Finding the pattern

I have been experiencing some wonky numbers lately. For me, the best solution to that problem is to do a little basal testing. Easy in theory – tough in practice. According to Pumping Insulin, and accurate basal test needs to start at least 5 hours after your last bolus and at least 3 hours after your last carb intake. Your starting blood glucose should also be in a good range (they suggest between 100 and 150).

Yesterday I got home from work surprisingly early and had a quick snack. That set me up for the ability to run a good basal test last night. I started at 9:30 pm, and tested every hour until 6:30 this morning.

Here are the results: 

basal testing

Well, isn’t that a helpful pattern. 

I especially like that at 11:21 pm my blood glucose was 146, at 12:18 pm it was 95, and at 1:19 am it was 141. If that doesn’t make me feel confident about my basal rates AND my glucose meter, I don’t know what does!

Waking up every hour is not my favorite thing in the world, and by the morning I think there were two other characters who weren’t exactly thrilled either.

whose bed is this?


  • Awwww, that last pic.

    You poor thing. I Hate basal testing.

    Stupid ‘betus. If you don’t cooperate how am I supposed to “adjust” you??? Ugh.

    Nice helpful, er, uh, graph.

    Hope you are resting. 😉

  • What a nightmare! CGMS is perfect for this, in the UK we can sometimes get the hospital to lend out a monitor for a couple of days so you can get a good view of trends. Would that be possible for you?

  • Oh yeah – THANK you for giving the proper definition of basal rate testing! So many people don’t understand that the idea behind this is to isolate variable so that you are *reasonably* sure that any changes you see in your blood sugar are a result of your basal insulin. And to do that requires fasting.

  • I always wonder how accurate the overnight tests are when you normally sleep, but instead are using energy/metabolism to wake up and test. I guess short of CGMS, it’s the best we have though.

  • I’m good with the nighttime basel test and the first thing in the morning one, it’s the day and afternoon/evening rate I can never seem to be in the right situation to get a test going. Whenever I seem to be close to being able to be in the right variables I get sooooo hungrey that there is just NO way I can deal with munching zero to low carb that would satisfy.

    Good luck Sara hope you figure things out.

    PS: Is it possible that you might be starting to come down with an illness?

  • Hi, seeing this post makes me feel as if I could never be a pumper. Do you need a doctorate in Bio-engineering? I was diagnosed 5 years ago at age 50 with Type 1. I became very thin and that is why my doctor suspected diabetes. I have been enjoying reading these blogs and today I posted a comment for the first time. I feel as if I know some of you guys. Thank you for sharing your thoughts and feelings and advice so honestly.

  • When i do this, I stay up all night and test every half hour. I’ve found a single all-nighter doesn’t affect basals. Two close together may. If there’s a significant change, I will re-test. I will re-test many anyway. It’s too big a commitment not to get it right.

  • I then take that info and put it into the basal estimator at It’s a bit clunky but hey presto I get a new basal profile and I flatline. It works for me but the technology is old and you have to input in exact format.

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