Elbow Comp

Question 1

What does the internal oblique elbow best demonstrate?

Answer 1

The coronoid process and trochlea

Question 2

What does the external oblique elbow best demonstrate?

Answer 2

The radial head, neck, and capitulum of humerus

Question 3

Which epicondyle is larger?

Answer 3

Medial

Question 4

Elbow joint classification?

Answer 4

• ginglymus/hinge
• flexion/extension
• humerus and ulna = hinge
• humerus and radius = hinge

Question 5

Proximal radioulnar joint classification

Answer 5

Trochoidal/pivot

Question 6

Why should the forearm not be radiographed in a PA position?

Answer 6

The radius is crossed over the ulna

Question 7

Fat pads of the elbow

Answer 7

Anterior
Posterior
Supinator

Question 8

Location of anterior fat pad

Answer 8

Teardrop shaped, anterior to distal humerus

Question 9

What make up the anterior fat pad?

Answer 9

Superimposed coronoid and radial pads

Question 10

Posterior fat pad location?

Answer 10

Deep within olecranon fossa

Question 11

If elbow is flexed beyond 90 degrees what happens to the posterior fat pad?

Answer 11

The olecranon foes into the fossa and causes it to appear

Question 12

Which fat pad is more reliable?

Answer 12

Posterior

Question 13

Which fat pad is routinely visualized on a lateral elbow?

Answer 13

Anterior

Question 14

Location of supinator fat pad?

Answer 14

Anterior to proximal radius

Question 15

What does the supinator fat pad indicate?

Answer 15

Radial head, neck fractures

Question 16

What is osteopetrosis?

Answer 16

Hereditary abnormally dense bone, no differentiation between bony cortex and trabeculae
Increase technique

Question 17

What should you do if a pt can’t extend elbow more the 90 degrees for an AP?

Answer 17

Take 2 APs, angle 10-15 degrees into the joint

Question 18

What should you do it the patients elbow is flexed more than 90 degrees for an AP?

Answer 18

Jone’s method

Question 19

Acute flexion projections?

Answer 19

• 2 projections, one CR @ humerus, 1 CR @ forearm
• CR midway between epicondyles for distal humerus
• CR 2” superior to olecranon process for proximal forearm

Question 20

Another name for trauma axial laterals?

Answer 20

Coyle method

Question 21

What do we perform trauma axial laterals for?

Answer 21

Trauma to area of radial head of coronoid process, useful when patient can’t fully extend for obliques

Question 22

Which way do we angle for the trauma axial lateral for the radial head?

Answer 22

Toward the shoulder

Question 23

Which way do we angle for the trauma axial lateral for the coronoid process?

Answer 23

Away from the shoulder

Question 24

Radial tuberosity location on radial head laterals?

Answer 24

Hand position:
Supine (max external): slightly anterior
Lateral: over radial shaft
Prone: slightly posterior
Max internal: posterior

Question 25

When is the joint open on flexed AP and oblique elbows?

Answer 25

When the forearm is placed parallel to IR

Question 26

What 3 things need to be aligned for a lateral elbow?

Answer 26

Medial trochlea, capitulum, trochlear sulcus