Procedures: Unit 6 Post Exam Test Questions

A patient enters the ED with an elbow injury. The partially flexed AP and lateral positions reveal a possible fracture of the coronoid process. The patients elbow is partially flexed and he refuses to extend it or flex it farther. Which one of the following positions/projections should be performed to confirm the fracture of the coronoid process?

Coyle method with 80 degree flexion, CR angled 45 degrees away from the shoulder

How many projections are required for the AP-acute flexion study of the elbow?

two

A lateral elbow radiograph demonstrates about half of the radial head superimposed by the coronoid process of the ulna. Which of the following occurred?

No positioning errors occurred. *

Proximal radius and ulna are separated, not overlapping

lateral oblique elbow

Humeral epicondyles completely superimposed on each other; three concentric rings

lateral elbow

Proximal forearm and distal humerus directly superimposed on each other

acute flexion

elongated radial head

Trauma Axial Lateromedial Projection (Coyle Method) with 45° angle

elongated coronoid process in profile

Trauma Axial Lateromedial Projection (Coyle Method) with 45° angle away from shoulder

A young child comes to radiology with an elbow injury. The basic elbow projections demonstrate a possible nondisplaced fracture of the coronoid process. Beyond the medial oblique projection, what additional projection(s) can be performed to demonstrate the coronoid process in profile?

Coyle method with 45 degree CR angle away from shoulder

A patient with a fractured forearm had the fracture reduced and a fiberglass cast placed on the extremity. The orthopedic surgeon orders a postreduction study. The original kV setting used was 60 kV. Which one of the following kV factors should be selected for the postreduction study?

63 kV

Which one of the following structures is NOT part of the ulna?

ulnar notch

Which of the following bony structures is found on the distal aspect of the ulna?

head

 A radiograph of an AP projection of the elbow reveals that there is complete separation of the proximal radius and ulna. What positioning error has been committed?

excessive lateral rotation

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

humeral epicondyles

Which of the following structure is considered to be most posterior?

olecranon process

A patient enters the emergency department (ED) with a Smith’s fracture. Which region of the upper limb must be radiographed to demonstrate this injury?

wrist and forearm

With the radial head lateromedial projections, what is the only difference between the four projections?

the position of the hand and/or wrist *

Which of the following actions will lead to the proximal radius crossing over the ulna?

pronation of the hand

Which routine projection of the elbow best demonstrates the radial head and tuberosity free of superimposition with the ulna?

AP oblique with external (lateral) rotation

A radiograph of an AP oblique elbow with medial rotation reveals that the radial head is superimposed over part of the coronoid process. What positioning error has been committed?

excessive medial rotation

Which of the following best demonstrates the radial head using the trauma lateral Coyle method routine?

Elbow flexed 90 degrees, CR angled 45 degrees toward shoulder

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

45 degrees

Which of the following structures is considered to be most lateral?

capitulum

Which of the following structures is considered to be most distal?

styloid processes

What are the names of the two small depressions found on the anterior aspect of the distal humerus?

radial and coronoid fossa

How should the humeral epicondyles be aligned for a lateral projection of the elbow?

perpendicular to the image receptor *

Which basic projection of the elbow best demonstrates the trochlear notch in profile?

lateral

Which routine projection of the elbow will best demonstrate an elevated or visible posterior fat pad?

true lateral with 90 degrees flexion

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

to provide an AP perspective if the patient cannot fully extend the elbow

Which of the following structures is considered to be most proximal?

olecranon process

The smooth, depressed, center portion of the trochlea used for evaluating rotation on a lateral elbow is termed the trochlear:

sulcus

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?

medial (internal) rotation oblique

A ginglymus joint can also be referred to as a _____ joint.

hinge

What two structures form the distal radioulnar joint?

ulnar notch and head of ulna