Is there any reason NOT to be on "auto?"

Starlette wrote:What is FOT?

Forced Oscillation Technique - Little bursts of pressure to detect if your airway is open. I sometimes feel them in the morning when I am awake and getting ready to turn the machine off. I believe on the Resmed they will start if no breath is detected for 10 seconds.

Starlette,

Your signature shows that you are using a PR machine instead of a Resmed machine. The FOT technique for detecting CAs on a Resmed is different than the PP (pressure pulse) algorithm that your PR machine uses to detect CAs.

Starlette wrote:What is FOT?

forced oscillation technique and you can't turn it off. So you can't guarantee yourself a just a steady flow of air (on the newer machines) if that is what you want.

Starlette wrote:What is FOT?

Obstructive and central sleep apnea are discriminated in known devices by injecting a 1 cm peak-to-peak 4 Hz oscillation into the treatment pressure waveshape and measuring the resulting 4 Hz flow. The general term for this technique is Forced Oscillation Technique (FOT). The phasic difference in the flow to the pressure waveshape is indicative of the compliance of the load which is then used to deduce if the upper airway is opened or closed.


Source: U.S. patent 8646447 assigned to Resmed
Publication number US8646447 B2
Publication type Grant
Application number US 12/514,696
PCT number PCT/AU2007/001744
Publication date Feb 11, 2014
Filing date Nov 13, 2007
Priority date Nov 13, 2006

avi123 wrote:

Starlette wrote:What is FOT?

Obstructive and central sleep apnea are discriminated in known devices by injecting a 1 cm peak-to-peak 4 Hz oscillation into the treatment pressure waveshape and measuring the resulting 4 Hz flow. The general term for this technique is Forced Oscillation Technique (FOT). The phasic difference in the flow to the pressure waveshape is indicative of the compliance of the load which is then used to deduce if the upper airway is opened or closed.


Source: U.S. patent 8646447 assigned to Resmed
Publication number US8646447 B2
Publication type Grant
Application number US 12/514,696
PCT number PCT/AU2007/001744
Publication date Feb 11, 2014
Filing date Nov 13, 2007
Priority date Nov 13, 2006

palerider should be happy that you cited your source ..

In my opinion we should be able to turn it off or at least have the FOT application shown in our data.

Uncle_Bob wrote:In my opinion we should be able to turn it off or at least have the FOT application shown in our data.

FOT is easy to spot on the ResMed flow rate graphs.
Plus it isn't active all the time...it happens only when the machine needs help in distinguishing between open or closed airway flow reduction. It doesn't necessarily need FOT all the time or with each and every flow reduction.

Same thing regarding Respironics pressure pulses that it uses...they aren't present all the time..only some of the time.

I know some people say they can feel either one and for some people it may bug them and be a deal breaker in terms of using that particular machine. It is what it is though and that's what we get if we use those machines.
Remember...we, the patients, aren't considered the real customers in machine design features. DMEs and doctors are who these manufacturers try to please.

I personally have owned both brands and never felt either the pressure pulses or the FOT in action. I am not sensitive to those changes I guess. Not everyone has a problem with them. I know they have been used because each is easily seen on the flow rate graphs but I personally have never felt them.

Pugsy wrote:
FOT is easy to spot on the ResMed flow rate graphs.
Plus it isn't active all the time...it happens only when the machine needs help in distinguishing between open or closed airway flow reduction. It doesn't necessarily need FOT all the time or with each and every flow reduction.

I know they have been used because each is easily seen on the flow rate graphs but I personally have never felt them.

I am very interested in my flow rate graphs. Do you know if there is a thread showing /explaining how to spot these FOT ?

Grace~~~ wrote:I am very interested in my flow rate graphs. Do you know if there is a thread showing /explaining how to spot these FOT ?

No special thread that I know of. Palerider may have some examples but it's explained in the manual.
page 8
https://sleep.tnet.com/home/files/resme ... -guide.pdf
It's showing 6 seconds of FOT.
To see it on your flow rate graphs you have to zoom way in on each breath and find where there's a flow reduction and then look to see those tiny little humps. They are hard to spot unless you are really zoomed in and they don't show up with all the flow reductions.

Pugsy wrote:

Grace~~~ wrote:I am very interested in my flow rate graphs. Do you know if there is a thread showing /explaining how to spot these FOT ?

