Report on CMS50E Pulse Oximeter

[Uncle_Bob]

I get USB Device not recognized on my PC when i plug in the USB cable So i troubleshooted and got No device drivers installed for this device
I followed the installation instructions and even tried the whole procedure on two computers but I still get the same result.
I tried the updated software from the link in this thread, same result.
Version 0.9EW

EDIT

I called Southeastern Medical Supply (gave free shipping on over $50 order) and a very helpful guy helped me out. Apparently you have to use the exact grey USB cable that came in the box. I was using a black USB cable that came with my digital camera.

He also mentioned that the Version 0.9EW firmware is the only version that is FDA approved.

[kebsa]

i bought this device from echostore.com and have been very happy with it- the manual was written in poor english but to be honest , it was easy enough to figure out, i only looked at the manual as an after thought because i expected the english to be poorly translated when i saw the device came from china. There probably are more durable units around but given the price i think this was very good value. As for echostore.com- i guess the real measure of a supplier is how they react when things go wrong, my purchase was problem free so i can only comment on the initial purchase which was prompt and well managed

[Mohd]

I've been looking for a descent PO with a fair price . I just found it courtesy of you guys. I've just ordered it form yahoo stores for 279 USD along with the wireless Transmitter/Reciever.


Mohd

[apnez]

http://www.EchoStore.com

Wireless Pulse Oximeter CMS-50E 139.99 USD$
Wireless transmitter and receiver option add 40.00 USD$

Prchased yesterday...

[twokatmew]

My CMS50F pulse oximeter arrived today from Southeastern Medical Supply. Software installed just fine -- it's version 0.982, dated April 2009. The finger probe is awfully fiddly though. On my index and middle fingers I keep getting "finger out" errors even when I'm just sitting there not moving. Finally I moved the probe to my thumb, and although I get occasional "finger out" messages, the signal seems pretty steady. I did a test record and upload, and all's working great. I'll try it tonight and see what happens when I'm sleeping.

Anybody else find any weirdness with the finger probe? I have small hands, but I can get a steady reading using my clip-type pulse oximeter without putting it on my thumb. I'm kind of wondering if I should have gotten the "E" instead. Too late now though....

[ttg]

Anybody else find any weirdness with the finger probe? I have small hands, but I can get a steady reading using my clip-type pulse oximeter without putting it on my thumb. I'm kind of wondering if I should have gotten the "E" instead. Too late now though....

My CMS-50F came in from SE Medical the other day and have had no issues with the finger probe at all. I've tried it on the middle and index fingers of both hands. I would definitely not call my hands small, though!

My guess is that your issue could be due to the small size of your fingers. Perhaps you can wrap something around your finger without blocking the nail area so that it fits more snugly in the probe - just a thought. Good luck!

[joe000]

I just bought a CMS-50F pulse oximeter with the optional wireless adapter.

I installed the software V0.981 on my computer.

When I use the USB cable to connect the CMS-50F to my computer, SpO2 Manager and SpO2 Review both work perfectly.

But when I use the wireless adapter instead, SpO2 Review does not receive data that I upload from the CMS-50F. The program says "Device connected: waiting for data...", but it never receives any data.

SpO2 Manager works perfectly through the wireless adapter.

My computer is a Sony Vaio VGC-V617G with Windows XP Home Edition, Service Pack 3.

Does anybody have any suggestions?

[Uncle_Bob]

I just bought a CMS-50F pulse oximeter with the optional wireless adapter.

I installed the software V0.981 on my computer.

When I use the USB cable to connect the CMS-50F to my computer, SpO2 Manager and SpO2 Review both work perfectly.

But when I use the wireless adapter instead, SpO2 Review does not receive data that I upload from the CMS-50F. The program says "Device connected: waiting for data...", but it never receives any data.

SpO2 Manager works perfectly through the wireless adapter.

My computer is a Sony Vaio VGC-V617G with Windows XP Home Edition, Service Pack 3.

Does anybody have any suggestions?

Are you using the grey USB cable that came with the oximeter? It is different than a standard USB cable which won't work.

