My son is going on a 2 week backpacking trip this summer, and I have a question about refilling his cartridges while he’s away. Usually, we put just enough insulin in a cartridge to last until the next site change. When we change the site, we get a new cartridge and fill it with fresh insulin.
Is there any reason we can’t fill a cartridge completely - 200 units - and just change the site every few days while he’s on this trip but only change the cartridge when he has used 200 units? He usually uses about 20-25 units/day, but I suspect he’ll use quite a bit less while on this trip. Conceivably, he might be able to get away with only having to fill his cartridge once while away if he starts out with a full cartridge.
Can a single cartridge be used for 2 weeks? Any issues with the insulin itself in being in the cartridge for 2 weeks - crystallizing, degrading, etc.? Daytime temps will be in the 80s or 90s; night temps in the 40s.
Thanks for sharing your experiences.