No special thread that I know of. Palerider may have some examples but it's explained in the manual.

palerider has stopped seeing Grace~~~'s posts after grace started cheering on fontnutjobtroll..

palerider wrote: palerider has stopped seeing Grace~~~'s posts after grace started cheering on fontnutjobtroll..

He went on my Foe list tonight. Partly because his font nuttiness was giving me a headache and partly because apparently his sole purpose here now is to just call out people and "be the defender of newbies" and not only does he annoy me with the font nuttiness...he now is a shitty, snarky font nut job. Doesn't say anything that I want to waste my time reading especially since it gives me a headache to boot. So he has joined the others on the Foe list.
I do hope people quit quoting him when they decide to spar with him...it's annoying when people do that to me. Maybe they could spar without quoting the entire huge block of garbage he spews out. I can only hope.

I have a special reason for giving Grace more leeway and not dumping her in that basket.

palerider wrote:

Pugsy wrote:

Grace~~~ wrote:I am very interested in my flow rate graphs. Do you know if there is a thread showing /explaining how to spot these FOT ?

No special thread that I know of. Palerider may have some examples but it's explained in the manual.

palerider has stopped seeing Grace~~~'s posts after grace started cheering on fontnutjobtroll..

I can't even be sad about this, Palerider. My posts could be of no value to you.
Certainly not about apnea or cpaptalk.

What would be sad though would be to NOT be able to see Y UR posts.
I continually learn from you and am completely entertained by you.

I hope you will not block me from that?
It is definitely my loss.

Grace~~~ wrote:I hope you will not block me from that?

The Foe list doesn't work that way. We can't block anyone from seeing what we write (even though sometimes there are some people who I wish I could stop them from reading what I write )
All the Foe list does is provide a blocking mechanism so we don't have to read stuff that people write and we don't care to read what those people write.

I use it to keep my blood pressure down..there are some people here whose personality I just clash with and it's best if I don't read what they say and that way I don't get all upset and get into a pissing contest with someone and end up having hurt feelings or throwing up or so mad I can't sleep.

Hi Pugsy ~~~

I wrote you a post thanking you for not dumping me in the basket, but it got lost somehow?

...and then you wrote another and unbelievably I could not recreate what I had just written?
That is so weird? I think it's too much anesthesia? No memory at all? MGosh ...

...though I remember deleting a thought/line about aardvarks and cpap?

~~~anyway ~~~


I am so sorry to think that you EVER were upset enough to throw up from words anyone has said to you.
That actually is making me cry in real life. Which is kinda funny?

Not cry/cry/sob cry ... but tears running down my face.
So ... I guess that is not too much different than throwing up?

Our bodies, minds, and souls are just amazing.

Thank you again and a thousand times over for sharing your mind and soul with the people who read here.
I work at reading your old posts all of the time. I am eternally grateful. You and BlackSpinner are better than the best imaginary friends anyone could make up. GREAT character writers! Better than most real people.


Oh yeah ~~ I remember ... I wrote that while I do not find the 'style' of writing upsetting.
(I even appreciate the effort) I find the thoughts and words about wonderful posters abhorrent.

I was hoping to try to help him focus.
There are many terrible jobs in the world.

...and many people who need help too far gone to actually 'deserve' it.
(but I am probably not saying that right, so it most likely makes NO sense)

Pugsy wrote:I do hope people quit quoting him when they decide to spar with him...it's annoying when people do that to me. Maybe they could spar without quoting the entire huge block of garbage he spews out. I can only hope.

Amen to that, Sister!

Grace~~~ wrote:I am so sorry to think that you EVER were upset enough to throw up from words anyone has said to you.

Don't worry about me. I have developed better ways (I hope) to deal with the stress that sometimes comes with the sometimes negative interaction here on the forum. I have made some personal rules that I am for the most part doing a better job of following and thus avoiding the situations where I ended up making myself ill over what went on here to cause me to be upset.

This forum is far from perfect for sure and we do have some people that just seem to love to stir up trouble but I think the good outweighs the bad. So I just target the good and try real hard to ignore the bad.
My job is to help people with cpap...that's it. That's a big enough job and doesn't leave me with any time or patience to worry about those that just want to bitch, complain, stir up trouble or just be general assholes because they like being assholes.