auto machine and response to apnea's

[sleepie]

does anyone know how long it takes the m series auto to respond to an apnea?---how many seconds does it take the machine to raise pressure ---say 1 point?---and would this change time in apnea?----thanks

[Goofproof]

It depends on how the machine is set up, The pressure 4cm to 20 cm, is the DME's best failure setting, a 4 cm low to high range works best for most people. The machine doesn't change presure for each event, it does it in steps reacting to your needs. Your software dailies will show you the patterns, and from them, you can see why the pressure changes are triggered. Jim

[track]

I have found my machine makes about 3 attempts or jumps and if it fails it drops the pressure way down and starts over.

[Guest]

it seems i still have a few obstru-apneas per night---i was just wondering why if the machine is supposed to stop them by opening the airway---i understand if i don't have it set high enough it can't ---but it seems to me this is not always the case--i would think that the machine would trigger on -a flow limitation or a snore or hypop---to head off the obstructive--so to speak---and if i'm still having a few--maybe the machine is not responding fast enough--just a thought--am i wrong???--thanks

[Goofproof]

The most important thing to deal with, as you are using a nasal interface, are leaks, more important mouthleaks. If the leaks aren't controlled you can't fix anything.

See that your leaks are good, then find the pressure your treatment does the best for you, limit that pressure range so the machine can react to your needs in time to help. Then the numbers will get better. You also have to look at the weeks avg when making changes, chaseing nightly numbers, will make you nuts. Jim

Remember leaks first.

[track]

To echo what has been said....I often see spikes in my leaks before or during apneas...and the spikes don't have to go above the .4 l/s either to make a difference.

[sleepie]

my sleep # is 11---i set mseries to, 11--13.5---leaks are min although not a straight line--- my 7 day average is .8 ahi i know this is good but was just wondering what triggers the machine for a rise in pressure,,and if it moves fast---my average time in apnea is 10-12 seconds--was just wondering why--m series is not getting there fast enough?---pat

[ibthebest]

Also keep in mind how long you are in apnea before your airway is cleared. I average less than 2 per night and most of mine are 5 seconds or less, which is pretty good in my opinion. Compared to no treatment, my sleep study showed I failed to breathe for a total of twenty MINUTES a night.

Mikey

[Wulfman...]

my sleep # is 11---i set mseries to, 11--13.5---leaks are min although not a straight line--- my 7 day average is .8 ahi i know this is good but was just wondering what triggers the machine for a rise in pressure,,and if it moves fast---my average time in apnea is 10-12 seconds--was just wondering why--m series is not getting there fast enough?---pat

The machine increases in 0.5 cm increments.....not 1 cm at a time. It will increase pressure to "events".....leaks, snores, flow limitations, hypopneas and apneas. After each increase, it will monitor to see if the "event" still exists before moving upward or stopping. At some point, if it is satisfied that the event is over, it will go down to its lowest setting.

Actually, this thread has a lot of good information in it about the different manufacturers' Auto machines and their "logic".

viewtopic.php?p=196992

Den

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[sleepie]

thanks for the thred --was very informative--seems like we need to keep the auto range tight so the machine can respond in time to events--thanks for the info-pat

[Goofproof]

thanks for the thred --was very informative--seems like we need to keep the auto range tight so the machine can respond in time to events--thanks for the info-pat

With a AHI under 1 and event time under 15 seconds you are doing very good. If you are sleeping long enough and sound, even better. Jim

[Guest]

i sleep between 7-8 hrs--i feel ok -----but i don't dream or remember them any reason why---not that i dreamed before cpap---but i would like a dream or 2----just to feel normal again----pat

[Wulfman...]

i sleep between 7-8 hrs--i feel ok -----but i don't dream or remember them any reason why---not that i dreamed before cpap---but i would like a dream or 2----just to feel normal again----pat

You could very well be dreaming and not knowing it. The only time we remember our dreams is if we're awakened during them.....or in other than "deep sleep" (3 or 4) or REM stages. It's possible to dream in any stage of sleep.....not just REM.

Den

[sleepie]

i checked my machine and it does move up in increments of 1 before it stops to take a look---it does move up pretty fast to the next point---but i noticed it doe'snt move down fast---it lingers at the pressure that stoped the apnea for quite a long time---pat

[Wulfman]

i checked my machine and it does move up in increments of 1 before it stops to take a look---it does move up pretty fast to the next point---but i noticed it doe'snt move down fast---it lingers at the pressure that stoped the apnea for quite a long time---pat

How can you tell? 0.5 cm increments are reported as the next higher whole pressure numbers. If you set your machine in a fixed pressure of 11.5, in the Details reports, it'll show as 12.0.
All of the Daily Events per Hour (in Auto mode) are reported in whole numbers.

Den