What is an infusion set?
An infusion set is the system by which insulin is transferred from the pump into the body. It works very similar to an IV line and contains two primary components:
- The Cannula is a small, tapered tube with a fine needle at one end that is inserted into the subcutaneous fat layer just below the skin, usually in the abdomen, thigh, or buttocks. This spot is commonly called the infusion site. The other end of the tube attaches to the pump unit itself and moves basal and bolus insulin doses from the unit based on individual needs.
- Most infusion sets also include a quick-insertion device that makes it easy to insert the needle of the Cannula under the skin and provides for consistent insertions - usually at the push of a button. Some systems, such as the MiniMed Mio Infusion Set, integrate the cannula and insertion device into a single unit for maximum ease and convenience.
Replacing Infusion Sets
While an insulin pump is a permanent piece of equipment, infusion sets must be replaced every 2-3 days. Still, this is far easier and less painful for many people than administering multiple insulin shots each day with an insulin pen or syringe.
Tubeless Pumps & Infusion Sets
New advancements, such as the OmniPod Dash system, provide tubeless insulin delivery by combining the pump and infusion set into a single “pod” that attaches to the body. Insulin delivery is controlled wirelessly by a remote device without tubes or an external pump.
Along with infusion sets, PWDs who use an insulin pump must purchase compatible cartridges or reservoirs to hold the insulin. It is important to note that these are not universal. You must buy a cartridge or reservoir compatible with your prescribed insulin pump.
