Data Collection Using GK420E/Silverlining

two · Post by **two** » Sat Mar 11, 2006 1:04 am

Does anyone using the GoodKnight 420E or 418P auto CPAP use the "Data Collection" function in the Silverlining software to record real-time data to their PC? Does anyone know what software can be used to analyze/display the collected real-time data?

I'd like to see more detail regarding the night's events than the standard Silverlining download/display will provide. Some recorded events definitely affect me more than others (based on how I fee the next day, etc.), yet on the "Detailed record" chart each event rates the same tick. It would be nice to get a more complete picture of how severe an event is, how long it lasts, etc.

Any information would be appreciated.

Darth Vader Look · Post by **Darth Vader Look** » Sun Mar 12, 2006 1:44 am

For the amount of people who use this machine on this site, I am kinda surprised that you haven't received a reply to it yet. I was also the person who referred you to this forum thinking you would get a reply.
Sorry for that.

ozij · Post by **ozij** » Sun Mar 12, 2006 2:39 pm

Does anyone using the GoodKnight 420E or 418P auto CPAP use the "Data Collection" function in the Silverlining software to record real-time data to their PC?

That is a very unusual use of the machine, Darth.

This is not the garden variety of recording data and then reading it from the machine's storage to the PC. This is having the machine record the real time data directly on the PC, in a special fromat. When a recording is finished, you'll have an 7 of 8 hour long recording of your sleep (and god knows how much disk space it needs).

I am not surprised there haven't been answers to that question.

O.

Darth Vader Look · Post by **Darth Vader Look** » Sun Mar 12, 2006 11:25 pm

So I am assuming that "two" wants to do something similar to what a sleep study does only using data from the machine itself. I can see where that would be a problem data storage wise. I was sure that that particular software still had time marks on the axis of the graphs so I would wonder what the advantage or point of doing it real time would be?

Guest · Post by **Guest** » Mon Mar 13, 2006 4:13 am

I don't think I will run out of disk space--I'll run a test and see how much space the "Data Collection" uses per hr. It's strange that the Silverlining software has that "Data Collection" function, but then doesn't give you any way to view or use the recorded data--it scrolls across the screen and into the disk file. Frustrating.

The "Detailed record" view of the data downloaded from the 418P or 420E (i.e., not recorded in real time like the "Data Collection" data) can be viewed and is useful, but does not show enough detail. In particular, it uses the same size verticle bar/tick to record each apneac event, with no indication of duration unless the event lasts long enough to produce two ticks. Looking at oximetry data, I know that some of those same-sized "ticks" produce significant desaturations while others do not. I'd like to see more so that I can figure out why.

ozij · Post by **ozij** » Mon Mar 13, 2006 11:43 am

I too find the absolute lack of info about the time spent in Apena frustating. And the details screen is detailed, but not enough.

My guess it that the 420E's real time recording option was meant to make sleep labs use it for diagnostic puproses, with the real-time data analysable by the right software...

According to the manual "you can record the signals in real time on your computer's hard disk for subsequent readback by an anlysis software <snip> the file is recorded in the Silverlining Data subdirectory in a specific format that allows it to be read back only by an analysis software".

O.

becktrev · Post by **becktrev** » Tue Nov 07, 2006 5:51 pm

ozij wrote: I too find the absolute lack of info about the time spent in Apnea frustrating. And the details screen is detailed, but not enough.

I threw this topic in here again a couple of weeks ago and R. G. expressed the opinion, that Knightscan might show the information.
Unfortunately there is very little info anywhere as to that particular software.
I have tried various means to display the graphs without success. (I also sometimes write software)

It seems to me to be a major failing, that no detail as to length of individual apneas is available, when there is already so much unnecessary bumpf in the Silverlining.
I would have thought anyone would be interested in just how efficiently a pressure increase had dealt with an individual apnea and it can only be vaguely estimated by the length of time pressure remains high.

I wrote to both Puritan Bennett and Mallinckrodt (Tyco) France for details how to read the log files - no reaction. Why they bother to refer to it in the manual is a mystery.
Once again, it seems customers are less important than sleep labs.
As we all know.

Data Collection Using GK420E/Silverlining

Data Collection Using GK420E/Silverlining

Data COLLECTION