Patent ID: 8241245

Claim:
A co-axial catheter assembly comprising: a) a first catheter lumen extending along an axis, wherein the first catheter lumen has an open first distal end and a first proximal end; b) a second catheter lumen extending along the axis, wherein the second lumen is disposed generally within the first catheter lumen, and wherein the second lumen includes a second distal end and a second proximal end; c) a hub disposed at the first proximal end of the first catheter lumen and defining at least first and second passages extending therethrough, the second passage axially aligned with the first catheter lumen and the second catheter lumen, with the second proximal end of the second catheter lumen extending partially along the second passage proximally of the first proximal end of the first catheter lumen; and d) a hub spacer sized and configured to be simultaneously insertable into a hub proximal end and over and along the second proximal end of the second catheter lumen that centers the second proximal end with respect to the first proximal end of the first catheter lumen, wherein the first passage and second passage join within the hub to a distal catheter-receiving passageway of the hub, the hub spacer includes a distal end that is tapered to block access to the second passage from distally thereof about the second catheter lumen and to direct fluid flow through the first passage from a first extension tube, and wherein the hub spacer includes a key cooperable with a keyway of the hub for angularly orienting the hub spacer with respect to the hub.