Subcutaneous Infusion Sets (Insulin Infusers)

Subcutaneous infusion sets, also called insulin infusers, provide an alternative to injections. A catheter (a flexible hollow tube) is inserted into the tissue just beneath the skin and remains in place for several days. Insulin is then injected into the infuser instead of through the skin.

source: http://diabetes.niddk.nih.gov/dm/pubs/insulin/index.htm