If you go to the Tandem diabetes website, you can download the new t:slim X2 “User guide (with Control-IQ Technology)”. Having some free time today, I’ve been going over the details.
I think this will be the information most relevant to people, hopefully you can zoom the images:
Things I find interesting:
I know a lot of people are worried about the 180 upper limit, but the pump is not designed to keep you there, it only delivers automatic boluses if you are predicted to exceed 180 in the next 30 minutes. You can still set your target blood sugar under personal pump profiles to a lower setting, though I imagine this only matters in the manual bolus calculator.
The normal working target is 112-160. Some may find this too high still. Personally, I think I’d be happy to float in the middle of that if I never exceeded 160, but I haven’t been able to yet eliminate those high numbers on my own.
There is a sleep setting, which can be started manually and/or pre-programmed with a lower/narrower target range of 112-120. Supposedly this is because there are fewer outside variables when you’re sleeping. However, no automatic correction boluses are delivered in this mode. (No sleep walking/eating!). Perhaps those with lower target ranges could live in this mode if they’re not worried about post-prandial spikes?
There is an activity mode with a higher target range of 140-160. Scheduled sleep mode will not engage when your in activity mode, and will have to be manually started.
It is different than Basal-IQ in that it can vary your basal up or down, and not just suspend it. It can also automatically bolus up to 60% of your max bolus, which is determined by a multitude of settings as well your pump history. Extended boluses will resume when insulin resumes (basal-iq currently cancels them, and many have taken to using high temporary basals instead of extended boluses). Conversely, you can no longer set a temporary basal rate if Control-IQ is engaged. You have to disable Control-IQ if you really want a temp rate.
The two things I find most odd is that it requires you to enter your weight and total daily insulin dose during configuration. These are used to calculate the safety variables, so I understand the necessity, but I feel like it’s a FDA-forced redundancy based on outdated diabetes theory to be basing anything off that information. I’m not even sure what to use as my total daily dose, given that can vary by 100 units depending on body chemistry and food choices any given day. Do the current loop algorythyms ask for this?
I don’t think the active population on this forum is representative of the greater diabetes population. I can fully see how this system would be disappointing to those who are already achieving great control. I know I’ve felt “diabetes shamed” by the <6ers here in the past because I’ve personally always struggled for control. I wish you could customize the target ranges, but I just don’t see the FDA allowing that right now. Definitely not in it’s first iteration. I’ve been able to float between 80-100 with just Basal-IQ, but still spike after meals. I’ve only been on basal-iq for about a month, though, and am still learning.
Maybe I could achieve better on my own. Overall, I think it’ll be a world of improvement to those who are struggling, though. I still haven’t decided if I want to install yet. I think I want to wait and see some dexcom data from others before I do, it wait until it’s backwards compatible back to Basal-IQ