Patent ID: 8850897

Claim:
A method of sensing dimensional changes, stress changes or pressure changes on a substrate attached to body parts within a patient's body comprising: temporarily and non-destructively attaching a piezoresistant sensor to a surface attached to a patient's body, the piezoresistant sensor comprising an electrically conductive elastic body having at least one pair of opposed ends, and the elastic body consisting essentially of a single layer conductive nanotubes homogeneously distributed therein, the elastic body having at least one surface with two opposed ends and electrodes at each of the opposed ends of the single layer, passing a current through the elastic body between the two electrodes while within the patient's body, sensing the current passing through the elastic body only through the single layer, performing a mechanical step on the substrate that causes stress, strain or elongation on the conductive elastic body while within the patient's body, and measuring changes in the current between the electrodes on only the single layer.