Abstract: The present invention provides a device and method for displacing a lumen within a patient in-vivo during a surgical procedure. More specifically, the present disclosure relates to displacement control wires used in a heart ablation procedure for biasing a patient body portion, e.g., a wall of an esophagus away from or closer to the heart to prevent damage to the esophagus as a result of the heart ablation. The control wire is constructed from a shape memory material such as nitinol. The nitinol material is constructed and arranged to be substantially straight when cooled for insertion. Thereafter, when inserted into the body, the nitinol material takes on a curved orientation (preformed) as it is heated to body temperature. Rotation of the control wire allows the esophagus to be displaced as desired for the procedure.