Orbital Fracture

Question 1

What portion of what bone is typically broken in orbital fracture?

Answer 1

Orbital floor

-Posterior medial portion of the maxillary bone

Question 2

What nerve is most commonly damaged in orbital fracture?

Answer 2

Infraorbital nerve, a branch of V2

Question 3

What is the weakest bone in the orbit?

Answer 3

Maxillary bone

Question 4

What bones make up the floor of the orbit?

Answer 4

Maxillary bone - orbital plate
Zygomatic bone - orbital plate
Palatine bone - orbital process

Question 5

What are the typical symptoms of a blow out fracture?

Answer 5

Pain
Diplopia
Crepitus on palpation/nose blowing

Question 6

What are the typical signs of a blow out fracture?

Answer 6

Sub conj heme
Enophthalmos
Infraorbital hypoesthesia
Hyphema
Angle recession

Question 7

Which muscles are most commonly trapped in an orbital fracture?

Answer 7

Inferior rectus

Inferior oblique

Question 8

Will persons with a trapped inferior rectus experience vertical or horizontal diplopia, worse on what gaze?

Answer 8

Vertical

Upgaze

Question 9

With an orbital fracture, why should patients be instructed not to blow their nose for 48 hours?

Answer 9

Limit risk of orbital infection

Question 10

When can gonio or scleral depression be safely done on patients with an orbital fracture?

Answer 10

4 weeks post trauma