Accu-Chek Aviva Combo Advanced Owner's Booklet page 106

Correction Bolus
Generally, a correction bolus is only calculated if the current blood glucose value is above the hypo bG
warning limit and outside the target range. If the current blood glucose value is above the target range, the
currently allowed blood glucose value must also be exceeded. Only correction boluses greater than "0" trigger
a corresponding acting time.
Correction Bolus = (Current bG – Currently Allowed bG) ×
The blood glucose correction portion depends on the following requirements:
• If current bG > currently allowed blood glucose value, then blood glucose correction portion = current bG
– currently allowed blood glucose value
• If current bG > hypo warning limit and current bG < target range lower limit, then bG correction portion =
current bG – target range average value
100
Insulin
bG
from insulin sensitivity