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General Discussion on any topic relating to CPAP and/or Sleep Apnea.
fiberfan
 
Posts: 264
Joined: Sat Feb 13, 2010 2:50 pm
Location: UT
Gender: Female

Re: S9 flow skew bug... Anyone else seeing this?

Postby fiberfan on Tue Apr 27, 2010 2:19 pm

I haven't been paying attention to skew for a bit but the skew is now large enough that it shows on my normal look at the data with a 30 minute window.

Todays data had 2 mask sessions

Mask session 1
22 sec start
20 sec end

Mask session 2
25 sec start
45 sec start

I also had a minute of flow data a few minutes after the 2nd mask session with all other graphs empty.

Sounds like it's time to reformat, I will copy files first if anyone is interested in looking at them.

_________________
Mask: Zzz-Mask SG Full Face CPAP Mask with Headgear
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control
Additional Comments: ResScan 3.14 and SleepyHead software.
So many ideas, so much fiber, so little time - http://fiberfan.blogspot.com/

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alterego61
 
Posts: 83
Joined: Wed Aug 26, 2009 10:11 pm
Location: Ontario, Canada
Gender: Male

Re: S9 flow skew bug... Anyone else seeing this?

Postby alterego61 on Wed Apr 28, 2010 7:25 am

Less than a week with a freshly formatted card and a 2 second skew has just appeared for me - flow data begins 2 secs before pressure data.

I have waited no less than 15 minutes each day before taking the SD card out of the s9 to read it, so the theory about removing the card too soon causing the problem is blown!

_________________
Mask: Mirage Liberty™ Full Face CPAP Mask with Nasal Pillows With Headgear
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control
Additional Comments: APAP 5-7, EPR 1, ClimateLine Hose, ClimateControl Auto 27C/80F, ResScan 3.10 / Win7 64, 16GB SanDisk Ultra Class 4 (15MB/s) SD Card

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alterego61
 
Posts: 83
Joined: Wed Aug 26, 2009 10:11 pm
Location: Ontario, Canada
Gender: Male

Re: S9 flow skew bug... Anyone else seeing this?

Postby alterego61 on Wed Apr 28, 2010 8:35 am

I managed to make contact with someone at ResMed who it seems understands the issue.

I was told that the issue is with ResScan, not with the SD card or the S9 and that there is no fix ready yet, but the resolution will likely be a software patch for ResScan.

For myself, I think I will just reformat my SD card every day as a workaround until the problem is solved.

_________________
Mask: Mirage Liberty™ Full Face CPAP Mask with Nasal Pillows With Headgear
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control
Additional Comments: APAP 5-7, EPR 1, ClimateLine Hose, ClimateControl Auto 27C/80F, ResScan 3.10 / Win7 64, 16GB SanDisk Ultra Class 4 (15MB/s) SD Card

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Nord
 
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Gender: Male

Re: S9 flow skew bug... Anyone else seeing this?

Postby Nord on Wed Apr 28, 2010 9:25 am

alterego61 wrote:I managed to make contact with someone at ResMed who it seems understands the issue.

I was told that the issue is with ResScan, not with the SD card or the S9 and that there is no fix ready yet, but the resolution will likely be a software patch for ResScan.

For myself, I think I will just reformat my SD card every day as a workaround until the problem is solved.


That doesn't seem to make sense.... the "timestamps" before it ever gets to ResScan shows the skew in the numbers... correct ???

How do some people NOT have the skew ??? While that would be a great answer...

Was that the Los Angeles office ???

Nord

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alterego61
 
Posts: 83
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Location: Ontario, Canada
Gender: Male

Re: S9 flow skew bug... Anyone else seeing this?

Postby alterego61 on Wed Apr 28, 2010 9:57 am

Nord wrote:That doesn't seem to make sense.... the "timestamps" before it ever gets to ResScan shows the skew in the numbers... correct ???
Nord

The timestamps in the data files are different in the skew files I have looked at and this is why the graphs of them don't line up in the current version of ResScan. If it were patched ResCan could still line up the data in the charts though by adjusting for the different timestamps. I'm not sure whether this would be really solving the issue, or just working around it - as far as I know none of us here know the program logic or why the timestamps are different in the first place. Or, it could be that the person I spoke to doesn't really understand the issue or potential resolution.

What is sure is that ResMed know that some users are experiencing problems. As you know, in North America ResScan is not available for sale to patients due to the regulatory environment so ResMed was understandably quite reticent to give me any detailed information. When I first called my DME they told me to call ResMed, and vice versa - I had to persist to get any kind of response at all.

Nord wrote:How do some people NOT have the skew ??? While that would be a great answer...
Nord

Maybe they have different versions of ResScan, or some other difference in the software environment on their PCs (Operating System, Libraries...). Maybe there are differences in the way they use their machines or maybe some machines just don't have the timestamp issue. As BillB has so tirelessly pointed out we have a very small sample size we're drawing conclusions from :roll:

Nord wrote:Was that the Los Angeles office ???
Nord

Don't know - tech support, American accent so if that is where their US tech support is located, probably.

_________________
Mask: Mirage Liberty™ Full Face CPAP Mask with Nasal Pillows With Headgear
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control
Additional Comments: APAP 5-7, EPR 1, ClimateLine Hose, ClimateControl Auto 27C/80F, ResScan 3.10 / Win7 64, 16GB SanDisk Ultra Class 4 (15MB/s) SD Card

StevenXXXX
 
Posts: 165
Joined: Tue Jan 04, 2011 4:22 pm
Gender: Male

Re: S9 flow skew bug... Anyone else seeing this?

Postby StevenXXXX on Thu Feb 23, 2012 2:22 pm

So, is the "skew" still amongst us?

_________________
Mask: Mirage™ SoftGel Nasal CPAP Mask with Headgear
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control
Additional Comments: ResMed ResScan Software Version 3.16 Do NOT use either Ramp or EPR

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