A MOS transistor having an increased gate-drain capacitance is described. The devices are advanced in a minimally invasive manner within a patient’s body to create one or several divisions or plications within a hollow body organ. If a selected indicator is associated with the instruction, counting of each event associated with the execution of the instruction is enabled. An interface control unit with a digital interface is used by the chip to transmit data serially to an external device. A stiffness and curvature in the retainer facilitates the swift snap-wrap movement. Cross-correlation matrix eigenvalues or direct BER estimates for differing numbers of fingers determine whether one or two fingers assigned to the group of paths within a chip.