Remstar Plus M series fine adjustment

[OptimisticChap]

Can anybody explain to me how the "fine pressure adjustment" affects the main CPAP pressure on the Remstar plus M series machine?
It seems to me that the main pressure can be adjusted in ½ pressure increments. Or in other words it jumps from 7.0 to 7.5 to 8.0.
The fine pressure adjustment can be adjusted from -1.9 to 1.9.
I always presumed that having the main pressure at 7.0 and the fine pressure at 1.9 I would have a total pressure of 71.9.
Or with main pressure at 7.5 and the fine pressure at -1.9 I would have a total pressure of 7.31

But I'm getting curious if my thinking is wrong?
Could it perhaps be that having "main pressure at 7.0" and "fine pressure at 1.9" I would have a total pressure of 8.9.

Is there anybody here who really knows?
Would you perhaps know of an official document that would explain this?

[OutaSync]

As far as I know, there is no "fine pressure adjustment" on any of the M series machines. The pressure adjusts in .5 increments. Where do you see anything about a "fine adjustment"?

[nomoore]

As far as I know, there is no "fine pressure adjustment" on any of the M series machines. The pressure adjusts in .5 increments. Where do you see anything about a "fine adjustment"?

Maybe he's talking about the altitude adjustment since the plus model doesn't have auto altitude compensation.

There's no way that it would combine to give a total pressure of 71.9 so I would say yes that the 1.9 should be added to the 7 for a total of 8.9 if it is indeed a fine tuning pressure adjustment. If it's an altitude compensation adjustment you should use the setting to calibrate it using a manometer so that the programmed pressure setting of 7.0 is actually 7.0cm H2O (or let your DME do it).

[Wulfman]

There is a Fine Pressure Adjustment on the M Series Plus machine. I'm not sure how it works, but there's a reference to a using a manometer to verify it......but there's apparently a setting in the clinical setup for fine-tuning the pressure.

The reference and setting options can be seen in the downloadable .pdf here:

http://www.apneaboard.com/REMstar%20Plu ... 0Guide.pdf

EDIT: On second (or third) thought......I think the way it works is that when you check your machine with a manometer and it is "off", you could adjust the pressure one way or the other, up to the tolerances mentioned.....by using the fine tuning setting option.

Den

[nomoore]

There is a Fine Pressure Adjustment on the M Series Plus machine. I'm not sure how it works, but there's a reference to a using a manometer to verify it......but there's apparently a setting in the clinical setup for fine-tuning the pressure.

The reference and setting options can be seen in the downloadable .pdf here:

http://www.apneaboard.com/REMstar%20Plu ... 0Guide.pdf

Den

My guess would be that it fine tunes the altitude setting since there's only three altitude settings to choose from, especially since the provider manual says it is to be used with a manometer. It seems logical to me that you would use one of the three altitude settings as a course adjustment to get in the ballpark and then use the "Fine Pressure Adjustment" to fine tune the pressure using the manometer.

[GumbyCT]

Can anybody explain to me how the "fine pressure adjustment" affects the main CPAP pressure on the Remstar plus M series machine?

Where did you learn or see this reference?

[jules]

Are you referring to some kind of pressure calibration? Most users don't have the tools to do that.

[Wulfman]

Are you referring to some kind of pressure calibration? Most users don't have the tools to do that.

Download the .pdf file I linked to and you can see it.


Den

[jules]

Are you referring to some kind of pressure calibration? Most users don't have the tools to do that.

Download the .pdf file I linked to and you can see it.


Den

k - I know there is an ability on the Everest to do this (in that DO NOT OPEN clinical manual) . I wasn't sure on the Remstars.

Den, is that available on our machines? I looked at the big pdf manual and searched for fine and calibration.

[Wulfman]

Are you referring to some kind of pressure calibration? Most users don't have the tools to do that.

Download the .pdf file I linked to and you can see it.


Den

k - I know there is an ability on the Everest to do this (in that DO NOT OPEN clinical manual) . I wasn't sure on the Remstars.

Den, is that available on our machines? I looked at the big pdf manual and searched for fine and calibration.

No. Since our machines (Autos & Pros) have altitude compensation, it probably takes care of it there. I suspect that it IS fine tuning for the altitude adjustment since barometric pressure could affect the output pressures of the machine.
If there are any pilots reading this, they could confirm whether the altimeter in an airplane has a barometric setting in it......it's been over 25 years since I flew in the company planes where I worked in the early '80's and my memory has gotten a little fuzzy. But, I think the principle is the same when applied to the CPAP machines.

Den

[rested gal]

EDIT: On second (or third) thought......I think the way it works is that when you check your machine with a manometer and it is "off", you could adjust the pressure one way or the other, up to the tolerances mentioned.....by using the fine tuning setting option.

Den

My guess... I think that's all that the "fine pressure adjustment" is for. Just for calibrating, if necessary, when checking the machine's pressure delivery with a manometer.

If a person is tweaking his/her therapy pressure, I don't think the "fine pressure adjustment" should be changed. Not unless a manometer shows that the machine is not actually blowing the pressure shown in the machine's LCD window.

[jules]

All interesting.

I doubt most cpap users have a manometer. I know some do. I have one actually I got to set an old cpap. For anyone interested there are instructions for DIY manometers on the forum but I don't know the links right now.

But the altitude theory is also interesting as I am aware some of the more basic machines do not auto adjust on that and you do need to change that setting when you travel and encounter a major change.

[Wulfman]

And, bear in mind that ONLY "qualified" DMEs should be making these precise machine adjustments......

(because none of the rest of us are supposed to have access to those super-secret menus, anyway)

Den

[rested gal]

Since the M series Plus that Den's link went to already has a setting for manual altitude adjustment in its menu: "Altitude 1 2 3 "

I think that's more reason to believe the "fine pressure" adjustment is there just for calibration adjustment (if needed) of the machine's pressure with a manometer.

True, most cpap users don't have a manometer. But cpap users are not expected to be able to get into the clinical menu in the first place.

Was typing while Den was... will post anyway.

[OptimisticChap]

The post at this link might explain a bit more what I'm up against with my CPAP experience. And the fine pressure adjustment.

viewtopic.php?f=1&t=37560&p=327485#p327485