Use Instructions

263
Understanding Insulin Delivery and Calculations23
Bolus Calculator equations
e Bolus Calculator rst calculates a preliminary (prelim.) correction and meal
bolus. It then adjusts these preliminary values for IOB, if applicable. e nal
suggested bolus is equal to the sum of the resulting correction bolus and meal
bolus.
Note: Your adjustments from CGM trend can add or subtract insulin from the
correction and/or the meal portion.
Preliminary correction bolus = Current BG or CGM - Target BG
Correction Factor
Example: Current BG or CGM: 200 mg/dL, Target BG: 150 mg/dL
Correction Factor (CF): 50
200 mg/dL – 150 mg/dL = 1 U prelim. correction bolus
50
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
Final 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.
Note: A correction bolus is never reduced below 0 U.
Final 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.
Note: A meal bolus is never reduced below 0 U.
Calculated bolus = nal correction bolus + nal meal bolus
Reverse Correction bolus calculation: If the Reverse Correction feature
is turned ON and if your current blood glucose is below your Target BG
but above your Minimum BG for Calcs, the Bolus Calculator subtracts a
correction amount from the preliminary meal bolus.
Meal bolus with Reverse Correction = Reverse Correction + prelim meal bolus
Example: Current BG or CGM: 75 mg/dL, Target BG: 150 mg/dL
Correction Factor: 50, Preliminary meal bolus: 2.5 U
75 mg/dL – 150 mg/dL = -1.5 U Reverse Correction
50
- 1.5 U (Reverse Correction) + 2.5 U (prelim meal bolus) = 1.0 U meal bolus
Additional
Information
Effective Date: 22DEC2020, PCO-000267