soyjer wrote: ↑Fri Nov 29, 2024 8:09 pm
Common knowledge on this forum, but I just verified by using OSCAR that the AirCurve 10 only internally retains waveform data for the current "day" (12pm yesterday -12pm today), and therefore when my sleep center inserts their SD card to download my data, they are only getting Summary Data (no waveforms). I'm pretty sure that this is true for all Resmed and Philips machines.
This is a bit misleading. First, most sleep doctor's offices will ask you to bring in
your SD card with the data on it rather than bringing in the whole machine so that they can insert
their SD card into it.
One important reason why they do this is that if you insert an SD card into a machine that has already been written to by a different CPAP machine, you are running the risk of getting garbled data. One of the files a CPAP writes on when a
new SD is inserted contains the serial number information for the machine writing the data to that card. Typically the CPAP machine itself will report an "error" if there is data written from a different CPAP machine already present on the SD card and it will refuse to write anything on the card until the card's data is wiped and the card is reformatted. That takes a bit of time---more time than a tech or nurse or PA in a sleep doc's office is going to want to spend watching the dang CPAP machine reformat the card and write its data to the care.
If an SD card is inserted in the machine when you are using it, the detailed flow rate data (along with all the other detailed data) is written directly to the SD card. That data stays on the SD card indefinitely until the SD card is full. This is true for both Resmed and PR machines. So if the SD card is always in the machine, when the data is downloaded from the SD card,
all the detailed data from the SD card is available for downloading. And that's another reason that sleep doctor offices and DMEs would prefer to download the data from the SD card that has been inserted the whole time you've been using the machine.
Now, in Oscar, all that data will show up in the daily reports as soon as you finish the download.
In ResScan, the official software for Resmed machines, (as I recall), the person doing the download can choose whether to download the detailed data or not. It used to be the case where only the last 7 days of detailed data would be downloaded in ResScan. (It's been a long time since I've touched ResScan.)
In Encore, the official software for PR machines, the person doing the download can choose whether to download one night of detailed (flow rate) data or whether to just do a standard download.
If they wanted to, perhaps they could use remote monitoring via cell phone signal to gather the waveform data (?), but I doubt that they do... because if they were doing that then they wouldn't need to insert their SD card into my machine at the beginning of each of my visits to the sleep center.
While Resmed offers doctor's offices and DMEs the ability to use their cloud software instead of ResScan, many doctor's offices and dmes have not switched to using the cloud. In some cases, they may be worried about data privacy and the potential for HIPAA violations should the Resmed servers be hacked. It is not clear whether the detailed flow rate data is uploaded to Resmed's cloud; if it is, there is no mention of that in the documentation of the professional AirView cloud software for Resmed CPAP machines.
So they only really have my AHI and leakage info, which doesn't consider how much time I was actually sleeping and how much of my data is from during ramp time.
They have
usage data---as in how long the machine was run each night. In general, that's the only data that the health insurance companies care about. In the past, that's the only data that Medicare cared about. If the machine is not being used for at least 4 hours on most nights, then Medicare and insurance don't want to pay for the equipment.
Now, it's true, your sleep doc and DME can't tell from the data how much time you were
actually sleeping while the machine was running. The naive assumption is that if the machine is running, you are probably in bed and you are probably trying to get to sleep if you aren't actually asleep.
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