 A blunt trocar was passed underneath the posterior longitudinal ligament and it was gently released using the #15 scalpel and then Kerrison punches 1-mm and then 2-mm were used to decompress further disk calcified material at the C5-C6 level. 
A blunt trocar was passed underneath the posterior longitudinal ligament and it was gently released using the # 15 scalpel and then Kerrison punches 1 - mm and then 2 - mm were used to decompress further disk calcified material at the C5 - C6 level .