The Acumed Cannulated Screw System consists of screws, washers, and instruments designed to provide fixation for fractures, fusions, and osteotomies of large and small bones. The screws are available in two diameters (6.5 mm and 7.3 mm), in lengths ranging from 30 mm to 150 mm to accommodate various indications and patient anatomy. All screws and washers are made of titanium alloy per ASTM F136. All implants are available non-sterile.
Screws are cannulated in order to be used over a guide wire and each screw is either partially or fully threaded using a cancellous thread form. Cannulation is intended for minimally invasive percutaneous insertion. Partially threaded screws may be used to lag one bone fragment to another, where the far bone fragment is captured by the threads of the screw and pulled toward the near cortex fragment on the head side of the screw. Fully threaded screws are intended to be used to stabilize fractures with little to no compression across the fracture.