User Manual

Understanding and Delivering Bolus Doses
30
4
How a suggested bolus is calculated
The
suggested bolus calculator estimates the suggested amount
for each bolus portion based on your personal settings and
inputs.
The settings used to calculate a suggested bolus are:
• Target BG
• Insulin-to-carbohydrate (IC) ratio
• Correction factor (CF)
• Duration of insulin action
The inputs used to calculate a suggested bolus are:
• current BG
• carbs entered
• insulin on board (IOB)
A suggested bolus can have a correction bolus only, a meal bolus
only, or both.
Correction bolus: The correction bolus, as the name suggests,
“corrects” for a blood glucose (BG) level above your target BG
level.
Meal bolus: The meal bolus provides insulin for the carbohy-
drates you enter into the System.
Insulin on board (IOB): Insulin on Board (IOB) the amount of
insulin still working in your body from previous meal and correc-
tion boluses. The amount of time the insulin remains “on board”
or “active” depends on what you set for your duration of insulin
action.
For formulas for each element of the suggested bolus calcula-
tion, detailed examples, and additional guidelines of how the
suggested bolus calculator works, see the Appendix.
Figure 4-1
Figure 4-2
The OmniPod System can only subtract insulin on board
(IOB) from a suggested bolus when the current BG is
known.