OmniPod 5 - Smartbolus Calculator Equations

237
Understanding SmartBolus Calculator Calculations 1818 Understanding SmartBolus Calculator Calculations
SmartBolus Calculator Equations
e SmartBolus Calculator rst calculates a preliminary correction and meal
bolus. It adjusts these values for IOB, if necessary. It then suggests a nal total bolus
that includes the adjusted correction bolus and meal bolus.
Note: Your adjustments from the sensor glucose trend can add or subtract insulin
from the correction and/or the meal portion.
Preliminary correction bolus = Current BG or Sensor - Target Glucose
Correction Factor
Example: Current BG or Sensor: 11.1 mmol/L, Target Glucose: 8.3 mmol/L
Correction Factor (CF): 2.8
11.1 mmol/L– 8.3 mmol/L = 1 U prelim. correction bolus
2.8
Preliminary meal bolus =
Carb intake
Insulin to Carb (IC) ratio
Example: Carb intake: 45 grams of carb, IC ratio: 15
45
= 3 U prelim. meal bolus
15
Correction bolus = (prelim. correction bolus - meal IOB) - correction IOB
e meal IOB is subtracted rst. If the preliminary correction bolus is still
above zero, then the correction IOB is subtracted.
Meal bolus = prelim. meal bolus - remaining correction IOB
Meal IOB is never subtracted from a meal bolus. Only a remaining correction
IOB is subtracted from a meal bolus.
Calculated bolus = correction bolus + meal bolus
Reverse Correction bolus calculation: If the Reverse Correction feature is
turned ON and if your current glucose is below your Target Glucose but above
your Minimum Glucose for Calculations, the SmartBolus Calculator subtracts
a correction amount from the preliminary meal bolus.
Meal bolus with Reverse Correction = Reverse Correction + prelim. meal
bolus
Example: Current BG or Sensor: 4.2 mmol/L, Target Glucose: 8.3 mmol/L
Correction Factor: 2.8, Preliminary meal bolus: 2.5 U
4.2 mmol/L – 8.3 mmol/L = -1.5 U Reverse Correction
2.8
-1.5 U (Reverse Correction) + 2.5 U (prelim. meal bolus) = 1.0 U meal bolus
A Reverse Correction is only applied to the meal bolus. In this example, the
meal bolus is reduced by 1.5 units, resulting in a meal bolus of 1.0 U.