Meal Bolus Calculation; Insulin-On-Board (Iob) Calculation; Examples Of Suggested Bolus Calculations - OmniPod CAT45E Guide De L'utilisateur

Meal bolus calculation

Carbs entered ÷ insulin-to-carb (IC) ratio
Example of meal bolus
Carbs entered: 45 grams of carb
Insulin-to-carb ratio: 15
45 carbs ÷ 15 I/C ratio = 3 units meal bolus

Insulin-on-board (IOB) calculation

(Duration of insulin action – time since your previous bolus) ÷
(duration of insulin action) * (previous bolus)
IOB from a previous correction bolus is called "correction IOB, "
and IOB from a previous meal bolus is called "meal IOB. "
Example of correction insulin-on-board (IOB)
Duration of insulin action: 3 hours
Time since previous correction bolus: 1 hour
Previous correction bolus: 3 units
3 hours – 1 hour = 2 hours
2 hours ÷ 3 hours = 2/3
2/3 * 3 units = 2 units correction IOB
In other words, one hour after your previous correction bolus,
you have received only 1 unit of insulin from it; 2 units of insulin
are still working to correct your BG. This feature prevents
delivering too much insulin when correcting a high BG.
Example of meal insulin-on-board (IOB)
Duration of insulin action: 3 hours
Time since previous meal bolus: 2 hours
Previous meal bolus: 4.5 units
3 hours – 2 hours = 1 hour
1 hours ÷ 3 hours = 1/3
1/3 * 4.5 units = 1.5 units meal (IOB)
In other words, two hours after your previous meal bolus, you
have received 3 units of insulin from it; 1.5 units of insulin are still
working to cover your meal.
Meal (IOB) is only used to reduce a correction bolus,
and the correction bolus is only reduced until it
becomes 0 units.

Examples of suggested bolus calculations

The examples below use these settings:
• Target BG: 5.6 mmol/L
• I/C ratio: 1:15
• Correction factor (CF): 2.8
• Duration of insulin action: 3 hrs
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