Bone graft harvest device

• US 20070118050A1
• Filed: 11/21/2006
• Published: 05/24/2007
• Est. Priority Date: 11/23/2005
• Status: Active Grant

• Current Assignee: Orthopedic Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Hospital For Special Surgery (The NewYork-Presbyterian Healthcare System, Inc.)
• Inventors: Accordino, Joseph
• Granted Patent: US 8,043,291 B2
• Time in Patent Office: Days
• US Class Current: 600/567
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• CPC Class Codes: A61B 17/32053 Punch like cutting instruments, e.g. using a cylindrical or oval knife A61B17/326 takes precedence; trepans A61B17/1695; for use on the cornea A61F9/007
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/062 penetration depth

Abstract

A bone harvesting tool includes an elongate hollow collection cannula with a lumen for receiving harvested bone tissue. Holes are formed through the collection cannula to permit visual observation of the volume of bone tissue that has been collected. Cutting blades are mounted to the distal end of the collection cannula and are configured for cutting into bone tissue. The cutting blades are aligned so that the harvested bone tissue advances proximally into the lumen of the collection cannula. A guide pin is telescoped into the collection cannula and through the blades. The guide pin is employed for initial positioning of the tool on the bone. A plug near the distal end of the guide pin enables the guide pin to be used for expelling the collected bone tissue from the collection cannula.

Claims

1. A bone harvesting tool comprising:

an elongated collection cannula having a proximal end, a distal end and a lumen extending between the ends;

a cutting device mounted to the distal end of the collection cannula and being configured for cutting bone tissue from a patient and permitting the cut bone tissue to advance proximally into the lumen of the collection cannula; and

a guide pin telescoped into and at least partly through the lumen of the collection cannula and the cutting device, the guide pin having a pointed distal end dimensioned to project beyond the cutting device and a proximal end projecting proximally beyond the collection cannula.

2. The bone harvesting tool of claim 1, further comprising a handle mounted near the proximal end of the collection cannula and configured for applying rotational force to the cutting device.

3. The bone harvesting tool of claim 1, further comprising a cap mounted substantially at the proximal end of the collection cannula, the cap having an opening extending therethrough and communicating with the lumen of the collection cannula, the opening in the cap being configured for receiving at least proximal portions of the guide pin.

4. The bone harvesting tool of claim 1, wherein the guide pin includes a plug in proximity to the distal end of the guide pin, the plug being slideably engaged 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 guide pin.

5. The bone harvesting tool of claim 4, wherein the plug is dimensioned relative to the cutting device to limit axial advancement of the guide pin into the cutting device.

6. The bone harvesting tool of claim 1, wherein the cutting device includes a plurality of blades converging towards one another at further positions from the collection cannula.

7. The bone harvesting tool of claim 6, wherein the cutting device include opposite proximal and distal ends, a mounting ring being defined at the proximal end of the cutting device, the mounting ring being threadedly engageable with the distal end of the collection cannula.

8. The bone harvesting tool of claim 1, wherein the collection cannula is formed with a plurality of transverse holes for permitting visual observation of bone tissue collected in the lumen of the collection cannula.