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+--- Thread: Contec RS01 & OSCAR (/Thread-Contec-RS01-OSCAR)
RE: Contec RS01 & OSCAR - gnluna - 01-25-2022
from here:
selfcoacher Wrote:The only thing [the RS01] misses is a movement sensor/accelerometer.
I had considered the Viatom/Wellue options because of this. However, with the RS01, I've noticed that the PPG is sensitive to sensor movement, even with the tape-on "single-use" sensor. I expect it will be possible to process the PPG data with OSCAR and derive "suspected movement" events (at least those movements where the sensor is touched in the process). It may also be quite possible for some to physically modify the RS01 and replace the pressure sensor with a movement sensor.
RE: Contec RS01 & OSCAR - selfcoacher - 01-26-2022
It is not a big deal as it is clear from pleth graph, when there is movement. I have worn both o2ring and RS01 at same time and movements are clearly distinguishable. This is by far the most valuable device on the market at such a cheap price. Once data is importable in Oscar, it will be the clear choice for all members. Their software even has autoscoring and allows for manual and custom scoring. Appreciate your efforts for even trying to create a loader.
RE: Contec RS01 & OSCAR - selfcoacher - 01-26-2022
One other point. Most data provided in Oscar is a derivative of the flow curve. Stuff like respiratory rate, inspiration, exhalation time, all the events snore, hypopnea, apnea, flow limitations, reras. Technically having RS01 flow graph will allow for these features to be extracted from the flow graph. A lot more useful features can be extracted from the pleth graph as well There is a lot of research based on frequency and amplitude analysis. On the heart rate sensor you can have RR derivative stuff like LF, HF and VLHF that is already used for fragmentation and staging. Some of the companies use O2ring as hardware.
RE: Contec RS01 & OSCAR - sawinglogz - 01-26-2022
Note that OSCAR is not currently doing any scoring on the flow data. All flagged events are flagged by the machines, and OSCAR is displayign those flags.
So, yes, eventually we could theoretically score based on flow data, but there's no provision (or even roadmap) for that now. We're focusing on "reporting" rather than analyzing at this point.
RE: Contec RS01 & OSCAR - selfcoacher - 01-26-2022
If memory serves me right, Oscar does import pleth/PPG graph from one of the Contec oximeters? Not sure which model, but I believe that I read it somewhere on the forum.
RE: Contec RS01 & OSCAR - Crimson Nape - 01-26-2022
The CMS-50I model has a Perfusion Index channel, along with the normal pulse and SpO2 channels.
RE: Contec RS01 & OSCAR - selfcoacher - 01-27-2022
[attachment=39339 Wrote:Crimson Nape pid='432464' dateline='1643221611']
The CMS-50I model has a Perfusion Index channel, along with the normal pulse and SpO2 channels.
Thank you, but Perfusion index is different.
[attachment=39339]
It seems OSCAR supports Plethysmogram, so there should be an oximeter that provides Plethysmogram that imports it into OSCAR. Any ideas about which ones?
RE: Contec RS01 & OSCAR - dennislevy - 10-19-2022
I have been using an SP01 and found that sometimes it seems to measure the pulse at half rate. It will change suddenly to half rate and then suddenly change back. Chart example attached. Is this a SP01 problem or a cardiac problem? Any suggestions?
RE: Contec RS01 & OSCAR - gnluna - 10-22-2022
Did you forget the attachment?
Is the change exactly 0.5x & 2x? Did the PPG go wild around that time? What may have happened is the sensor got jostled and the RS01 takes a moment to correct its interpretations.
I recommend you start a new thread for this.
RE: Contec RS01 & OSCAR - dennislevy - 10-23-2022
The RS01 occasionally displays and records 0.5 x the actual pulse rate. I am trying to figure out why. So far I guess that it occurs after blood flow to the finger sensor is restricted by palm pressure or by arm position when sleeping so the reading momentarily disappears with - - - - on the display and then comes back with a reading of half of what it was before the interruption. When the signal from the sensor gets good (low noise) then it flips back to normal. I am guessing that the problem occurs when the signal from the sensor is noisy, which can also happen with some cardiac problems such as atrial fibrillation. I guess that Contec has an unusual digital filter on the pulse rate but the algorithm is never published,