A modified monopolar polypectomy snare for endoscopic high-frequency surgery in the gastrointestinal tract.

A modified instrument for endoscopic polypectomy is presented. The tip of the monopolar electrode is coated with a teflon-like material or ceramic for insulation. The other parts of the polypectomy snare are unchanged in comparison with conventional instruments. To date, the system has been used in 100 patients with gastrointestinal polyps. Symmetrical and asymmetrical snares with an insulated tip, rotatable in the axis of the guiding catheter, have been used with no complications occurring. The device is easy to use, reliable in clinical practice, and can be employed in conjunction with conventional high-frequency diathermy instruments. The polypectomy snare is inexpensive.