Conformal, non-occluding sensor array for cardiac mapping and ablation

A method comprising:

• positioning a medical device at, or within, an anatomical structure of a patient, the medical device comprising a plurality of soft-electronic beams, each soft-electronic beam comprising:
• a first polymer substrate;
• a conductive layer coupled to the first polymer substrate, the conductive layer comprising a conductive trace electrically coupled to an electrode pad;
• a second polymer substrate forming one or more cavity portions between the first polymer substrate and the second polymer substrate;
• and
• a first inlet portion configured to receive a fluid;
• introducing the fluid via the first inlet portion to expand the one or more cavity portions such that the plurality of soft-electronic beams form a three-dimensional structure that conforms to the anatomical structure;
• and
• using the medical device to pass a signal between the-at least one electrode pad and a biological tissue of the anatomical structure.

A medical device comprising:

• a polymer structure defining a plurality of expandable regions comprising cavity portions formed between polymer layers, the plurality of expandable regions being arranged to form a three-dimensional configuration that conforms to an anatomical structure when expanded;
• a fluid inlet fluidly coupled to the plurality of expandable regions and configured to receive a fluid to expand the plurality of expandable regions;
• and
• a plurality of electrodes arranged as a sensor array on the polymer structure and electrically coupled to conductive traces.