[joe000]

Are you using the grey USB cable that came with the oximeter? It is different than a standard USB cable which won't work.

Yes, I've been using the USB cable that came with the oximeter. That's the only way I've been able to upload recorded sessions to the computer. But I should be able to do the uploads wirelessly, and I can't.

[Arizona-Willie]

Hmmm, I have a black USB cable plugged into my CMS - 50F.

I believe it is the same cable I was using on the CMS - 50E ... I'm sure it is.
Don't even remember a grey cable coming with it. Hmmm.

Works just fine though.

I can hook up either unit and it works with no problem.

Sometimes I use the CMS -50E while sitting here if I'm not feeling good to check and see how I'm doing O2 wise.

Wonder if I'm possibly doing something I shouldn't by using that cable. Strange they tell you it won't work and mine is working fine.
Just looked the cable over and there is no markings on it other than standard USB markings. It is plugged into my keyboard cause those ports are handy.

[always_tired]

I am eagerly awaiting my CMS50E from Southeastern. Is there anything tricky that you users have run across that isn't clear in the manual? I understand the manual leaves something to be desired.

Thanks.

[200mph]

...

[rada]

How does the software measure "basal" in "basal SpO2%" on CMS50E oximeter report? I understand that SpO2% means "Saturation peripheral O2 %". This site http://en.wikipedia.org/wiki/SpO2 says: "At low partial pressures of oxygen, most hemoglobin is deoxygenated. At around 90% oxygen saturation increases according to an oxygen-hemoglobin dissociation curve. A pulse oximeter relies on the light absorption characteristics of saturated hemoglobin to give an indication of oxygen saturation. ... SpO2=(HbO2/(HbO2+Hb))."
I understand that basal means (from http://www.dictionary.com): "indicating a standard low level of activity of an organism, as during total rest." I found a definition for basal metabolic rate at http://www.scribd.com/doc/179430/Nutritional-Biochemistry: "The amount of energy required varies by degree of activity and environmental conditions. However the rate of energy production in an individual measured by overall cellular metabolism under standard conditions is more or less constant. This is basal metabolism. Basal metabolism is measured by having someone without food for 12 hours at rest in bed but awake."
So, does the CMS50E software determine basal SpO2 as the SpO2 when we are least active at night, the average over the night, or what?

[-SWS]

How does the software measure "basal" in "basal SpO2%" on CMS50E oximeter report?

Unfortunately I don't know the exact algorithm. I just now performed a brief scan of the Internet and the CMS50E user guide but could not find any specifics.

So, does the CMS50E software determine basal SpO2 as the SpO2 when we are least active at night, the average over the night, or what?

Regarding recording oximetry in general... My assumption has always been that "basal SpO2" refers to:
1) a mean or average of SpO2 during
2) moments without clinically significant desaturation events (with those desaturation events having quantitative criteria---adjustable criteria for the CMS50E I think)

My understanding is that ongoing basal SpO2 can very gradually wander---which is different than a sharp, sudden hypoxemic dip in response to a single apneic event, for instance. And my understanding is that the very general term "basal SpO2" can focus on either: 1) a relatively short window of time---such as the case of a narrow-window SpO2 recent average/mean that can be used as a sliding baseline with which to define desaturation events, or 2) a much longer window of time---such as the case of determining an overall "basal SpO2" for an entire night.

Please bear in mind these are only my assumptions, which might not be quite right. So I hope others will chime in if they have better or more information to share...

[rada]

SWS,
Thank you and Happy Valentine's Day to your family. As I recall you were embarking on a journey some days ago. Might we assume you have returned?
Anyhow, back to the basal pO2, your interpretation sounds plausible to me. In that case, the CMS50E basal pO2 for the period being recorded would be the average pO2 for the night minus the major desaturation events. That would be a useful number for comparing different nights, once one has substracted the comparison of desaturation events -- namely, one would compare two nights by their severe episodes and then also by their basal. I could explore this with my program for measuring the average pO2 over any period of time. I'd have to add code or manually subtract the big desaturation events to complete the test.
Roy