Patent ID: 7664545

Claim:
A modular electrode system for introducing of a macromolecule into a muscle tissue in a body, comprising: a plurality of needle electrodes for penetrating the muscle tissue, the plurality of needle electrodes being mounted on a support structure and arranged non-symmetrically around a center point, and a constant-current pulse generator subsystem in electrical communication with the plurality of needle electrodes, wherein the constant-current pulse generator subsystem is capable of applying a decentralized constant-current pulse between any plurality of electrodes and the plurality of needle electrodes are constructed from a material that will make galvanic contact with the tissues; and a programmable constant-current pulse controller having an impedance meter in electrical communication with the plurality of needle electrodes and the constant-current pulse generator subsystem, wherein the programmable constant-current pulse controller is capable of maintaining a constant current independent of any resistance change in the muscle tissue during the decentralized constant-current pulse.