Patent ID: 8109903

Claim:
A catheter comprising: a tube having at least one lumen; at least one elongate element, at least part of which is extendable forwardly of a distal end of said tube to a fixed orientation at which a distal end of said at least one elongate element extends beyond said distal end of said tube by a fixed amount; and at least one selectably inflatable balloon communicating with at least one of said at least one lumen, said at least one selectably inflatable balloon having a forward end and a rearward end, said rearward end of said balloon being located adjacent said distal end of said tube at a rearward balloon end mounting location and said forward end of said balloon being located adjacent a distal end of said at least one elongate element at a forward balloon end mounting location, wherein said balloon is configured such that when said at least one elongate element is in said fixed orientation and said balloon is in a deflated operative orientation, the distance between said rearward balloon end mounting location and said forward balloon end mounting location is greater than the distance between said rearward balloon end mounting location and said forward balloon end mounting location when said balloon is in an inflated operative orientation, said balloon being symmetric and said at least one elongate element being incompressible along its length, whereby inflation of said balloon causes bending of said at least one elongate element and said bending of said at least one elongate element causes said balloon to assume an asymmetric inflated balloon configuration.