Lateral Elbow - Image Analysis

Question 1

Which fat pad should be seen on all lateral elbows?

Answer 1

anterior fat pad

Question 2

A change in the shape or placement of the anterior fat pad may indicate ___ or ___ ?

Answer 2

joint effusion + elbow injury

Question 3

Which fat pad is normally obscured b/c of its location in the olecranon fossa

Answer 3

posterior fat pad

Question 4

Explain what happens to the posterior fat pad when injury occurs

Answer 4

joint effusion pushes this pad out of the fossa to be located proximal + posterior to the olecranon fossa

Question 5

Which fat pad is parallel to the anterior aspect of the proximal radius? displacement of this fat pad happens w/fractures of the radial head/neck

Answer 5

supinator fat stripe

Question 6

T of F: if the elbow is not adequately flexed, these fat pads can be displaced by poor positioning

Answer 6

true

Question 7

What are the three concentric circles seen in a lateral elbow?

Answer 7

capitulum, trochlear sulcus, medial trochlea

Question 8

What is the trochlear sulcus?

Answer 8

small centre arc + works like a pivoting point b/capitulum and medial trochlea

Question 9

Proximal humerus positioning determines the alignment of?

Answer 9

the capitulum + medial trochlea &

the radial head + coronoid process

Question 10

Depression or elevation of the proximal humerus moves radial head ____ or ____ on the coronoid process

Answer 10

anteriorly or posteriorly

Question 11

Depression or elevation of the distal forearm shifts the radial head ____ or ____ to the coronoid process

Answer 11

distally or proximally

Question 12

When the proximal humerus is elevated, the radial head is too far ____ on the coronoid process, and the distal capitulum is too far ____ to the medial trochlea

Answer 12

posteriorly, distal

Question 13

When the proximal humerus is lower than the distal humerus, the radial head is too far ____ on the coronoid process and the capitulum is too far ____ to the medial trochlea

Answer 13

anteriorly, proximal

Question 14

When the distal forearm is too low, the radial head is ____ to the coronoid process and the capitulum is too far ____ to the medial trochlea

Answer 14

distal, anterior

Question 15

When the distal forearm is too high, the radial head is ____ to the coronoid process and the capitulum is too far ____ to the medial trochlea

Answer 15

proximal, posterior

Question 16

T or F: visibility of the radial tuberosity is determined by the position of the wrist + hand

Answer 16

True

Question 17

Where should the radial tuberosity be situated in a correct lateral elbow?

Answer 17

on the medial aspect of the radius

Question 18

When the wrist and hand are supinated, the radial tuberosity is demo’d in profile ____

Answer 18

anteriorly

Question 19

When the wrist and hand are pronated, the radial tuberosity is demo’d in profile ____

Answer 19

posteriorly

Question 20

What would the purpose be for lateral elbow exams with different hand/wrist positions?

Answer 20

To study radial head/neck fractures

Question 21

Where is the elbow joint located?

Answer 21

0.75” or 2 cm distal to the lateral epicondyle