LRA-218 Week 2 Review

Question 1

Where should the CR be directed when performing an AP of the forearm?

Answer 1

Midforearm

Question 2

What two bony landmarks are palpated for positioning of the elbow?

Answer 2

Humeral epicondyles

Question 3

How much rotation of the humeral epicondyles is required for the AP medial oblique projection of the elbow?

Answer 3

45 degree

Question 4

A nonvisible posterior fat pad on a well-exposed, correctly positioned lateral elbow radiograph generally suggests:

Answer 4

• Negative study for entry (of fracture)
• no fracture present

Question 5

A radiograph of the elbow demonstrates the radius directly superimposed over the ulna and the coronoid process in profile. Which projection of the elbow has been performed?

Answer 5

Medial oblique

Question 6

A patient with a fractured forearm had the fracture reduced and a fiberglass cast placed on the extremity. The orthopedic surgeon orders a postreduction (put it in a cast) study. The original kV was 60 kV. What change in kV is needed?

Answer 6

63 or 64

Question 7

What is the purpose of performing the AP partially flexed projections of the elbow?

Answer 7

perspective if a patient cannot fully extended elbow

Question 8

Which routine projection of the elbow best demonstrates the olecranon process in profile?

Answer 8

Lateral

Question 9

How should you instruct the patient when doing an AP Forearm

Answer 9

• instruct the patient to drop shoulder to place the entire limb on same horizontal plane
• instruct the patient to lean laterally as necessary to place entire wrist, forearm, and elbow in as near a true frontal position as possible

Question 10

What should you make sure of when positioning a patient on an AP Elbow?

Answer 10

• align and center the forearm to long axis of IR, ensuring that both wrist and elbow joints are included
• CR to midforearm

Question 11

what hand movement/position should be placed when doing an AP elbow?

Answer 11

hand must be supinated