420E setting question

LarryJ · Post by **LarryJ** » Mon Mar 14, 2005 2:24 pm

On the 420E what is the flow limitation (FL) setting for? I believe this will help with a problem I'm having. I am new to apap (just switched from cpap)and set the range for 6-20, but what's happening is I awake in the morning or sometimes at night and the pressure is up around 15, now since im awake and have no blockage in my thoat shouldn't the presure back down? It stays at the high pressure even though I'm awake and breathing normal. My FL setting is 1. Also can someone explain this feature to me since it says nothing in either the patient or clinical manual as well as nothing on their website.

Thanx for any info,
Larry

LarryJ · Post by **LarryJ** » Mon Mar 14, 2005 5:28 pm

anyone?, anyone?, Beuller??

chrisp · Post by **chrisp** » Mon Mar 14, 2005 5:31 pm

SWS has the best explanation of this feature. Might try doing a search of his posts.

Sorry , thats the best I can do.

I FOUND IT. http://cpaptalk.com/viewtopic.php?p=836 ... ight=#8364

Read down a bit to SWS 2nd post.
Cheers,

Chris

wading thru the muck! · Post by **wading thru the muck!** » Mon Mar 14, 2005 5:38 pm

LarryJ

Here is a link to a long thread of which much of it was on this topic.

As far the IFL1 and IFL2 settings, you can "experiment" with turning them off and seeing if this helps. Becareful to monitor whether on not making these changes affects your AHI.

Read the thread first.

viewtopic.php?t=817&postdays=0&postorder=asc&start=0

Janelle · Post by **Janelle** » Mon Mar 14, 2005 7:20 pm

This is what is called "Runaway Pressure". It's fairly common if you are a shallow breather. Easily fixed by resetting the 1FL to 0. (See those other links above). The Remstar Auto also does this, I think, from what I've read. Not a big deal.

LarryJ · Post by **LarryJ** » Mon Mar 14, 2005 7:47 pm

Chris Wading and Janelle,

Thank you very much for the info! It helped me greatly to better understand my apnea. My shallow breathing is where I think my problem was.

thanx again,
Larry

gailzee · Post by **gailzee** » Mon Mar 14, 2005 9:17 pm

Larry:
I have more hypop's than ap's anyway. But now that I've grown more accustom to the 420E, (6 wks) and the swift nasal pillow, my pressure is set at 5-14. I'm averaging around an 8-10. I do have the SILVERLINING software, and a few very smart people on this board can help you set it up, so you can monitor it yourself. CPAP.com sells it. I bought it, now I think I"m a whiz at checking my numbers daily, my pops/ap's have dropped to less than 10 or less on an average night, so I can see for myself how I'm doing.

My 420E sometimes runs up, so I turn it off (and then back on). if in doubt the best technology (off switch) But my pressure doesn't stay up, take the hose off your mask, let it drop and then it'll go up to it's starting low number.
Seems to work ok after that.
Also, when I take the hose off to get up during the night, sometimes, not all the time, pressure creeps up. Guess it's just one of those things.

Hope this helps...........

LarryJ wrote:Chris Wading and Janelle,

Thank you very much for the info! It helped me greatly to better understand my apnea. My shallow breathing is where I think my problem was.

thanx again,
Larry

-SWS · Post by **-SWS** » Tue Mar 15, 2005 7:29 am

Janelle wrote:This is what is called "Runaway Pressure". It's fairly common if you are a shallow breather. Easily fixed by resetting the 1FL to 0. (See those other links above). The Remstar Auto also does this, I think, from what I've read. Not a big deal.

I'm not so sure we can attribute this problem to predominately "shallow breathing"----or that we can even safely say how common/uncommon 420e "runaway pressure" is if one happens to experience "shallow breathing" (whatever constitutes "shallow breathing" by either clinical or colloquial definition).

All AutoPAP brands have been reported on the message boards to experience "runanway pressure" by only a few users. Flow limitations seem to be one common anecdotal culprit for at least the 420e and Spirit. Not sure what the culprits were in the Remstar Auto's case.

