[GiorgioG]

Our 7 year old lays on top of his pump regularly when he sleeps and despite it making the entire pump way hotter than 80 degrees, it’s never caused any efficacy issues. He’s played soccer for 3+ hours in the 95+ degree heat (4 days in a row), no problems with the insulin on board.

[bigtunacan]

From the context of your message, I think I correctly understood you to mean you have had no problems with the insulin that is in the insulin pump's infusion set reservoir?

Trying to help and I don't want to come off as rude, so please forgive me in advance. The term "insulin on board" has a very specific meaning and it refers to the fast acting insulin that is currently in one's body and still active.

So let us say you are using fast-acting insulin, like Humalog, and it stays active in your body for 2.5 hours.

You take 3 units of insulin at Noon

1 hour later you take another 3 units of insulin

1 hour later you take another 4 units of insulin

At 2:00 you have 10 units of insulin on board

At 2:30 you have 7 units of insulin on board

At 4:30 you no longer have any insulin on board

[GiorgioG]

You're right - I'm sorry, I shouldn't have been so careless with my words. What I meant was, we've never had a problem with the insulin in his pump's cartridge/reservoir even in 90+ degree heat for 3+ hours with him running and sweating.