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Diagnostic Imaging
Cervical Trauma
| Question | Answer |
|---|---|
| what are the most common levels to be injuried? | C2 & C6 |
| what is the most common structures to be injured in the cervical spine? | posterior arch |
| what are the measurements of the retropharyngeal and retrotracheal spaces? | retropharyngeal= 7 mm retrotracheal= 20mm |
| what are the measurements of the ADI and what does it mean when it over the measurement? | adults= 3mm and children = 5mm. it means there is a disruption of the transverse ligament. |
| what is the mechanism of injury for a posterior arch fracture? | hyperextension injuries |
| what are the classic findings for a Jefferson fracture? | lateral displacement of the lateral masses(<3mm) |
| what type of trauma that is only in newborns or young children?What are the complication? | Fixed rotary subluxation of the atla. undiagnosis can lead to deformity of the facial structures. |
| Describe the types den's fractures. | type 1- tip of the den fx type 2- m.c fracture at base of the dens due to hyperflexion or hyperextension type 3- fracture through C2 body |
| what structure is fracture on a Hangman's fracture and what is the mechanism of injury? | C2 pedicles. due to hyperextension. |
| An unstable or stable from on the lower cervical spine due to shearing forces usuall on the inferior corner | Teardrop or corner Fx |
| due to axial compression with some degree of flexion.involves the the anterior and middle column and one or more endplates. | Burst fracture |
| how does a burst fracture show on xray | body enlarge in the axial plane widen interpedicular distance paraspinal line displaced retropulsion of posterior fragments |
| what is the mechanism of injury for an unilateral facet dislocation? | flexion with rotation |
| what is the most common level to have a bilateral facet dislocation? | C4-C7 |
| Spinous process fracture at C7 due to avulsion injury or direct blow | Clay Shoveler's |
| what is the radiographic finding for a Clay Shoveler? | double spinous sign on APLC |
| what are the most common sites for the lamina to be fractured? | C5 and C6 |
| what is the most common site for an articular pillar fracture and what is the mechanism of injury? | C6.Mechanism of injury is lateral flexion |
| what are the complications of a lower cervical complication? | neurological damage,vascular injury,non-union fractures,biomechanical changes and DJD |