Medical systems, devices and related methods

A medical device comprising:

• a handle including a proximal portion and a distal portion;
• a rotatable coupling assembly coupling the proximal portion and the distal portion of the handle;
• an insertion portion coupled to the distal portion of the handle and configured to be positioned within a body lumen;
• wherein the rotatable coupling assembly includes:
• a rod extending longitudinally through an interior portion of the proximal portion of the handle and configured to pivot about a pivot point;
• a first gear at a distal end of the proximal portion of the handle;
• a second gear engaged with the first gear, wherein a first articulation wire is coupled to the second gear;
• and
• a third gear engaged with the first gear, wherein a second articulation wire is coupled to the third gear;
• wherein, as the rod pivots about the pivot point, the first gear engages the second gear and the third gear to move the articulation wire and a distal portion of an insertion portion;
• and
• an articulation wire and a cautery wire extending from the handle through the insertion portion;
• wherein pivoting the proximal portion of the handle relative to the distal portion of the handle moves the first articulation wire and the second articulation wire relative to the insertion portion to bend a distal portion of the insertion portion.

A medical device comprising:

• a handle including a proximal portion and a distal portion;
• a rotatable coupling assembly coupling the proximal portion and the distal portion of the handle;
• an insertion portion coupled to the distal portion of the handle and configured to be positioned within a body lumen;
• an articulation wire and a cautery wire extending from the handle through the insertion portion;
• wherein the articulation wire is a first articulation wire, and
• wherein the rotatable coupling assembly includes:
• a rod fixedly coupled to the proximal portion of the handle and configured to pivot about a pivot point;
• a first gear at a distal end of the proximal portion of the handle;
• a second gear engaged with the first gear, wherein the first articulation wire is coupled to the second gear;
• and
• a third gear engaged with the first gear, wherein a second articulation wire is coupled to the third gear;
• wherein, as the rod pivots about the pivot point, the first gear engages the second gear and the third gear to move the articulation wire and a distal portion of the insertion portion.