Diseases of equine orbit Flashcards
1
Q
Common indications for orbital US (3)
A
- Exophthalmos
- Orbital trauma
- Unable to visualize posterior segment
2
Q
Common indications for rads (3)
A
- Exophthalmos
- Orbital/facial trauma
- NLD dz
3
Q
Indications for CT (4)
A
- Eval fractures
- Brain absceses/tumors
- Orbital absceses/tumors
- Sinuses
4
Q
Enophthalmos may accompany or mimic (2)
A
- Microphthalmos
2. Phthisis bulbi
5
Q
If Exopthlamos exam tips: (3)
A
- compare angle of eyelashes
- relative prominance of globe
- Size of palpebral fissure
6
Q
Most common fracture types (3)
A
- dorsal orbital rim
- zygomatic arch
- poll
7
Q
Fractures must be repaired when (3)
A
- displacement of globe
- impingement of globe
- functional restriction of globe
8
Q
Most common orbital tumor
A
SCC
9
Q
Retrobulbar anesthesia
A
- 22 ga 3.5 inch spinal needle
- Bend to curve of orbital wall
- 8cc bupivicaine, 4 cc lidocane, hub of epinephrine
10
Q
Hub of epinephrine
A
what duz this meen?
11
Q
Transpalpebral enuc indications: (2)
A
- Neoplasia
2. Infection
12
Q
Benefit of transconjunctival enuc
A
Less surgical trauma
13
Q
Intraorbital prosthetic common complication
A
50% extrude
-only put in under general anesthesia
14
Q
CT good for detection of what kind of changes?
A
Osseous
15
Q
MRI
- T1
- T2
A
T1: greater spatial resolution and def of normal stuff
T2: better eval of pathologic processes
