Patent ID: 8043291
Filing Date: 2011-10-25
Classification: A61B

Abstract:
1. A bone harvesting tool comprising: an elongated collection cannula having a proximal end, a distal end and a lumen extending between the ends, the lumen having a selected inside diameter from the proximal end toward the distal end; a cutting device having a proximal end removably mounted to the distal end of the collection cannula, a distal end configured for cutting bone tissue from a patient and a passage extending between the ends for permitting the cut bone tissue to advance proximally into the lumen of the collection cannula, the collection cannula and the cutting device having a combined length from the proximal end of the collection cannula to the distal end of the cutting device; a handle mounted to the collection cannula at a position near the proximal end of the collection cannula, the handle projecting transversely of the collection cannula to enable application of rotational force to the cutting device; a cap removably mounted threadedly substantially at the proximal end of the collection cannula, the cap having a convex semi-spherical proximal surface, and an opening having a non-threaded inner surface extending through the convex semi-spherical surface and communicating with the lumen of the collection cannula; and a non-threaded guide pin telescoped into the lumen of the collection cannula, the guide pin having a pointed distal end cross-sectionally dimensioned to project through the passage of the cutting device, a proximal end and a length exceeding the combined length of the collection cannula and the cutting device, the guide pin further having a diameter smaller than the selected inside diameter of the lumen of the collection cannula and smaller than the opening extending through the convex semi-spherical proximal surface of the cap, at least the proximal end of the guide pin being configured for reception in the opening in the cap, the guide pin further including a plug in proximity to the distal end of the guide pin, the plug having an outside diameter slightly smaller than the inside diameter of the lumen, the plug being slideable in proximal and distal directions within the collection cannula and being sufficiently large for urging collected bone tissue from the collection cannula in response to distally directed forces exerted on the proximal end of the guide pin.