Re: [IP] Re: Medtronic to Animas
I am not referring to the IOB feature. I just tested my 2020, and sure
enough, it does NOT subtract for a BG lower than target. So, if I test, and
am low and overeat, as I'm sure we all have done, to compensate for the
low..then, once stable, try to bolus to correct for the overcompensation-the
pump does NOT take into consideration that the starting BG was below target.
I just did it now-
entered Carbs of 60g
entered BG of 2.3 (I'm in Canada, in US units this would be 41.4) and it is
telling me to take 15U of insulin, based on the carbs alone, showing nothing
for the BG. I was just trying to figure out if somewhere "hidden" it is
taking the BG into act, but after much playing around, I'm 99.99% sure that
----- Original Message -----
From: "Mark Schweim" <email @ redacted>
To: <email @ redacted>
Sent: Wednesday, March 26, 2008 1:04 PM
Subject: Re: [IP] Re: Medtronic to Animas
> With BOTH, the IR1250 I started with AND my 2020 (I now have)... My
> 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
> 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
> 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
> Then it will add the needed Correction Bolus amount (which in this case is
> NEGATIVE number, so adding it to the carb Bolus amount ends up DEDUCTING
> "correction Bolus" needed from the needed Carb Bolus. Then, it will
> correctly take the TOTAL calculated bolus from previous step, and DEDUCT
> 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
> ADDITIONAL Bolus.
> If I currently had NO IOB, the pump would have told me I should take a
> 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
> the current IOB AND the Bolus equivalent Insulin amount below goal from
> meal Bolus found by using the EZCarb Bolus WITH an entered BG that is
> your target BG level.
> 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
> carb Bolus amount... But in this case, the Animas pump deducts the IOB
> 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
> 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.
> 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
> If my BS is 70 or below it will not show a bolus amount, not that I would
> take a bolus with that low of a BS. Do you have the Animas2020 or an older
> 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
> subtraction in my head.
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