Turning off IFL1 from within the Silver Lining Three software has been the workaround for at least a handful of 420e users. I believe those 420e users were all able to keep IFL2 on. If anybody turns IFL off from the 420e LCD control panel, I think they are turning both IFL1 and IFL2 off. However, I'm not certain about this last statement, and will have to check to see if that is true.

Janelle, I'm heading off to the Beagle breeding boards right now to suggest that we should acquire sire Beagles with three testicles to increase our chances of champion offspring by 50%...! J/K

wading thru the muck! · Post by **wading thru the muck!** » Tue Mar 15, 2005 7:38 am

[quote=-SWS]Janelle, I'm heading off to the Beagle breeding boards right now to suggest that we should acquire sire Beagles with three testicles to increase our chances of champion offspring by 50%...! Wink J/K[/quote]

-SWS,

I've got a male Jack Russel with two dewclaws on each front paw. What will that increase his chances of? Maybe I can teach him to count to 12 instead of 10

-SWS · Post by **-SWS** » Tue Mar 15, 2005 7:44 am

Wader wrote:I've got a male Jack Russel with two dewclaws on each front paw. What will that increase his chances of? Maybe I can teach him to count to 12 instead of 10

LOL!

I believe that Jack Russel Terrier will find twice as much dew when he runs the fields in the morning, Wader.

Removing the dew claws from our pets is thus a great way for hoseheads to control rainout... Glad you brought that up!

UKnowWhatInSeattle · Post by **UKnowWhatInSeattle** » Tue Mar 15, 2005 11:14 am

... as we scamper off topic like a beagle following his nose to find anything remotely edible...

I'm one of the handful of 420E users that (taking -SWS's suggestion) turned IFL1 off after having a runaway on my 2nd night. I have IFL1 off and IFL2 on, and turned my lower limit up from 4 to 6. I haven't seen anything like the runaway since. I only budge off of 4 a few times a night, usually in response to snores or hypops.

LarryJ · Post by **LarryJ** » Tue Mar 15, 2005 12:25 pm

I slept with FL1 off last night for the first time and had no runaway pressures and I also seem to have also slept alot better, I'm feeling very "energized" today.

-SWS · Post by **-SWS** » Tue Mar 15, 2005 12:35 pm

LarryJ wrote:I slept with FL1 off last night for the first time and had no runaway pressures and I also seem to have also slept alot better, I'm feeling very "energized" today.

LarryJ, that's really good news. How did your overall AHI look? I know UKnowWhatInSeattle planned a follow-up trip to his pulmonologist/sleep-doc to discuss his results. Please be sure to get your therapy results in to your health care professional as well.

The inherent risk is in not understanding our data, thinking that we are escaping "runaway pressure", only to set the machine up to "under trigger". I think it's important to keep our doctors in the loop at all times.

LarryJ · Post by **LarryJ** » Tue Mar 15, 2005 1:40 pm

-SWS wrote:
LarryJ wrote:I slept with FL1 off last night for the first time and had no runaway pressures and I also seem to have also slept alot better, I'm feeling very "energized" today.
LarryJ, that's really good news. How did your overall AHI look? I know UKnowWhatInSeattle planned a follow-up trip to his pulmonologist/sleep-doc to discuss his results. Please be sure to get your therapy results in to your health care professional as well.

The inherent risk is in not understanding our data, thinking that we are escaping "runaway pressure", only to set the machine up to "under trigger". I think it's important to keep our doctors in the loop at all times.

My sofware should be arriving today.

UKnowWhatInSeattle · Post by **UKnowWhatInSeattle** » Tue Mar 15, 2005 3:09 pm

-SWS,
I haven't been back in to see the sleep doc yet ( )...

However, I have been seeing much lower "run" counts than I was. I'm typically in the range of 18-51 for the last two weeks instead of the 150+ I was seeing at first.

Here is what my detected events look like for the period 2/12 - 3/10:
Apneas: 6 (0.0 Index/h)
Apneas/CA: 7 (0.0/h)
Hypops: 49 (0.2/h)
Hypop/FL: 13 (0.1/h)
AV (snores): 168 (0.8/h)
FL - Runs: 1929 (9.6/h)

So, I think I'm doing pretty danged well.

420E setting question

420E setting question

thank you

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