Interventional medical device component having an interrupted spiral section and method of making the same

A component of an interventional neurovascular implant medical device, the component being movable through a micro-catheter within a body neurovascular vessel, comprising:

• a generally hollow tubular portion including a spiral ribbon having adjacent turns, said ribbon being between a helically oriented pathway of a plurality of open sections alternating with bridge members in end-to-end fashion along the helically oriented pathway, each bridge member being out of axial alignment with each bridge member immediately adjacent thereto,
• wherein said spiral ribbon defines a relatively rigid region, a relatively flexible region, and a first transition region between the relatively rigid region and the relatively flexible region,
• wherein the helically oriented pathway has a first pitch in the relatively rigid region, a second pitch in the relatively flexible region, and a third pitch in the first transition region, the first pitch being greater than the third pitch and the third pitch being greater than the second pitch, and
• wherein each bridge member has an arcuate extent in a range of approximately 10° and approximately 65°, wherein each cut section has an arcuate extent in a range of approximately 45° and approximately 270°, and wherein for each bridge member, a sum of the arcuate extents of said bridge member and of a cut section adjacent to said bridge member in said end-to-end fashion is neither a whole number factor of 360° nor a multiple of 90°.