Patent ID: 7410602
Filing Date: 2008-08-12
Classification: A61M

Abstract:
1. A method of making a catheter comprising: extruding a generally elongated conduit wherein the conduit is formed by being pushed through a die at an extrusion rate while being pulled from the die at a pulling rate, after the method is completed, the catheter comprising an end product in which the conduit includes an outer wall, the conduit defining at least two lumens, the conduit being formed so that a thickness of the outer wall smoothly increases from a first end to a second end of a transition zone of the conduit and so that a cross-sectional area of each of two of the at least two lumens increases from the first end to the second end of the transition zone, wherein an internal divider is formed so that a thickness of the internal divider increases from the first end to the second end of the transition zone of the conduit.