Patent ID: 6312438
Filing Date: 2001-11-06
Classification: A61B

Abstract:
A rotary bur instrument comprisingan elongate outer member including an outer tube having an open distal end; andan elongate inner member rotatably disposed within said outer member and including an inner tube having a distal end, a lumen extending longitudinally therethrough and a bur tip disposed at said distal end of said inner tube extending distally from said open distal end of said outer tube, said bur tip having a distal end, a central longitudinal axis, a plurality of longitudinally extending flutes formed therein defining a plurality of cutting surfaces, a passage of uniform diameter extending longitudinally, entirely therethrough in communication with said lumen to define an aspiration passage through said inner member and a distal aspiration port at said distal end of said bur tip communicating with said aspiration passage, said distal aspiration port being coaxial with said central longitudinal axis and having a diameter the same as said uniform diameter.