OmniPod UST400, Руководство пользователя

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Understanding PDM and Pod Function 12
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12 Understanding PDM and Pod Function
Bolus Calculator equations
The Bolus Calculator first calculates a preliminary correction and meal bolus. It
then adjusts these preliminary values for IOB, if applicable. The final suggested
bolus is equal to the sum of the resulting correction bolus and meal bolus.
Preliminary bolus calculations
Preliminary correction bolus
= Current BG - Target BG
Correction Factor
Example
: Target BG: 5.6 mmol/L, current BG: 11.2 mmol/L,
Correction Factor (CF): 2.8
11.2 mmol/L [current] – 5.6 mmol/L [target] = 2 U preliminary. correction bolus
2.8 [CF]
Preliminary meal bolus
= Carb intake
Insulin-to-carb (IC) ratio
Example
: Carb intake: 45 grams of carb, IC ratio: 15
45 (carbs) = 3 U preliminary meal bolus
15 (IC Ratio)
Reverse correction bolus calculation
: If the Reverse Correction feature is
turned on and if your current BG 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 corr prelim. meal bolus
Example
: Target BG: 5.6 mmol/L, current BG: 4.2 mmol/L,
Correction Factor: 2.8, Preliminary meal bolus: 1.5 U
4.2 mmol/L
[current]
– 5.6 mmol/L
[target]
= -0.5 U reverse correction
2.8 [
CF]
- 0.5 U (reverse correction) + 1.5 U (prelim meal bolus) = 1.0 U meal bolus
A reverse correction is only applied to the meal bolus. The meal bolus is
reduced by -0.5 units.