Acceptable leak

ZZZCPAPZZZ · Post by **ZZZCPAPZZZ** » Wed Jul 18, 2007 3:54 pm

Does anyone know where to find out what is an acceptable leek rate for different masks?

bdp522 · Post by **bdp522** » Wed Jul 18, 2007 4:02 pm

Here are some of the most popular masks;

http://www.internetage.com/cpapinfo/leak-rates-1.html

Brenda

ZZZCPAPZZZ · Post by **ZZZCPAPZZZ** » Wed Jul 18, 2007 4:47 pm

Thanks for the information I appreciate it.

ozij · Post by **ozij** » Wed Jul 18, 2007 9:41 pm

The site (and table) were created and are maintained by dsm, info sent in to him by members of this forum.

O.

John_M · Post by **John_M** » Wed Jul 18, 2007 10:07 pm

bdp522 wrote:Here are some of the most popular masks;

http://www.internetage.com/cpapinfo/leak-rates-1.html

Brenda

Those leak rates are the intentional leak rates.
Leakrates are a sum of the accidental leak rate and the intentional leak rate.

The real question is what is an acceptable accidental leak rate?

I have been trying to get a clear answer to this question for a while and have not been succesful. Folk lore on the board says 40 l/min is an acceptable leakrate. All I know is that I haven't managed to keep my accidental leakrate below about 12 l/min.

But Saint Rosemary, the one with the audobon backpack, has shown that zero accidental leak rates are possible!!!

So guys, what is an acceptable acccidental leak rate?

John M

bdp522 · Post by **bdp522** » Thu Jul 19, 2007 6:34 am

I also get a zero accidental leak rate. My leak graph is a straight line.

Brenda

ZZZCPAPZZZ · Post by **ZZZCPAPZZZ** » Thu Jul 19, 2007 7:27 am

Can anyone tell me if you can make the Encore Pro 1.8 software show only accidental leak?

DreamStalker · Post by **DreamStalker** » Thu Jul 19, 2007 7:45 am

John_M wrote:Those leak rates are the intentional leak rates.
Leakrates are a sum of the accidental leak rate and the intentional leak rate.

The real question is what is an acceptable accidental leak rate?

I have been trying to get a clear answer to this question for a while and have not been succesful. Folk lore on the board says 40 l/min is an acceptable leakrate. All I know is that I haven't managed to keep my accidental leakrate below about 12 l/min.

But Saint Rosemary, the one with the audobon backpack, has shown that zero accidental leak rates are possible!!!

So guys, what is an acceptable acccidental leak rate?

John M

Not sure where or who came up with the terminology of "intentional" and "accidental" leak rates. These terms are imprecise and perhaps that is why there is no info on "accidental" leak rate.

Masks have a designed leak rate and any excess is considered a residual leak rate ... I know I know it is but semantics from one with a science background but what can I say?

In most government work, a residual error within 10% is considered accepatable ... in other words if you take 10 percent of the design value and add it to the design value, that would be acceptable and above would not be acceptable (if it was applicable, less than design value minus 10% of design value would also be unacceptable).

Example:

Let's say at 10 cm pressure the design leak rate is 35 L/m ... at 10 cm anything over 38.5 L/m would be considered unacceptable.

Does this hold true for xPAP leak rates ... I have no idea? Fortunately my residual leak rate is almost always within the 10% margin of error of the designed leak rate and frequently zero% (flat line) so I don't worry about it too much.

John_M · Post by **John_M** » Thu Jul 19, 2007 8:34 am

DreamStalker wrote:
Not sure where or who came up with the terminology of "intentional" and "accidental" leak rates. These terms are imprecise and perhaps that is why there is no info on "accidental" leak rate.

I started using the word "accidental" leak rate for the difference between the "intentional" leak rate and the measured leak rate. I will happily use any other politically correct word to describe this difference.

The real question is how much residual leak rate is tolerable? Do I need to put on an audobon back pack, use Lasinoh, buy padacheeks, buy pursleep etc etc to reduce my current residual rate from 14 liters/min to zero.

Yes, I am still fatigued but my AHI's are less than 2.0 so I am putting my energy into other directions for reducing fatigue.

But maybe I need to take the Rosemary/Brenda course on leak reduction.

So I have two questions...

1/What is the politically correct term to use for the difference between the
measured leak rate and intentional leak rate?

2/ What is an acceptable value for this difference? i.e. What is good enough for government work?

John M

Babette · Post by **Babette** » Thu Jul 19, 2007 2:11 pm

CRAP! Can't read it at work! What's the leak rate on an NAII?

I'm still just reading the LCD screen. Haven't bought a card reader yet. I think my rate is 21 l/m or something like that. I remember 21...

LOL,
B.

John_M · Post by **John_M** » Thu Jul 19, 2007 2:29 pm

Babette wrote:CRAP! Can't read it at work! What's the leak rate on an NAII?

There is a link to a website with Mask Leak rates on Mask Leak Rate page on the Sleep Apnea Wiki

poor Babette wrote:I'm still just reading the LCD screen. Haven't bought a card reader yet. I think my rate is 21 l/m or something like that. I remember 21...

There is a Paitneint Display Error on M-series displays.

John M

Babette · Post by **Babette** » Thu Jul 19, 2007 2:32 pm

Can't read those personal pages at work.
B.

Goofproof · Post by **Goofproof** » Thu Jul 19, 2007 8:02 pm

In Encore Pro, anytime my rate goes past 38 LPM, my numbers go up, That's why a hybrid won't be in my future, way too high for me. I do think the leak rate differs from one machine of the same type to another, also rates differ from one same mask to another, Quality isn't Job One. Jim

DreamStalker · Post by **DreamStalker** » Thu Jul 19, 2007 8:28 pm

Goofproof wrote:In Encore Pro, anytime my rate goes past 38 LPM, my numbers go up, That's why a hybrid won't be in my future, way too high for me. I do think the leak rate differs from one machine of the same type to another, also rates differ from one same mask to another, Quality isn't Job One. Jim

What the hell! If we are talking about Ford standards ... make that 25% above design leak rate

Babette · Post by **Babette** » Thu Jul 19, 2007 10:03 pm

No NAII on the list... Sniffle... I guess I can't play computer geek wonk-speak after all...

LOL,
B.

Mask

Additional Comments: Software is actually 1.8

Mask

Additional Comments: Software is actually 1.8

Mask

Additional Comments: Software is actually 1.8