The impedance design aims to compile the pressures applied to the skin into a topographical map of the magnitude, phase angle and damage threshold. This could be used to detect pressure injury to underlying tissues, before it becomes visible. As the tissue progressively gets more injured the impedance magnitude and phase agles approach zero. The tissue would appear less capacitive and more conductive which is consistent with a loss of cell membrane.

In order for this design to accurately measure the impedance, a flexible electrode array will be fabricated using conductive paste. In the design sketch, the yellow dots are the electrods and the impedance will be collected for each pair of neighboring electrodes, spaced equidistantly.