CMS50DPLUS: cheapo-looking but convenient recording pulse-ox

[jnk]

Got it in the mail yesterday. Used it last night. Worked great. It is around $100 at semedicalsupply.com if you don't get the case. Free shipping.

It is an overnight recording fingertip Pulse Oximeter. The "PLUS" means that it records and comes with software and a USB cable that can be used to download the recorded info out of the device in the morning. The software works well on my Home XP computer.

First impression out of the box is that it looks cheap. Hey, it is! But the lightweight plastic makes it comfortable to wear at night, I guess. Most of the weight is the batteries. The great thing is that the entire thing is only a clip that goes on the end of your finger, and it runs on two AAA batteries. No wires of any sort to get tangled up in while it records. Nothing on the wrist. Just a clip for the finger. It's all in there. Amazing.

I used some blue painter's tape to make sure it stayed in place all night. I'll try it later without the tape to see if it stays on without that. If you thrash around a lot at night, you might knock it right off the end of your finger.

At first, semedicalsupply.com sent the wrong one, the CMS-50 D without the PLUS--useless to me, since that version doesn't record. Only the PLUS version does that. When I called semedicalsupply, they immediately sent out the right one and a postage-paid sticker for me to use to send the old one back. Hey, mistakes happen, right?. They corrected it, so I'm happy. Why doesn't the manufacturer give the two products two different names to help prevent those kinds of mixups?

Anyway, if you'd like some O2 data but are a cheapskate like me, you may want to consider it in making your choice:

http://www.semedicalsupply.com/cms-50d_plus.htm
http://www.semedicalsupply.com/CMS50-Dplus%20Manual.pdf

[DoninOrlando]

I am interested after looking at the website but it sounds like the batteries only last 24 hours or roughly 3 days of sleep. Will you be replacing the batteries every few days or did you buy rechargables and a charger ?
Don

[jnk]

I am interested after looking at the website but it sounds like the batteries only last 24 hours or roughly 3 days of sleep. Will you be replacing the batteries every few days or did you buy rechargables and a charger ?
Don

I don't plan on using it every night, although I do have rechargeable AAAs and a charger from Wal-Mart in a drawer somewhere. So that is a good idea. I may do that. I will likely only use the pulse-ox once in a while to check when I make changes to my therapy.

[DreamStalker]

I don't think the batteries are easily replaced although I remember a thread a while back where some Canadian member was able to pry it open to change batteries.

The batteries can be recharged via USB cable but once they finally die, you have to figure out how to open that thing up and then put it back together.

It is not as battery friendly as the SPO oximeter.

[jnk]

I don't think the batteries are easily replaced although I remember a thread a while back where some Canadian member was able to pry it open to change batteries.

The batteries can be recharged via USB cable but once they finally die, you have to figure out how to open that thing up and then put it back together.

It is not as battery friendly as the SPO oximeter.

I think you may have this one confused with some other product, DreamStalker. This one runs on the very common AAA batteries, smaller than AAs. In fact, two batteries are included in the box. I store them outside the device and only insert them for use.

[ozij]

The "SPO Medical" battery friendly? It need three hands and two icepicks to pry out that battery -- although I did manage to use scissors instead. That battery and battery chamber are a nightmare... well, almost.

What's the sampling resolution on CMS-50D Plus, jeff?


O.

[jnk]

The "SPO Medical" battery friendly? It need three hands and two icepicks to pry out that battery -- although I did manage to use scissors instead. That battery and battery chamber are a nightmare... well, almost.

What's the sampling resolution on CMS-50D Plus, jeff?


O.

Good question, O. I don't know. The reporting resolution is given as 1%, of course, but I can't find a sampling rate anywhere and I don't remember what the changes looked like second to second in the reporting software. I can post a report from it later (it's at home on my home computer) if that helps.

Here are the specifications given for SpO2:

Measurement of SpO2

Measuring range: 0%～100％

Accuracy: When the SpO2 measuring range is 70%～100％,the permission of absolute error is ±2％；below 70% unspecified

Resolution
SpO2 : 1%

Measurement Performance in Weak Filling Condition

SpO2 and pulse rate can be shown correctly when pulse-filling ratio is 0.4%. SpO2 error is ±4%

Resistance to surrounding light
The deviation between the value measured in the condition of man-made light or indoor natural light and that of darkroom is less than ±1%.

