Patent ID: 8070689
Filing Date: 2011-12-06
Classification: A61B

Abstract:
1. Perforating trocar comprising a rigid tube in which a rod with a perforating distal tip is able to slide, wherein the zone of the distal tip of the rod has the form of a perforating drill-bit that is able to turn on its axis, while the distal end of the tube includes recesses dividing the distal end into at least two segments with a helical cutting edge; with each recess having an axial outer end which intersects the distal end of the tube at axially spaced locations, and with each of said helical cutting edges extending helically from said axial outer end of one of said recesses to said axial outer end of another of said recesses, wherein the segments with a helical cutting edge of the distal end of the tube are separated by said recesses, which are cut through the wall of the tube, and with the base of each of the recesses inclined downward and outwardly to facilitate the evacuation of bone debris.