Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
What anatomic line lies at the base of the foramen magnum? What is its clinical significance?
|
McRae's line across the base of the foramen magnum
Odontoid should always be below this line (if not, then invagination is present) |
|
What is the most important operative indication for invagination?
Other indications include . . . |
Neurologic compromise
|
|
. . . Migration in excess of?
|
>5 mm
|
|
. . .Cervicomedullary angle (CMA)?
|
>135 degrees
|
|
. . .Ranawat measurement?
|
<13 mm
|
|
. . .McRae's line?
|
Odontoid proximal to McRae's line
|
|
What two surgical options are appropriate for basilar invagination?
|
Occiput to C2 fusion
Transoral odontoid resection |
|
What are the only two classic symptoms of atlantoaxial arthritis? What is the treatment?
|
Headache
Rotational pain Treatment: posterior C1-2 fusion |
|
What are the only two current indications for a transoral approach?
|
Cranial nerve deficits (brainstem compromise)
|