Integrated coil multi-material extusion for infusion set cannula

Abstract

Disclosed herein are cannula configurations and methods for making such configurations that closely replicate the functional properties of a coil reinforced cannula within a single extrusion. By using a multi-lumen process, a tube can be manufactured with a fluid path inner diameter surrounded by a number of smaller cores embedded in the tube wall. With this process, multiple materials can be used such that the smaller cores are a harder durometer than the softer tube wall. The result is a soft flexible tube embedded with rigid helical cores that can replace stainless-steel coil reinforced extrusion.

Dependencies are inferred from the claim text.