Patent ID: 8632561
Filing Date: 2014-01-21
Classification: A61B

Abstract:
1. A surgical cutting device comprising: a) a catheter defining at least one longitudinal lumen, wherein the catheter has a distal end and a proximal end non-rotatably securable to a base; b) a cutting tip formed integrally with or disposed within the distal end of the catheter, comprising an outer cannula defining a lumen having a longitudinal axis between proximal and distal ends, an inner surface, and an opening at the distal end for receiving tissue, wherein the opening has a length extending along the longitudinal axis and a cutting edge for facilitating cutting of tissue; c) an inner elongated shaft member secured to the inner surface of the outer cannula at the distal end and extending toward the proximal end along the longitudinal axis, wherein the inner elongated shaft member further comprises a plurality of ridges extending radially from the inner elongated shaft member; and d) an inner cannula securable to a base and rotatably disposed within the lumen of the outer cannula and radially positioned between the inner surface of the outer cannula and the inner elongated shaft member, wherein the inner cannula has proximal and distal ends and at least one elongated cannula member extending along the longitudinal axis of the outer cannula and for at least the length of the opening, wherein the elongated cannula member further comprises: an edge positioned to rotatably interact with the cutting edge of the opening, and a plurality of interspaced blades positioned to rotatably receive the plurality of ridges extending radially from the inner elongated shaft member to facilitate the cutting of tissue, wherein the inner cannula rotates with respect to the outer cannula and the inner elongated shaft member.