Patent ID: 8685074

Claim:
A catheter system comprising: a catheter, the catheter comprising an expandable balloon and an elongate advancement member, the expandable balloon defining an interior and having a diameter and a length, the expandable balloon further having an unwrapped state and a rewrapped state, in the unwrapped state the diameter being greater than in the rewrapped state, the length in the rewrapped state being at least as great as the length in the unwrapped state, the advancement member comprising a proximal end region and a distal end region, at least a portion of the distal end region of the advancement member extending through the interior of the expandable balloon, the at least a portion of the distal end region of the advancement member being engaged to a distal end region of the balloon, the advancement member having a first state and a second state, in the first state the at least a portion of the distal end region of the advancement member being spirally disposed about a longitudinal axis of the catheter, in the second state the at least a portion of the distal end region of the advancement member being substantially parallel to the longitudinal axis of the catheter, wherein when the advancement member is in the first state the expandable balloon is in the unwrapped state, and when the advancement member is in the second state the expandable balloon is in the rewrapped state.