Oximeter Kit for S9 and USB adapter

[captcam]

Were can I get the Oximeter Kit and adapter for my S9. Also were can I get the USB adapter p/n # 36950 and what is the price for all.

[casadelane]

Check this topic out: viewtopic/t56168/viewtopic.php?f=1&t=50 ... 49#p524249

[linagee]

http://www.cpapaustralia.com.au/shoppin ... 36950.html

(And yes they ship non-machines to the USA. It was $49.95 for the adapter, and $40 for shipping. (I got expedited shipping, waiting a month for international shipping would just be annoying.) The AUD to USD currency conversion rate is about 1:1 at the time I wrote this.)

I can't wait to see what fun I can have with real time data. (If I can make any sense of it, probably not that hard.) Maybe something that wakes me up if there is too many apneas in a period of time?

[jonnybee]

I hope you realize that the adapter is just that, an adapter for connecting the oximeter. The oximeter for the S9 is very expensive, around $450 if I remember correctly. Someone please correct me if I'm wrong.

[linagee]

I agree it is silly to get an oximeter adapter for the S9. It actually seems pretty easy to add in the CMS-50e data to the S9 EDF files if you wanted to. (There's someone on here that had a Python library and specs for the EDF file format. It doesn't seem too complex.) The CMS-50e gives you .csv files for data. (And also .spo2 files, haven't figured those out yet though. It might be the same as the serial stream you get from the oximeter. Learning to read it's serial stream right now. It's like, E2 80 A6 - data - 4E 5F, or something.)

[linagee]

I just had a look into the .spo2 files with a hex editor. Yeah, it actually doesn't look too complicated. Looks like O2 values and heartrate values.

[idamtnboy]

It actually seems pretty easy to add in the CMS-50e data to the S9 EDF files if you wanted to. (There's someone on here that had a Python library and specs for the EDF file format. It doesn't seem too complex.) The CMS-50e gives you .csv files for data.

Won't work. You ever notice how long it takes Resscan to get going when you start it up, and have a card in a reader? What's happening, I'm convinced, is Resscan is reviewing all the files on the card, doing a CRC calculation on them, and comparing the CRC result with the CRC file on the card. If it is not a 100% match the data will not load into Resscan. Change one bit in the EDF file and the CRC numbers won't match, and the data won't load.

What that means there is no way to add data to an EDF file and have it load into Resscan. Well there is one way. If you can figure out what the algorithm is that the S9 uses to calculate the CRC number for an EDF file, you could then generate a CRC file that would make Resscan believe the data is genuinely from an S9. Until you can figure out what that algorithm is you can forget about modifying and EDF file and looking at it with Resscan. It is not one of the 50 or so commonly used and available algorithms for generating a CRC number. I've looked for one already.

If you want to look at the EDF files with EDF Browser, or convert them to text files and look at them with a spreadsheet, then you can change the EDF files. But looking at the data with anything else but Resscan, and seeing it much the same as in Resscan, is an exceedingly daunting task.

[linagee]

Identification.tgt is just put through CRC-32 to get the .crc.
The rest look more like CRC-64. (But I tried both algorithms with no luck.)

Wow, I haven't been thinking this clearly since middle school. Yay for CPAP-brain!

[jbenenson]

Since you have the S9 you do not need the USB adapter to read the SD card. Any card reader that will accept an SD card will work as long as it will plug into your computer. They're cheap and easily available. My PC has a card reader built in, so every day or so I remove the SD card, put it into my machine, and download the data to ResScan. I believe that the USB adapter is used to plug the S9 into a computer which I have never had the need to do.

[linagee]

"CPAP Australia" cancelled my order. They said ResMed doesn't allow them to ship it to me overseas. (Grr, it's only an accessory.)
Here it is in their own words: "The S9 Converter has not yet been developed in Australia, so I wouldn't imagine in the US either. You will have to as Resmed about the reasons for their restrictions. "
Strange how they have something on their order page that hasn't actually been developed yet.
Oh well. Giving up now on this hunt for a few months.
To the previous poster, I realize there is a SD card. The interest in the USB adapter is for instantaneous numbers.

[MikeSharp]

"CPAP Australia" cancelled my order. ... To the previous poster, I realize there is a SD card. The interest in the USB adapter is for instantaneous numbers.

A few months ago I bought a USB adapter from CPAP Australia without any problems. I guess something has changed...

I figured it'd be easier to download the data to my server (yeah, I'm one of those engineer types) auto-magically via USB than to constantly be messing with the flash card.

I haven't experimented with the adapter too much. If I use it to download data into ResScan I can only get summary information. Apparently detailed information is only written to the card and this can't be accessed via the USB adapter? Maybe there is a real time mode I don't know about for doing titration studies?

[linagee]

"CPAP Australia" cancelled my order. ... To the previous poster, I realize there is a SD card. The interest in the USB adapter is for instantaneous numbers.

A few months ago I bought a USB adapter from CPAP Australia without any problems. I guess something has changed...

I figured it'd be easier to download the data to my server (yeah, I'm one of those engineer types) auto-magically via USB than to constantly be messing with the flash card.

I haven't experimented with the adapter too much. If I use it to download data into ResScan I can only get summary information. Apparently detailed information is only written to the card and this can't be accessed via the USB adapter? Maybe there is a real time mode I don't know about for doing titration studies?

Mike,

I was hoping for real time detailed data, but thanks for the info. You may have saved me from hunting down something that doesn't do what I intend it to do.

[idamtnboy]

"CPAP Australia" cancelled my order. ... To the previous poster, I realize there is a SD card. The interest in the USB adapter is for instantaneous numbers.

A few months ago I bought a USB adapter from CPAP Australia without any problems. I guess something has changed...

I figured it'd be easier to download the data to my server (yeah, I'm one of those engineer types) auto-magically via USB than to constantly be messing with the flash card.

I haven't experimented with the adapter too much. If I use it to download data into ResScan I can only get summary information. Apparently detailed information is only written to the card and this can't be accessed via the USB adapter? Maybe there is a real time mode I don't know about for doing titration studies?

Mike,

I was hoping for real time detailed data, but thanks for the info. You may have saved me from hunting down something that doesn't do what I intend it to do.

Yes, he did save you time!

I was going to post an image but don't have time to do it now. The Resmed data management guide for the S9 shows the only data that is available via USB adapter is the summary data; no 30 day detail data, and no 7 day high resolution data. Those are only on the card. O2 numbers are part of the detail data only, not the summary data. A USB adapter will not get you O2 data.

[idamtnboy]

Change one bit in the EDF file and the CRC numbers won't match, and the data won't load.

What that means there is no way to add data to an EDF file and have it load into Resscan. Well there is one way. If you can figure out what the algorithm is that the S9 uses to calculate the CRC number for an EDF file...

There is another way. It works.

viewtopic.php?f=1&t=50970&p=538300&hili ... xe#p538300

If you want to load altered EDF data (such as adding your own SPO2 to the SAD file), into ResScan 3.12, you could copy the patched 3.11 devicescan2.exe into the 3.12 CDI directory, until I get around to futzing with 3.12... which may be a while, as I don't use an S9 anymore so my motivation level is diminished. Or you can figure out how to break the 3.12 copy of devicescan2.exe yourself...

I had forgotten about that thread and suggestion. I haven't tried it myself yet, but maybe I will.

As to reading O2 data in real time the USB adapter won't do it. Only summary data is available via the USB adapter and O2 data is not part of the summary data.

[jzomer]

is there a way to use or convert s9 usb adapter ( no 36950) into an oximeter adapter (no 36940) ?????
did anyone open those adapter to figure out whats inside?
thanks