Patent ID: 7481800

Claim:
A multi-lumen balloon catheter comprising: a sheath comprising a main body and a distal end extending distally from the main body and a plurality of lumens comprising a first lumen, second lumen, and third lumen; the third lumen formed in the sheath wherein a first portion of the third lumen extends at least partially through the main body and has a first shape in cross section and wherein a second portion of the third lumen extends at least partially through the distal end and has a second, different shape in cross section; the second lumen extending at least partially through the main body and partially through the distal end; the first lumen extending at least partially through the main body and partially through the distal end; a balloon attached about the distal end; and a taper portion extending proximally from the distal end, wherein the outside diameter of the sheath at the distal end is smaller than the outside diameter of the sheath at the proximal end of the taper portion, the plurality of lumens extending through the taper portion.