Apparatus and method of making a variable stiffness multilayer catheter tubing

摘要

A catheter body having a variable stiffness along its longitudinal length and a method for manufacturing same is disclosed wherein an inner layer having an uninterrupted length serves as a backbone for segments of coextrusion of, e.g., Pebax or nylon and a tie layer which are then bonded to the backbone to create a multi-stiffness catheter body.

主权项

1. A variable stiffness catheter tubing, comprising:
a multi-layer extrusion having an outer layer and an inner layer, a portion of the outer layer peeled away from the inner layer at a first end; a first extrusion segment placed over the inner layer at the first end where the outer layer has been peeled away and joined to the outer layer of the multi-layer extrusion, where the inner layer of the multi-layer extrusion is uninterrupted.