Long active insulin times?

My pump is the 670g and my active insulin time (AIT) is 5 hours and 30 minutes. Does anyone else have such a long AIT? When I started on this pump at the beginning of this year, my educator started me on the standard AIT. But my endocrinologist and I have found over time that my insulin does remain active for that long. That is, my BGs continue to go down absent any other factors that would cause a decrease. That happens regularly for me.

With such a long AIT, I’ve been wondering of that would affect any pump settings and checks. For example, since the insulin lasts that long for me, does that mean that my “max delivery time” check should actually be done over a longer period of time, since it may take longer for a bolus to take effect?


Hi Jack @stansbuj, I have not used the 670-G so I’m truly familiar with the algorithm. You can check if it properly adjusts for your set AIT with a piece of paper, a pencil and grade school arithmetic.
I use a t-Slim x2 and its algorithm does properly take into consideration my IOB when I have the duration set beyond the default setting.