I am looking for an oximeter that logs to a csv,txt or other similar file while I am using it while sleeping. I want to monitor the file with an application that I am building. I do not care if the data is being transferred via bluetooth, USB cable or by some other means. I only prefer that the file is saved to a Windows machine.
There are several oxygen saturation devices for sale on amazon but I cannot tell if any of them log while you use them.
https://www.reddit.com/r/SleepApnea/comments/5ewf82/sleep_and_day_study_oximeter/ cheap but Chinese. ALSO HARD TO WEAR unless sleeping.
I started sleeping with a Contec CMS50F several years ago, it broke and i did not replace it since my SPO2 barely changes during sleep and was ok. Recently i got curious about Perfusion Index with sleep (PI) and purchased this upgraded model from china on ebay (~$120): CMS50I Fingertip Pulse Oximeter,Wrist,Sound,PI,Pulse oxygen saturation,PulseRate …
it generates csv files but so far i have been unable to translate the PI column into percent based data. It allows logging ~4-5 nights of sleep before the memory fills, but i typically offload and charge via USB every morning. You can learn more at: http://www.cpaptalk.com/CPAP-Sleep-Apnea-Forum.html
■With SpO2 value and pulse rate value of storage, the storage data can be uploaded to computers
http://www.contecmed.com/index.php?page=shop.product_details&product_id=187&flypage=flypage.tpl&pop=0&option=com_virtuemart&Itemid=588
Nice form. I have been looking for something like this. Is it FDA certified? How detailed is the pulse waveform record in csv?
I only have one pulse oximeter, a Contec CMS50DA+. (I ordered a CMS50D+, but I think that may no longer be in production.)
My notes:
Contec CMS50DA+ Instructions (needed because manufacturer’s instructions are hard to understand, and because OSCAR doesn’t seem able to directly import CMS50DA+ data)
The SPO2 Assistant (Windows PC) software that comes with it was on a micro-CD with title “2.3.30.01.014”. In addition to installing SpO2, it installs the “CP210X USB to UART Bridge Driver Installer”, which it requires.
It was expensive as oximeters go (about $31), but Sleepyhead/Oscar’s oximeter module (running on my Windows 7 machine) said they could import data from it, which I wanted, so I could line plots of O2 and Pulse underneath the plots of data from my CPAP machine. (Oscar documentation: “OSCAR is currently compatible with Contec CMS50D+, CMS50E, CMS50F and CMS50I serial oximeters. (Note: Direct importing from bluetooth models is probably not possible yet) You may wish to note, other companies, such as Pulox, simply rebadge Contec CMS50’s under new names, such as the Pulox PO-200, PO-300, PO-400. These should also work.It also can read from ChoiceMMed MD300W1 oximeter .dat files.”)
In reality, Oscar could not import the data directly - I had to use SpO2 Assistant to import the file into the PC, after the sleep session was over. I could alternately run SpO2 Assistant while the session is in progress, but then I would have had to connect the USB cable (it looks like a standard micro-USB to Type A USB cable, but I found a remark somewhere that it might be wired different) while I was asleep. but I wonder if any of the cheaper models could connect through the USB cable and transfer data.
It says it can record on-board for 24 hours, though I haven’t tested it for more than about 8 - 10.
It is powered by two AAA batteries - I use rechargeables. Be careful about using devices that require more expensive special size or disposable batteries - the batteries could increase your cost a lot. In addition, for travel (especially weight-limited backpacking), it is obviously beneficial to use as few interchangeable battery types for everything electronic as possible.
Even without that cable, clipping onto your finger is a bit awkward while asleep, and would be very awkward or impossible while doing sports activity. In some respects, a wrist-worn unit would be better - but I haven’t tested them. Also, they might use expensive and/or non-rechargeable batteries.
This was the cheapest listed Contec unit that could import into SleepyHead or OSCAR - but it has no built in time. So you have to record the start time, or make it the same as the CPAP unit. In addition, every time it starts a session, it forgets the previous session - so import before you start a new session. And if you take it off your finger for a few seconds, it turns itself off - so if you put it back on, it starts a new session. And OSCAR can’t import two sessions from the same night.
Here is my procedure for recording data and loading it into OSCAR:
Recording:
Transfering file to PC disk
Additional info: It rounds the O2 saturation levels to integral percentages. I would prefer a finer quantization, because my levels apparently only change a few % points during apnea events. Also, some people say Contec units may be off by a few %.
The ads say it is FCC approved - as I think are other Contec Pulse/Oximeters. I don’t know if that matters to people like me, who are just trying to figuring out how to deal with sleep apnea.
I don’t know the file format. Perhaps you can reverse engineer from the Oscar or SleepyHead Pulse Oximeter module? (EDITED MOD: It also imports a .csv file, whose format is fairly clear.) Anyway, I would suggest you instead pick a unit with a built in clock, and maybe a wrist-worn unit.
Hope that helps.
yeah the built in chargeable battery died pretty fast
By the way, the Contec CMS50F wrist-worn device actually uses a wired connection to a fingertip clamp. So it isn’t what I meant by a wrist unit.
Hi, I’m also in the market for a sleep oximeter for home sleep apnea tests. Anything that can get data to sleepyhead/Oscar, or any other sensible accessible format. It sounds like wrist is more reliable. BT so I don’t have to USB sync would be preferred. Any recommendations?
Thanks for posting, I posted a link to Twitter to see if anybody knows. (I don’t.)
