JOHN FREDERICK STOCK
Pilots at 115 St, Kensington, MN

5158561, Oct 27, 1992

Mar 23, 1992

7/856306

Mark A. Rydell - Golden Valley MN
John F. Stock - Kensington MN
John L. Zenk - Hutchinson MN

Everest Medical Corporation - Minneapolis MN

A61B 1700

606113

A monopolar electrosurgical instrument for excising polyps from the gastrointestinal tract comprises an elongated flexible plastic tube having a first monopolar electrode mounted a small predetermined distance from the distal end of the tubular member and a conductive wire loop affixed to a pull-wire, the pull-wire extending through the lumen of the tubular member and being connected at its proximal end to a plunger-type handle whereby the loop can be opened and closed by extending and retracting the loop relative to the distal end of the tubulr member. By incorporating both the surface electrode and the loop on the same instrument, polyps may be severed electrosurgically using the snare and the wound then immediately cauterized using the surface electrode, thus obviating the need to do an instrument exchange in the endoscope to accomplish both functions.