Disaster Night with my new PB 420E

StillAnotherGuest wrote: Kinda makes you realize that having a SAG around the house can be helpful sometimes, don't it?

SAG

Rested Gal wrote:... and another night with a savvy sleep tech manually titrating the pressure.

Yup.

O.

plr66 wrote:Just crawled around to the back of my box for the third time and now see that in fact there is no 9-point serial port at all! Wonder why, since this computer is an XP that I think is only about 3 years old. Grr.

Because serial ports are obsolete. You'll either have to get a serial port card or a serial-to-USB adapter. Or see if they starting making a USB Silverling cable.

SAG

echo wrote:what can cause a FL to NOT be 'pressure sensitive' ?

A "fixed" (rigid) obstruction, like tiny nasal passages. -SWS had a great thread on this that started on TAS with mountainwoman but it's over here somewhere, too.

echo wrote:Is this the 'shallow breathing'?

No.

echo wrote:is that reflected in the cycle states somehow?

Which one, FLs or shallow breathing?

echo wrote:Also I'm confused what you mean by:

StillAnotherGuest wrote:However, the conclusion was made at some point that somewhere between "some" and "most" of the FLs were NOT pressure sensitive, based on the "pegging".

Do you mean that the 420E decided that the FLs were not pressure sensitive because they were hitting the maximum defined pressure? No that cannot be what you mean, so who was making that conclusion and where is the pegging seen?

RG made that decision. "Pegging" is where the delivered pressure hits the maximum allowable set pressure. It's another of those words I made up. In RG's downloads above, it's wherever pressure (rapidly) rose to maximum.

echo wrote:Another question: Where on that graph from RG do we see the breathing pattern? Is that the PTAF line?

Yes.

echo wrote:Is that measured from the 420E or from an external PSG sensor?

An external pressure sensor hooked into the 420E, hereafter referred to as "The Rock".

echo wrote:I see three trends on that graph: the left third, where there are arousals, the breathing peaks are smaller, and the chest activity is less (is this the shallow breathing/FLs?). The middle third where the breathing peaks are larger, the chest activity is more, and there are less? arousals. Then the right third is similar to the first third. Am I interpreting that correctly?

Pretty much. Normal flow waves have a rounded appearance, FLs are flat on the top (although there are a bunch of subtypes). So, it starts out in the middle of a flattening event, gets progressively worse, effort increases, especially in the chest, there's some snores, then a breakthru event, an arousal (which makes this a RERA)(the arousal is just a tiny EEG burst there), the waveforms get a little more sharp (but not great), then we're off again. And "The Rock" just sits there, like a.....like a....

OK, the metaphor will come to me in a minute.

SAG

BTW,

StillAnotherGuest wrote:That was 0530 on 10/19, if you're curious.

I mean the 10/19 study.

StillAnotherGuest wrote:

plr66 wrote:Just crawled around to the back of my box for the third time and now see that in fact there is no 9-point serial port at all! Wonder why, since this computer is an XP that I think is only about 3 years old. Grr.

Because serial ports are obsolete. You'll either have to get a serial port card or a serial-to-USB adapter. Or see if they starting making a USB Silverling cable.
SAG

Shows how computer savvy I am, eh?!
Thanks, SAG and everyone for a very interesting and educational thread. I still have not made friends with this machine as it seems to be a bit more trouble than my Remstar, but will continue to use it till it becomes more comfortable for travel. As a relatively small negative detail, I do not care for the hose with the pressure tube inside, as it is heavier, stiffer, and kinks up in use, where a standard hose does not.

So back to the beginning. Are there advance predictors for when, or rather who, would need to have IFL turned off?

plr66 wrote: Are there advance predictors for when, or rather who, would need to have IFL turned off?

Oooh, is this like a "Family Feud" question?

My answer is "faulty nasal valves".

SAG