Earlier this year, Medtrum updated their S6 CGM system, introducing better sensors and an updated algorithm within the transmitter, with the intention of improving the accuracy, that I had previously reported as not being particularly good.
They were kind enough to send me a pack of the updated sensors and a new transmitter to try out and see if I found any improvements.
After using three of the new sensors with the new transmitter, I’ve arrived at a conclusion, and sadly it’s very brief.
While I get the strong impression that the accuracy has been improved, I have been unable to capture enough data to verify thoroughly, as the life of the sensors definitely hasn’t.
Sadly the above image has been all too familiar and I’ve so far not achieved seven days life from any of the three sensors, let alone the potential 14 that the app promises.
While the initial indications are that the new set up is much more accurate than the old one, indeed, although the next picture isn’t all that clear, post start up, the Medtrum with a calibration was very much in line with fingerprick data, while the G6 using the code based “non-calibration” was a good 1.8mmol/l off, it’s lifespan is, simply put, terrible.
Of the three sensors I’ve tried, the longest life was 5 days, with the following two lasting nearly three days and less than 24 hours respectively. While they’re priced competitively, this simply isn’t good enough.
As a result, I’m not going to publish any kind of accuracy data as I don’t have enough data points for a reliable data set. Suffice to say that while the data has looked okay, none of the sensors have lasted long enough to give a valid test, and that when I raised this with the company, they accepted there are issues there.
So what next? They’re shortly bringing to market a new product, the S7. The data within the A7 combined pump and CGM system’s manual, seems to suggest something very similar to the S6, so we await further details.
Given their current pricing model, I really hope that it remains competitive and that the new product brings both accuracy and longevity. It would be good to see a cost-competitive and accuracy competitive CGM system available to rival some of the existing behemoths in the market.