A sterile, hand-held, manual surgical instrument designed to remove blood clots and bone debris from the intramedullary canal of a bone (marrow space) in preparation for the insertion of orthopaedic cement. It typically consists of a handle at the proximal end and bristles or fibres at the distal end. The stiff bristles or fibres radiate out around a central shaft which may be flexible or rigid. This is a single-use device.