Sauerland: Pre-lab

Question 1

Where is the middle meningeal artery most susceptible to damage?

Answer 1

at the pterion, where 4 bones meet: temporal, parietal, sphenoid, zygomatic

Question 2

Fractures of the inferior wall of the orbit may involve what?

Answer 2

the maxillary sinus **hemorrhage into maxillary sinus or displacement of orbital structures into the maxillary sinus can cause airway obstruction, infection, or displacement of maxillary teeth

Question 3

Increased intraocular pressure (greater than 20-22mm)

Answer 3

glaucoma

Question 4

What are two forms of glaucoma? Which is more dangerous, causes severe pain, and loss of vision?

Answer 4

angle-closure (narrow angle) **

open-angle

Question 5

What’s this?

Rare; pigment deposited from iris clogs the draining angles and prevents aqueous humor from leaving the eye.

Answer 5

pigmentary glaucoma

Question 6

What’s this?

slow drainage; hereditary; frequent if diabetes

Answer 6

open-angle glaucoma

Question 7

What’s this?

avoid dilatation; severe pain; loss of vision

Answer 7

narrow angle glaucoma

Question 8

Most common cause of blindness. At age of 80, about 10% of the population is affected.

Answer 8

glaucoma

Question 9

What’s the clinical importance of the subarachnoid space surrounding the optic nerve?

Answer 9

CSF under pressure in subarachnoid space surrounding the optic nerve – compression of central retinal vein – engorged retinal veins – hyperemic and swollen optic disc (edema) – retinal hemorrhages around the disc

Question 10

Edema of the optic disc (choked disc)
Optic disc swelling is caused by increased intracranial
pressure; therefore, it is usually bilateral

Answer 10

papilledema