It appears that upon disengagement of the driver from the screw all seemed well.According to the physician, upon removing the cannula/drill-guide, the screw got sucked into the canal beneath the lamina.The physician had to do an emergent laminectomy at c/3 to remove the screw from the canal.Pt had issues, ct was ordered.All looked good and the patient is slowly improving.No surgentec devices malfunctioned during this procedure.