Patent ID: 6280423
Filing Date: 2001-08-28
Classification: A61M

Abstract:
A catheter, comprising:(a) a hub; and(b) a flexible, generally elongated extruded conduit including an outer wall and defining at least two lumens, the conduit comprising:(1) a cylindrical proximal section extending from a proximal end coupled to the hub to a first point and having a constant first cross-sectional area along the length of the proximal section;(2) a frusto-conical middle section extending from the first point to a second point and having a second cross-sectional area at the second point, wherein the first cross-sectional area is larger than the second cross-sectional area; and(3) a cylindrical distal section extending from the second point to a distal end and having the second cross-sectional area constantly along the length of the distal section, wherein a thickness of the outer wall smoothly increases in a distal to proximal direction over at least a transition zone of the conduit with a concomitant increase in cross-sectional area in a distal to proximal direction of each of two of the at least two lumens over at least the transition zone.