Vertebral Column Injury (specific injuries)



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Wachenheim's line - drawn down posterior surface of clivus and its inferior extension should barely touch posterior aspect of odontoid tip;







  1. Powers ratio > 1 (anterior subluxation)

Powers ratio = BC/OA

BC - distance from basion to midvertical portion of posterior laminar line of atlas;



OA - distance from opisthion to midvertical portion of posterior surface of anterior ring of atlas.



  1. Prevertebral soft tissue swelling (70% patients)


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