Adventures in teen looping: expectations vs reality

November is diabetes awareness month. I blogged every day in November in past years. I don’t have it in me to do it this year but it’s a good reasons to at least write something here and there.

So, looping… For those who don’t know, looping is a DIY system created by a few genius T1 peeps and parents, that allows a small device called Riley Link to establish communication between insulin pump and CGM, so that it can automatically adjust basal insulin based on CGM trends. You gotta do a bit of work. I needed to do very basic coding, following amazingly detailed instructions, and built an app that loaded on V’s phone. Now instead of using her pump’s remote control she uses the phone app.

This is the set up with phone app and Riley link

I’ve waited for a long time for Loop to be compatible with Omnipod, so when it happened late spring we quickly jumped in.

Now, some loopers have amazing results. Their BG stays almost a flat line no matter what they do. But it takes a lot of work and dedication to dial in all the settings first. And it helps when people have predictive schedules and eating habits, and lean toward lower-carb diet. With a teen, we have chaotic schedule, higher carb diet, and stupid puberty hormones that constantly mess things up. Besides, teen’s cooperation to test settings is required. It’s easy enough to test overnight basal rates. But everything else that requires, during waking hours, either fasting and/or very careful and methodical consumption of exactly measured carbs to observe BG response to insulin, good luck!

Actual footage of my teen when I ask her to test settings

So, when we started looping I was aiming for two things: better and consistent control at night and decrease of burden. Improved A1C would be a bonus but not necessarily required, since it was already reasonable. I was not dreaming of straight lines. Good thing I wasn’t because we aren’t getting any! But we are getting the two primary goals accomplished.

Most nights are great. V stays and wakes up in reasonable range. Highs and lows still happen, but they are less frequent and less severe. We all are sleeping a lot better!

Last night’s graph. Started with a low that was caused by over-correcting earlier, but bounced back nicely and stayed in range all night.

V spends less time thinking about diabetes because Loop does a lot or work for her. When it predicts a low, it reduces or shuts off basal insulin, so it often results in “soft landing” in the 70’s or 60’s and then back to target range without needing to treat.

Loop has been suspending insulin for a while, so a bad low was avoided and BG recovered nicely by itself.

When V forgets to bolus (which happens more than I’d care to see), Loop tries to compensate with extra basal. What would easily be 400-500 BG without loop becomes 300’s.

Busted! Didn’t bolus till 1 hr after the meal. Loop working hard to compensate.

Still bad but much less bad and easier to get under control. Plus V loves using the phone instead of the clunky PDM.

And her A1C dropped 4 points without putting any more effort into Diabetes management. Sweet bonus.

So, no flat lines for us, especially during the day. But we are still better off with Loop than without it. And V’s endo is very supportive.

We’ll take it!

Comments are closed.