It seems that many were fired up by my post about how much insulin I was losing with the t:slim verses any other pump I’ve used. One thing I tried to make clear is that the experience was my own, and that not everyone has the same result. There are some out there who are only out 10-20 units per cartridge change. If that’s all you experience in loss, and you’re okay with it, that’s fine by me.
The point of the post was to bring light to my own experience. And, even to make another point, if I were only losing 10-20 units in the cartridge, that’s still too much for me. In my other pumps, I run the insulin all the way until the pump gives me a no-delivery alarm. Then, I’m only losing what’s in the tubing. With the t:slim, you need an average of 10 units more anyway just for that pigtail piece, so essentially, I’m losing 20-30 units more per cartridge than I have to. That’s stilll too much for my liking.
Others made a point that all pumps waste at least 20 units of insulin because the syringe for the t:slim is an actual medical-grade properly-gauged needle. So, as an experiment (suggested by one of the commenters), I drew up 180u in the BD medical-grade syringe and filled one of my Medtronic reservoir with it. There was no difference. The insulin filled it right to the 180u mark on the reservoir.
So that one I’m not really buying. I get that you can see more lines on the BD syringe, so maybe that way you can get a bit more precise, but I don’t think the reservoirs that we use with our pumps are very far off from what a “medical-grade” needle would show. And when I loaded it in the pump? It recognized all but 4 units. And that’s with using what I had filled from the “medical-grade, medically accurate” needle, so yeah, the pumps may also read differently since they detect it electronically, but that goes to also prove my point that I think the t:slim could read the amount of insulin I place in the pump a bit better than it does.
I’m not writing these posts (my honest views and opinions, by the way) to discourage anyone from using the t:slim pump or to not get one if you want one. I just want to make others aware of the issues that I have had with it so that others may be aware of it and to look out for it themselves. The pump itself is an awesome little device. It’s very cool, honestly. I hope to goodness they can fix this along with the other things I’ve mentioned several times throughout my blog, but this one is the biggie that has to be fixed before I use it again. Insulin is precious. I don’t want to waste more than absolutely has to be wasted in order to use a pump.