User guide

Optimizing pump therapy 77
Chapter 6
Optimizing pump therapy
Square Wave and Dual Wave bolus
Square Wave bolus delivers a bolus evenly over a period of time (30 minutes to 8-hours). This bolus
can be used for insulin delivery when you have eaten a long meal with extended snacking. It can also
be useful if you have delayed food digestion due to gastroparesis or meals high in fat. A Square Wave
bolus can be useful if a Normal bolus drops your BG too rapidly. Since the Square Wave portion
extends over a period of time, the insulin is more likely to be available to match your individual
needs.
NOTE - During delivery of a Square Wave bolus, you will not be able to do the following pump
functions: change the max bolus amount, disable or deliver Dual and Square Wave boluses, do a
fixed prime or rewind, change the active insulin time, run a selftest, or access the User Settings
menu. All other pump functions are still available during the Square Wave bolus.
Dual Wave bolus delivers a combination of an immediate Normal bolus followed by a Square Wave
bolus. The Square Wave portion is delivered evenly over a period of time. A Dual Wave bolus is useful
for meals with both rapidly and slowly absorbed carbohydrates. For example, a Dual Wave bolus
would be appropriate for fruit and crackers followed by pasta. The Dual Wave option meets both
immediate and extended insulin needs. A Dual Wave bolus is also useful for correcting elevated blood
glucose before a meal.
See the following graphic for a description of the different bolus types:
TIME
123
INSULIN
NORMAL
BOLUS
SQUARE WAVE
BOLUS
DUAL WAVE
BOLUS
Entire bolus amount
delivered immediately
Bolus amount delivered evenly
over specified time period.
Part of the bolus amount delivered
immediately and the remainder
delivered evenly over time period
Now
Portion
Square
Portion