Methods and apparatus for the characterization of formation fluids are disclosed. The ablation instrument generally includes two components: a first member adapted to be placed on or adjacent to a first tissue surface, and a second member opposed to the first member and adapted to be placed on or adjacent to a second, opposed tissue surface. Data communication in the network is performed in conformity with the device protocol. The peripheral border frames an access opening between the first inverted pocket and the second inverted pocket. The first engagement members are radially movable by the actuator between a projecting and a retracted position, and the second engagement members project radially into a gap between the torque input member and the torque output member. Each row is colored by one of a first color, a second color, a third color, a fourth color and a fifth color with the colors defining an alternate cultural group.