2019 4:24 pm

I wouldn't use the word "all."
Our major muscles of ventilation are the muscles that make up the diaphragm. During non-REM sleep, the lesser muscles of ventilation (accessory muscles) which are located in the chest and abdomen become more involved in assisting the diaphragm. During REM sleep, the contribution of the accessory muscles is diminished. -- Sleep Disordered Breathing - Rotech.
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Re: The Physics of CPAP - Questions

Post by palerider » Wed Jun 19, 2019 10:56 pm

jnk... wrote:
Wed Jun 19, 2019 4:24 pm
I wouldn't use the word "all."
Our major muscles of ventilation are the muscles that make up the diaphragm. During non-REM sleep, the lesser muscles of ventilation (accessory muscles) which are located in the chest and abdomen become more involved in assisting the diaphragm. During REM sleep, the contribution of the accessory muscles is diminished. -- Sleep Disordered Breathing - Rotech.
Quite, that was just a simplification to indicate that it's not the CPAP doing your breathing for you.

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