# Re: [IP] Ketones

```We do something similar (learned it from the IP list
and MiniMed's Insulin Pump Therapy Book)!

When my daughter gets over a certain bg she requires
more insulin (usually requires ~1:50 but if really high
[over ~300] or with ketones, ~1:35).
For corrections we use the following formulas:

actual bg - target bg / insulin sensitivity factor (if
high) - tells how many units of insulin to use to
correct a high either by itself or in addition to a
meal bolus if high at meal time
and
actual bg - target bg / carb-to-insulin ratio (if low)
- tells how many grams of carb to use to bring up a low
or subtract from the meal carbs if low at meal time

(using these ratios as an example):
target bg 100
insulin/carb ratio 1u:20g
insulin sensitivity factor 1u:53pts
bg/carb ratio 3.6pts/1g

ex. of high: bg 250 ... 250-100 = 150, 150/53 = 2.8u

ex. of  low: bg 60 ... 60-100 = -40 (ignore the
negative), 40/3.6 = 11g carb

I don't do these calculations every time we correct...I
made some charts based on these formulas so all we have
to do is refer to them (they are mostly for me though -
daughter has most of them memorized - though she is
able to do these calculations if needed). :)

--
Take care, Kerri, mom of Shannon-11, dxT1 5.3yrs,
pumping 2.3yrs, and 7 other blessings
http://www.geocities.com/southard8/photos.html
~*~do-`da-ga-g`hv-i (until we meet again)~*~

James said:
(some snipped)
One thing that my endo has me doing that I have not
is this.  When my BS gets above 200, I change the
formula for the
"supplemental insulin addition" to my bolus. I change
from using 1 unit per
30 mg/dL (<200) to using 1 unit per 20 mg/dL (>200).

For example, with a 150, I would add 2 units to my
regular bolus
(150-2(30)=90. I would expect to have a BS near 90 at
my next meal.
With a BS over 200 the 1 to 30 ratio does not get it.
With a 200, I use
200-5(20)=100 (close enough). I would expect to have a
100 before my nest
meal.

Anyone else doing this?-James
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