blow out fracture

Question 1

causes of orbital trauma

Answer 1

Fist

Elbow common in rugby

Hockey ball

Road traffic accident

Question 2

mechanism of orbital fracture

Answer 2

Backward displacement of eyeball leading to

-> increase in orbital pressure
-> fracture in weakest point of orbital wall

Question 3

how does a hess/ lees look for a blowout fracture

Answer 3

Depending on where along the floor of the orbit the px has had the fracture, the further forward the fracture is the px will have limited elevation.

Question 4

anatomy of orbit

Answer 4

Orbital floor, medial wall an Zygoma prone to fracture in a traumatic event

Lateral wall is stronger and doesn’t seem to fracture easily

Question 5

what is the orbital floor formed by

Answer 5

maxilla
palatine bone

Question 6

what is the infraorbital groove

Answer 6

Transverses floor from lateral to medial

Location of infraorbital nerve which supplies sensation to cheek and ipsilateral upper alveolus and teeth - px with blow out fracture will lose sensation to these