Chapter: 6

Optimizing pump therapy

Square Wave and Dual Wave boluses

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 blood glucose too quickly. 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 self-test, 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.

This graphic shows: See the following graphic for a description of the different bolus types:

Entire bolus amount delivered immediately.

 

Part of the bolus amount delivered

Bolus amount delivered evenly

immediately. Remainder delivered

over specified time period.

evenly over time period

INSULIN

NORMAL

BOLUS

1

SQUARE WAVE

BOLUS

2

TIME

 

DUAL WAVE

 

BOLUS

Now

3

Portion

 

Square

 

Portion

Optimizing pump therapy 83

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Energizer 515, 715 manual Optimizing pump therapy, Square Wave and Dual Wave boluses