Patent ID: 7635347

Claim:
A catheter comprising: an outer tubular member having an inner surface defining a lumen extending between a proximal end and a distal end of the outer tubular member, wherein a first portion of the outer tubular member has a first stiffness and a second portion of the outer tubular member has a second stiffness less than the first stiffness; an inner tubular member having a proximal end, a distal end and a lumen extending therethrough, the inner tubular member disposed within the lumen of the outer tubular member, the inner tubular member having an inner layer defining an inner surface of the inner tubular member and an outer layer defining an outer surface of the inner tubular member; an inflation lumen defined between the outer surface of the inner tubular member and the inner surface of the outer tubular member; and a balloon attached to the distal end of the outer tubular member and the distal end of the inner tubular member, wherein the balloon is in fluid communication with the inflation lumen; wherein the inner layer of the inner tubular member is disposed partially in the outer tubular member and partially in the balloon; wherein the outer layer of the inner tubular member is disposed partially in the outer tubular member and partially in the balloon; and wherein the inner layer of the inner tubular member is separated from the balloon by the outer layer of the inner tubular member.