I am experiencing the return of an old problem that caused me to have to take an extended/unwanted pump vacation several years ago. The problem of scars/fat deposits/lumps... I am careful to change my site every 48 - 36 hours; rotate site locations; prep skin properly...
I started to think that the bolus delivery rate was a big part of the problem even though I keep my pump delivery set to "slow".The only thing that seems to help is to use the pump to calculate the insulin that I need. I write that number down and then make little hatch marks to count off as I manually enter the bolus in smaller portions (0.25 u every 30 seconds or so), until I get the amount I want. Sometimes I will use a syringe to give the up front bolus as well.
I have tried most everything - like using combo bolus over 0.1 hrs ( I get an initial amount of 30 - 35% up front and then another ~3rd of the bolus at minute 3 and the remainder of the bolus at minute 6). For this to work, I might have to do more than one 0.1 hr combo bolus for a meal in order to keep the volume small.
This really seems to decrease the lump formation, but it is tedious and hard to manage at times - and requires a lot more focus in order to be safe in calculations.
I have learned that the T-slim delivers more slowly and that an extended/combo bolus is delivered continuously rather than every 3 min.
Would like to know if anyone has ideas had similar experiences, info or suggestions.
Appreciate any thought you might be able to offer -