Bone harvesting

Inventors

Budyansky, Maxim • Shah, Neil • Khanna, Akhil Jay • Kebaish, Khaled M. • Riley, III, Lee Hunter

Assignees

Johns Hopkins University

Abstract

Methods and devices for harvesting cancellous bone are disclosed. The bone-harvesting device may include a cannula and a bone receptacle in communication with the cannula, wherein the cannula including a cutting surface positioned at or adjacent the distal end, the cutting surface being oriented at an angle, the angle being greater than 90 degrees relative to the longitudinal axis of the cannula, and the harvested bone is adapted to move from a position adjacent to the cutting surface through the cannula into the bone receptacle. The cutting surface of the cannula may be positioned at or adjacent the distal end, and positioned at least in part radially outward of the outer face of the cannula. The cannula may include a cutting surface positioned at or adjacent the distal end and an occluding geometry that partially occludes the distal end of the cannula adjacent the cutting surface. In addition, a suction port may be provided in communication with the bone receptacle.

Core Innovation

The invention relates to a bone harvesting device for harvesting cancellous bone that includes a hollow cannula and a bone receptacle coupled to a proximal end of the hollow cannula. The bone receptacle has an opening in a proximal end that opens to an interior of the bone receptacle, such that applying a suction force to the interior of the bone receptacle draws harvested bone into the interior through the hollow cannula.

The bone receptacle includes a removable plunger removably received in the interior of the bone receptacle, where the removable plunger includes a distal plate, a proximal plate, and a first longitudinally-extending wall section extending between the distal plate and the proximal plate to establish a bone containment region. The bone containment region includes a closed first side provided by the first longitudinally-extending wall section and an open second side that allows removal of harvested bone from the bone containment region.

The removable plunger further includes a second longitudinally-extending wall section that extends in a proximal direction away from the proximal plate outside the bone containment region. A cap removably secured to the bone receptacle over the opening in the proximal end enables the removable plunger to be positionable entirely within the bone receptacle when the cap is secured.

Additional disclosed variants describe a suction port connected to the bone receptacle, and an optional filter positioned inside the bone receptacle to block harvested bone parts from passing through the suction port. Other structural refinements include a cannula with a distal cutting surface and a curved distal portion through an arc greater than 90°, with an angular extent range relative to a longitudinal axis, and configurations including an occluding member that partially occludes the distal end.

Claims Coverage

The independent claim coverage centers on three inventive features: suction-based collection into a receptacle, a removable plunger that defines a bone containment region for collecting and removing harvested bone, and a cap that permits the plunger to be fully received within the receptacle when secured.

The inventive coverage includes suction-driven drawing of harvested bone through a hollow cannula into a bone receptacle, collection using a removable plunger that defines a bone containment region for collecting and removing harvested bone, and a cap that secures the receptacle such that the plunger is fully positionable within the receptacle. Additional refinements include suction-port connectivity, optional internal filtering, variable interior passage geometry, and constrained distal cannula geometry including an occluding feature at a distal opening.

Stated Advantages

Documented Applications