Patent ID: 9121806
Filing Date: 2015-09-01
Classification: A61B,G01N

Abstract:
1. A device for impedance measurement comprising: a substrate having an upper face and a lower face; a plurality of planar test electrodes disposed in a radial array on the upper face of the substrate, wherein each electrode consists essentially of gold having a diameter ranging from 50 μm to 500 μm, and wherein each test electrode terminates in planar electrode tip, wherein the electrode tip is thicker than the rest of the test electrode due to a thick layer of gold on the electrode tip; a cloning cylinder having an upper edge and a lower edge, wherein the lower edge is mounted to the upper face of the substrate, wherein the cloning cylinder defines an interior culturing space; a counter electrode mounted to the upper face of the substrate and disposed in the interior culturing space and out-of-plane with the test electrodes; a switching circuit in electrical contact with the test electrodes wherein the switching circuit is comprised of an AC power source, wherein the power source is adapted to alter the frequency of the AC current applied to the test electrodes.