Patent ID: 7918817

Claim:
A multiple catheter assembly, comprising: a first catheter comprising a first outer surface defining at least a first lumen extending therethrough along a first longitudinal axis, the first outer surface comprising a first body and a first distal tip in which the first outer surface comprises a first cross-section taken perpendicular to the first longitudinal axis, the first outer surface further comprising a first transition region between the first distal tip and the first body, the first transition region transitioning the first outer surface from the first cross-section at the first distal tip to a cross-section of the first body different from the first cross-section, the first lumen comprising a first distal end region terminating in the first distal tip and a first lumen cross-section taken perpendicular to the first longitudinal axis at the first distal tip, the first lumen further comprising a first lumen transition region between the first distal tip and the first body; and a second catheter comprising a second outer surface defining at least a second lumen extending therethrough along a second longitudinal axis, the second outer surface comprising a second body and a second distal tip in which the second outer surface comprises a second cross-section taken perpendicular to the second longitudinal axis, the second cross-section different from the first cross-section, the second outer surface further comprising a second transition region between the second distal tip and the second body, the second transition region transitioning the second outer surface from the second cross-section at the second distal tip to a cross-section of the second body different from the second cross-section, the second lumen comprising a second distal end region terminating in the second distal tip and a second lumen cross-section taken perpendicular to the second longitudinal axis at the second distal tip, the second lumen cross-section different from the first lumen cross-section, the second lumen further comprising a second lumen transition region between the second distal tip and the second body, wherein the first lumen transition region transitions the first lumen from the first lumen cross-section at the first distal tip to a third lumen cross-section different from the first lumen cross-section, wherein the second lumen transition region transitions the second lumen from the second lumen cross-section at the second distal tip to a fourth lumen cross-section different from the second lumen cross-section, wherein the first and second lumens are independent from each other for facilitating simultaneous flow in opposite directions, and wherein the first and second outer surfaces of the first and second catheters are releasably joined by a splittable bond for allowing the first and second catheters to be at least partially longitudinally split from each other.