Insertion tube for a medical device with slot patterns

A medical device shaft, comprising:

• an insertion tube, wherein the insertion tube includes;
• a plurality of slots arranged in a generally helical pattern along a length of the insertion tube;
• ​ a plurality of intervals separating the plurality of slots, the intervals comprising:
• a plurality of helical intervals extending circumferentially, wherein the helical intervals are circumferentially offset such that the plurality of slots is staggered;
• a plurality of longitudinal intervals extending along the length of the insertion tube, wherein the longitudinal intervals define a longitudinal space between the plurality of slots;
• and
• a plurality of continuous load paths along a torsional axis, wherein the plurality of continuous load paths form intersecting helices along the insertion tube, wherein a plurality of nodes is formed at intersections between continuous load paths.