Pulse Oximeter CMS-50E
I've used this oximiter for about a month now. I give it four stars for being basically outstanding but with some issues. The data is easy to read and the O2 lows correspond, to the second, to apnea events for me. I was really surprised how low O2 sats get when you have multiple events in quick succesion. Very good data for those of us who are data focused.
Compared to the CMS 50D+, the rechargeable batteries alone make this one worth the extra $20 (IMHO). The time stamp is also a very good feature the 50D+ doesn't have.
Compared to the CMS 50H, the only thing the 50E doesn't have is perfusion index. Not worth the extra $20 (IMHO).
Compared to the CMS 50F, you'll have to decide if the watch type base unit and external sensor is worth the extra $50. Note: The CMS 50I wrist base/sensor should be on the market soon. Looks smaller!
1. Small, relatively light weight. It's only fallen off my finger a couple times during the night. Everyone has different fingers, so your experience will likely vary.
2. Screen is easy to read. When is record mode, it turn off in about ten seconds so it doesn't disturb you during the night.
3. The software is good and the .Spo2 files can be downloaded directly into Sleepyhead. Note: If you go to the directory where the .Spo2 files are stored you should also have .csv (comma separated variable) files that can be imported to MS Excel or your favorite statistical program. These have the raw data at a one point per second recording rate.
4. Rechargeable battery. The battery charges via the USB cable and supplied AC adapter. I've never tried pushing it past two nights. Just plug it in in the morning and it's ready to go.
5. Time can be set but must be set each night when you start the RECORD function. The setting does not stay, you have to redo it every night.
1. The USB cord that came with it is not a standard Micro USB cord. I've tried the oximeter with three other standard Micro USB cords I have and I've tried the suppled cord with other USB devices I have and it doesn't work. Maybe that's why the USB connector end is so large. There is some kind of USB/Serial electronics in it? Don't know.
2. The alarm is LOUD! If I set it so I know if it comes off my finger it wakes me up, wakes my wife up, wakes the cats up. No volume adjust that I know of.
3. The documentation is a bad translation. I think most people can figure it out with little trouble. Once you understand the unit, you'll never need the instructions again.
"SpO2" and "SpO2 Review" software
- Paula has already posted an excellent review of the software in the CMS-50D+ review thread.
- Please see the Wiki article "Importing CMS 50D Plus oximeter data into Sleephead." I think we can thank Paula for this as well.