A biopsy instrument comprises an elongated flexible tube having a sharpened metal sleeve affixed to its distal end. An anvil member is affixed to the distal end of an elongated rod or wire which fits through the lumen of the tube and which is reciprocally moveable in the longitudinal direction by appropriately...http://www.google.com/patents/US5085659?utm_source=gb-gplus-sharePatent US5085659 - Biopsy device with bipolar coagulation capability
