# LOOP cut insulin in HALF HOW?

**URL:** <https://forum.fudiabetes.org/t/loop-cut-insulin-in-half-how/9453>\
**Category:** Gear\
**Created:** [March 16, 2020, 8:55pm UTC](https://forum.fudiabetes.org/t/loop-cut-insulin-in-half-how/9453 "2020-03-16T20:55:19Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bpollina](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/bpollina/32/7413_2.png) [@bpollina](https://forum.fudiabetes.org/u/bpollina)\
**Post date:** [March 16, 2020, 8:55pm UTC](https://forum.fudiabetes.org/t/loop-cut-insulin-in-half-how/9453/1 "2020-03-16T20:55:19Z")

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I have an upcoming colonoscopy (although with Covid19 I’m going to reschedule for later this summer) and my endo said during prep and day of, just cut the insulin in HALF.

How would I do that in LOOP?

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**Author:** ![Chris](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/chris/32/382_2.png) [@Chris](https://forum.fudiabetes.org/u/Chris)\
**Post date:** [March 16, 2020, 8:57pm UTC](https://forum.fudiabetes.org/t/loop-cut-insulin-in-half-how/9453/2 "2020-03-16T20:57:24Z")

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Honestly, getting put under anesthesia for me would necessitate making things simpler so care givers have a hope of figuring it out. Can you just go back to standard pump function for the prep and procedure day?

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**Author:** ![Eric](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/eric/32/9209_2.png) [@Eric](https://forum.fudiabetes.org/u/Eric)\
**Post date:** [March 16, 2020, 9:26pm UTC](https://forum.fudiabetes.org/t/loop-cut-insulin-in-half-how/9453/3 "2020-03-16T21:26:53Z")

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> [@bpollina](#):
>
> my endo said during prep and day of, just cut the insulin in HALF.
> 
> How would I do that in LOOP?

You can just change your basal rates in Loop to half or your normal basal settings (write down the old ones first, or take a screenshot of them before changing). And on surgery day, turn off Closed Loop and just **run it in Open mode with the changed rates.**

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…and how do you know what your correct rates are when Loop is in Open instead of Closed?

Because you are an FUD member and you are paying attention to threads like this:

> [@A thought for Basal-IQ, Control-IQ, and Loop users](https://forum.fudiabetes.org/t/a-thought-for-basal-iq-control-iq-and-loop-users/9218):
>
> I wanted to share something that came to mind recently. If you are using any of the closed loop setups, imagine that for months and months your pump and CGM are churning along and making automatic adjustments. It takes whatever your normal basal profile is and automatically adjusts it up and down (or just down in the case of Basal-IQ), based on what your CGM says. All well and good…except if you aren’t paying attention to the changes it might be having to make all the time to your normal basa…

And because you are doing that well before the surgery - not the day of - you know what the correct basal rates are when Loop is Open instead of Closed.

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**Author:** ![Millz](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/millz/32/12204_2.png) [@Millz](https://forum.fudiabetes.org/u/Millz)\
**Post date:** [March 17, 2020, 4:33am UTC](https://forum.fudiabetes.org/t/loop-cut-insulin-in-half-how/9453/4 "2020-03-17T04:33:16Z")

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You can set a temp override on Loop (via the 💜 icon in the lower right of the main loop screen) to deliver 50% less insulin than current settings, select how long you want the override to last, then select the target range for the override duration.