Device (1) suitable for being ingested by a patient comprising a disaggregative matrix (12) that is designed to disaggregate in a digestive segment and a plurality of independent passive RFID markers (11) that are housed together in the disaggregative matrix (12) the disaggregative matrix (12) being shaped so that when it disaggregates the RFID markers (11) separate from one another and are no longer mechanically connected so that each RFID marker (11) is able to move independently of the other RFID markers (11) in a plurality of segments of the digestive system of the patient the RFID markers (11) each being in the disaggregative matrix (12) protected by a hermetic encapsulation in a biocompatible material.
