# Re: [IP] Re: Medtronic to Animas

```With BOTH, the IR1250 I started with AND my 2020 (I now have)...  My Target
BG was/is set to 120.

If my BG is 125, and I last did an EZBg (correction) Bolus, leaving 0.65
units IOB...  That 0.65 units will cause my BG to drop another 50, ending up
around 75, possibly lower.  Therefore, logic would say the pump SHOULD
figure how much of the IOB is needed to drop me ONLY TO my target, and
subtract any excess IOB from the carb bolus...  IT DOES NOT DO THIS!!!
Fortunately, I know how to program spreadsheet coding, and have Excel in my
Garmin Ique M5 GPS, which I use to correctly figure the Bolus doses.

If my BG is 115, and I still have 0.65 units IOB from previous EZBg
(correction) Bolus...  In THIS CASE, the pump WILL CORRECTLY figure  how
much Insulin I'd normally need for the grams carbohydrate I plan on eating.
Then it will add the needed Correction Bolus amount (which in this case is a
NEGATIVE number, so adding it to the carb Bolus amount ends up DEDUCTING the
"correction Bolus" needed from the needed Carb Bolus.  Then, it will
correctly take the TOTAL calculated bolus from previous step, and DEDUCT ALL
the remaining IOB from the total carb bolus amount.

For 8 gram carb snack, it says I should need a 0.38 unit Bolus
With an ISF of 80, and current BG of 115, it says I need a -0.06 unit
Correction Bolus.
My current IOB is 0.58 units.

The pump is now telling me for a meal needing the 0.38 unit Bolus, with
current BG & IOB figured in, I should currently take ABSOLUTELY NO

If I currently had NO IOB, the pump would have told me I should take a meal
Bolus of 0.30 units (0.38 plus the -0.06 correction (equaling 0.32 units
needed) rounded to the nearest available Bolus dose.)

So YES!!!  BOTH the Animas IR1250 and the Animas 2020 pumps DO DEDUCT BOTH,
the current IOB AND the Bolus equivalent Insulin amount below goal from any
meal Bolus found by using the EZCarb Bolus WITH an entered BG that is BELOW

The only flaw I've noticed in the Animas Bolus calculations is that it
SHOULD ALWAYS, if previous Bolus was an EZBG Bolus, figure how much
remaining IOB is likely needed to get me to my target, and if there is
excess IOB, that excess should almost ALWAYS be DEDUCTED FROM the calculated
carb Bolus amount...  But in this case, the Animas pump deducts the IOB from
the needed Correction Bolus amount, but if BG is above target, it simply
IGNORES the excess IOB and will say you need the FULL amount of Carb Bolus,
even if you really have enough excess IOB to cover the FULL amount of
Insulin the meal would require AND get the current BG down to your target.

Mark

Used Animas IR1250... June 2006 - July 2007.
Using Animas 2020 ...  July 2007 - present.

-----Original Message-----

Date: Tue, 25 Mar 2008 09:33:05 -0700 (PDT)
From: lisa miller <email @ redacted>
Subject: Re: [IP] Re: Medtronic to Animas

My Animas2020 pump does subtract from my bolus, when my BS is below the
target
range.
If my BS is 70 or below it will not show a bolus amount, not that I would
ever
take a bolus with that low of a BS. Do you have the Animas2020 or an older
model?
Lisa

Kathleen Weaver <email @ redacted> wrote:

> One thing that is a great concern-when my BG is less than my target, it
> doesn't seem to factor this into the calculation. Am I missing something?

Yes, that is the weird part of the Animas series. If your blood
glucose is less than your target, it does not subtract from your
insulin total.

Not sure why. If it is really a big difference, I'll do the

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