(a) 3D schematic of the presented platform for multiplex drug susceptibility testing, (b) Cancer cells are placed in a 3D matrix in a separate microchannel (green) that is connected to a parallel microchannel for drug flow (red), (c) Cancer cells are intact and viable in the 3D gel structure and before the introduction of drugs. In the presence of effective drug flow, the cancer cells respond (lyse), (d) We observed that the number of intact cancer cells reduced after introducing effective drug flow in the chip, (e) Image of a fabricated device. The chip involves interdigitated electrodes with 10 μm width and spacing.