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Understanding PDM and Pod Function 1212 Understanding PDM and Pod Function
Example 3: Eating 45 g carbs, BG of 5.6 mmol/L is at target, 1 U meal IOB
Duration of Insulin Action = 4 hours.
ree hours ago, you delivered a 4 U bolus (4 U meal bolus) because you were
eating. ere was no correction bolus because your blood glucose was at your
Target BG.
Now, three hours later and just before your next meal, there is 1 U of IOB from the
previous meal, which is a 1 U meal IOB. ere is no correction IOB because the
earlier bolus had no correction component.
Correction Bolus
0 U
Blood glucose is at target, so the
correction bolus is zero.
BG = 5.6, Target BG = 5.6
Correction Factor = 2.8
(5.6-5.6) / 2.8 = 0 U
Meal IOB adjustment
Meal IOB = 1 U
N/A: Correction bolus is <= 0 U
The correction bolus is zero, so
the meal IOB is not subtracted.
Correction IOB adjustment
Correction IOB = 0 U
N/A: Correction bolus is <= 0 U
No IOB adjustment.
Meal Bolus
3 U
Carbs = 45 g, IC Ratio = 15 g/U
45 / 15 = 3 U
You are eating 45 g carbs.
With your IC ratio at 15 and no
correction IOB adjustment, the
meal bolus is 3 U.
Correction IOB adjustment
Remaining correction IOB = 0 U
3 U - 0 U = 3 U
No IOB adjustment is made.
There is no correction IOB, and
meal IOB is never subtracted
from a meal bolus.
Calculated Bolus
3 U
Even though there was a 1 U
meal IOB, it did not reduce the
calculated bolus.
Your Adjustment
0 U
Total Bolus
3 U
Effective Date: 27SEP2019, ECO-000240
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