The Polar Wand by GI Supply, Camp Hill, Pa., is for controlled ablation of mucosal lesions throughout the gastrointestinal tract, including the esophagus, stomach, and rectum. The system consists of a portable cryogen-containing unit and a single-use flexible cryogen spray catheter, designed for use with CO2 that is supplied in standard 5-lb cylinders. Non-contact controlled delivery of the cryogen is achieved by a foot pedal. This spray technology gives the endoscopist the ability to quickly treat large areas and reduce procedure time. The cryogenic spray is applied to the target area until a whitened appearance of the mucosa is achieved.  Necrosis of the treated tissue occurs over a 24 to 48-hour period.