A rotatable endoscopic surgical snare having an operating loop which is rotatable about the longitudinal axis of a torque transmitting center member connecting the operating loop to an electrical power supply. The operating loop is retractable and protractable into and from a protective flexible sheath....http://www.google.co.uk/patents/US3955578?utm_source=gb-gplus-sharePatent US3955578 - Rotatable surgical snare
