Replies to This Discussion

Permalink Reply by riccardo on July 13, 2012 at 2:13am

Hi Felix, in case of my 13 year old boy we finally decided to set the pump IoB time as 3 hours. This is to use a very prudential approach. Still we believe that for about 80% of the cases the real IoB time is shorter (about 2 or 2.5 hours at most). What we have noticed is that the action of a single bolus is longer when the basal rate is lower: in a sense, when the basal rate is really well adjusted, and not too low, then the real IoB time doesn't exceed 2 hours.

Of course, this is just our singular experience.

Permalink Reply by Felix on August 1, 2012 at 5:33pm

Hi Riccardo Thanks for message. I brought the IOB down about two weeks ago from 4 to 3 and so far so good. I will watch out for possible shorter IOB when we nail the basal's

Permalink Reply by Cheryl on July 13, 2012 at 7:36am

The leaflet that comes with the insulin that you purchase for the pump will give you detailed information.

Our son uses Novorapid. Action start is 15 minutes, peak 45 to 90 minutes and duration is 3 - 5 hours. All aspects from start to finish will vary from individual to individual and will also vary with blood flow, site absorption, temperature and exercise.

That being said, we use an active insulin setting in our son's pump, in between the 3 - 5 hour suggestion. His pump active insulin time is set at 4 hours.

Permalink Reply by Felix on August 1, 2012 at 5:35pm

Hi Cheryl

Thanks very much for message. I reduced the IOB about three weeks ago to 3 hours and it seems to have helped so far best regards

Permalink Reply by daneenm on July 13, 2012 at 8:46am

We use 3 hours also right now, but I really prefer to use 2.5. We were dealing with a couple of lows so backed off from 2.5 a bit. I truly don't think this setting was causing the lows, but we wanted to remove any factor that might be contributing.

Permalink Reply by Elizabeth on July 13, 2012 at 7:54pm

I use the 4-hour setting for my son's pump (he's on Humalog) and it seems to work for us. There've been a couple times recently that we had site failures happen within 3-4 hours of an insulin dose and we saw no ketones, which is a pretty good sign insulin is working in the body to deliver glucose into the cells, even if it's not clearing all of it out. I think the last one, on Monday, I took a blood ketone reading about 2 hours after setting a site that turned out to be bad, and it was 0.1—he had had his last insulin bolus at ~8:30, and I took the reading at 12:30. His blood sugars were climbing, but we didn't see ketones until afternoon. So I think the 4-hour window is about right for us.

Permalink Reply by EllasMom on July 17, 2012 at 2:05pm

We have ours set at 2 hours. I know, I know...but it works for us. I know, from numerous finger pricks, that I really don't see much of a drop after 2 hours in her BG post correction. I would use the CGM to see how long corrections take during the day AND at night (because it will differ) and then use your son's own body to set the insulin duration based on that. Trial and error, trial and error...but 4 hours seems a wee bit long. Maybe try 3 and see how it goes.

Permalink Reply by MsShelly on July 17, 2012 at 3:10pm

Our sons pump is set on 3.5 hours requested by his endo. I think it is more like 4 because anytime I bolus in less than 4 he tends to fall low. She argues and wants it changed each time we visit.