A catheter includes a catheter body defining first and second lumens, and a wire having first and second segments each with a greater stiffness, and a middle segment with a lesser stiffness. The wire is in an elastically deformed access state where the middle segment extends from an opening to the first lumen to an opening to the second lumen and forms a smaller loop. The wire is adjustable via sliding the first and second segments in opposed directions to an elastically deformed treatment state where the first segment extends from the opening to the first lumen to the opening to the second lumen and forms a larger loop.
