Systems and methods for mapping of gastrointestinal tract

A catheter system for obtaining a pressure profile of a gastrointestinal (GI) tract, the catheter system comprising:

• a catheter configured to be inserted endoluminally into the GI tract, the catheter including an outer sheath defining a first lumen and sensing unit enclosed within the first lumen, the sensing unit including:
• a support structure made of a shape memory material configured to transition from a first configuration to a second configuration, wherein the second configuration includes a first region shaped to conform to a first portion of the GI tract and a second region shaped to conform to a second portion of the GI tract that is distinctly shaped from the first portion of the GI tract;
• a flexible printed circuit board supported on the support structure;
• and
• a plurality of pressure sensors spaced apart along the flexible printed circuit board,
• wherein, following insertion of the catheter into the GI tract, the support structure causes the sensing unit to transition from the first configuration to the second configuration to position the plurality of pressure sensors to acquire pressure readings in three dimensions from the first portion of the GI tract and the second portion of the GI tract.