Method and apparatus for minimally invasive posterolateral spinal fusion

A medical device assembly for delivering bone graft, comprising:

• a delivery shaft, said delivery shaft having a tool insertion end and a graft delivery end, said delivery shaft aligned with a central axis further comprising a curvature, said central axis defining a shaft pathway extending between said tool insertion end and said graft delivery end, said delivery shaft further comprising a handle;
• a first curved element having a first end, a second end, and an exterior surface, said first curved element having a curvature aligned with said curved central axis, said first curved element being axially slidable through said shaft pathway, said first curved element further comprising a pathway extending between said first end and said second end, and defining a hollow form with an interior surface;
• said first curved element further comprising a handle;
• and
• a second curved element having a first end, a second end, and an exterior surface, said second curved element being axially slidable through said first curved element pathway.

A method of placing bony material between adjacent transverse processes, comprising:

• making an incision in the skin on the posterior side of a patient offset from the medial plane and in proximity to a transverse process;
• creating a pathway to a first transverse process through said incision with an assembly;
• extending said pathway to at least a second transverse process adjacent to said first transverse process with said assembly;
• and
• dispensing bony material through said pathway depositing bony material between said first transverse process and said second transverse process.