1. A bipolar forceps tool comprising:a pair of prongs each prong having a shaft and a prong tip disposed distal to the shaft, the prong tip having a tissue contacting surface disposed thereon, the proximal end of each of the prongs terminating in a fixed connection point to a base;
the prongs being connected for relative movement of the prongs and associated movement of the tips;
an electrical supply system for applying an electric current between the tissue contacting surfaces of the prong tips;
an at least one strain sensor mounted on at least one of the prongs, the at least one strain sensor for measuring forces applied to the tissue contacting surfaces of the prongs;
wherein the at least one strain sensor is disposed between the tissue contacting surface and the fixed connection point; and
wherein the at least one strain sensor is located at a position of maximum deformation of the at least one prong upon application of force to an outer surface of the at least one prong.