Insertion device positioning guidance system and method

A guidance system for positioning an enteral tube comprising:

• an electromagnetic field generator configured to be positioned externally to a subject's torso, said electromagnetic field generator configured to generate an electromagnetic field covering a treatment area;
• an enteral tube comprising an electromagnetic sensor, said electromagnetic sensor configured to sense its location and/or orientation relative to the electromagnetic field;
• a reference sensor configured to be positioned, within the treatment area, on the subject's torso, the reference sensor configured to define a reference coordinate system representing the position and orientation of the subject's torso relative to said field generator, the reference sensor configured to be positioned independently of the insertion of the enteral tube;
• a registration sensor configured to mark at least a first and a second anatomic location and/or orientation on the subject's torso;
• and
• a processing circuitry configured to
• read signals obtained from said reference sensor and said registration sensor, and calculate an orientation of the subject relative to said field generator, based thereon;
• load a predefined anatomical map representing a torso;
• align the map based on the first and a second anatomic location marked by the registration sensor and the calculated orientation of the subject, and
• show on the map a path of the enteral tube insertion with respect to the first and second anatomic locations;
• wherein the path is generated according to changes in the strength of the electromagnetic field sensed by the tip sensor's during the insertion of the enteral tube.