Average value

Calculate the Average value in every 4 measure value. The deviation between average value and true value does not exceed 1%.

For the data on the screen of the device, for pulse, the manual says:

The update period of data is less than 5 seconds, which is changeable according to different individual pulse rate.

So my guess would be around 4 seconds for recording data, too, but that is only my undeducated guess.

[DreamStalker]

I don't think the batteries are easily replaced although I remember a thread a while back where some Canadian member was able to pry it open to change batteries.

The batteries can be recharged via USB cable but once they finally die, you have to figure out how to open that thing up and then put it back together.

It is not as battery friendly as the SPO oximeter.

I think you may have this one confused with some other product, DreamStalker. This one runs on the very common AAA batteries, smaller than AAs. In fact, two batteries are included in the box. I store them outside the device and only insert them for use.

Yes. I guess I do have a different model ... My bad.

I guess mine is an older E version model. It is very light weight (so no way it has batteries that big) and there is no way for me to get in there for fear of breaking it.

[riveredge1]

I have the one like dreamstalker and love it--i have been using it for about 3 weeks while i patiently wait for soft ware for my new --suppose to be fantastic- machine i was talked into getting from company i ordered from--in the mean time i use the 02 meter while i get use to different settings on PR system--i loke the charts on my computer and print them out each day and put notes on them. I havent heard from or seen sleep doc since my over night -nightmare session and when i do i will be armed with the paperwork--it has shown me how my 02 came from 60% back up to 85-90s and that made me happy--leave it hooked to pc to charge-- $129--i had some questions about software and downloading from meter and when i called company they were mean and rude to me--making me feel like a river rock for inelegance so i wont deal with them again or suggest them--but with someone else they might have a better day--

[jnk]

This may help.

http://www.montfordhouse.com/images/cpa ... manual.pdf

http://www.montfordhouse.com/images/cpa ... manual.pdf

[jnk]

The above are from DreamDiver's amazing review of another product from the company at another thread at viewtopic.php?f=1&t=34394&st=0&sk=t&sd=ar#p293790 , which has screenshots showing the sampling resolution as reported by software.

[jnk]

ozij,

Here is a screenshot of one minute of my data from last night (wake, in this case, and moving, so probably mostly artifact), if this helps give you some idea of the resolution of the data collected and reported.

jeff

[TheDreamer]

In retrospect, I probably should've gotten the CMS50DPLUS, rather than the CMS50F (or perhaps its the CMS60A that I want?)

Anyways...the CMS50F is what I got....and I've only used it twice since I got it....first time I used it was June 3rd....and second time was last night.



The battery won't show full charge anymore.

The Dreamer.

[ozij]

ozij,

Here is a screenshot of one minute of my data from last night (wake, in this case, and moving, so probably mostly artifact), if this helps give you some idea of the resolution of the data collected and reported.

jeff

Thank you for posting that pic, jeff.
No, I can't figure out the sampling rate from that.

[DreamOn]

I have the Contec CMS Model 50-E recording pulse oximeter, and I'm very happy with it. The finger clip is lightweight, has no wires, has oxygen and pulse alarms you can set, comes with software, USB cable and AC adapter. The lithium battery can be recharged via either USB or AC adapter. (It will have to be sent off for lithium battery replacement eventually.) User's manual says the battery will hold charge for 12 continuous hours.

I purchased it at http://www.oximetersonline.com for $119.99 plus shipping. I think there was a discount code at the time too. Right now there's a notice on their web page offering "2009 year end free priority mail shipping." The price at Southeastern Medical supply (http://semedicalsupply.com) is $129.95 with free shipping. The companies are owned by the same people. I got great service.

Here's a comparison chart that shows all the features of the various Contec oximeters, including the CMS-50D+ and CMS-50E: http://www.semedicalsupply.com/SPO2%20C ... 0Chart.pdf. And you can find the oximeter user's manuals here: http://www.semedicalsupply.com/user_manuals.htm.