Hello insulin pumpers and CGM users:
I currently use a Dexcom G5 CGM and a Tandem t:slim X2 pump … although I think that my question is not brand specific.
In my example, assume that my target glucose level is 100 mg/dl, that I have a correction factor of 50 mg/dl/unit, and am currently reading a glucose level of 200 mg/dl.
In that case, if I have a current IOB of 0 units, and enter a glucose level of 200 mg/dl, the pump will calculate a correction bolus of 2.0 units. That seems correct (and logical) if my glucose is steady at 200 mg/dl.
However, if my glucose level is rising significantly at that time, it seems as if the calculated correction dose 2.0 units is too low. Conversely, if glucose level is falling significantly at that time, it seems as if a correction dose of 2.0 units is too much.
While I believe that more automated correction dose calculations in future systems will better compensate for rising or falling glucose levels, I’m curious as to how you calculate a correction dose if glucose levels are rising or falling.
To make this more concrete, how (if at all) would you adjust a correction dose if your glucose level was 200 mg/dl but rising at 1 mg/dl/min? Or if it was the same instantaneous level, but rising at 2 mg/dl/min?
Thank you for your consideration,