Forearm AP Flashcards
What 2 bones make up the forearm? Which is lateral and medial? Know all of the structures of these bones.
Radius and ulna
When performing a long bone radiograph, what must be included on every image?
Both joints, elbow and wrist
What fracture can occur to the radial styloid process due to a blow to the back of the wrist causing the scaphoid to smash into the styloid process?
Chauffeur’s fracture
What part of the distal Humerus articulates with the radial head?
Capitellum
What part of the distal Humerus articulates with the trochlear notch of the ulna?
Humeral trochlea
What part of the distal Humerus articulates with the olecranon process of the ulna? How is the arm positioned when they articulate?
Olecranon fossa, arm is extended
What part of the distal Humerus articulates with the coronoid process of the ulna? How is the arm positioned when they articulate?
Coronoid fossa, arm is flexed
What part of the distal Humerus articulates with the radial head when the arm is flexed?
Capitellum
Where does the radial head articulate with the ulna?
Radial notch
What is the protocol for a forearm exam?
2 views, AP and lateral
How should the humeral epicondyles be positioned in relation to the IR for a properly positioned AP projection?
Parallel to IR
What is the CR location?
Mid forearm, midshaft
How much of IR should there be beyond each joint? Why?
2” of IR beyond them because xrays travel in a straight line till absorbed and the xrays will push the image right off the edge if there isn’t 2” of IR beyond them.
In a properly positioned radiograph, how should the radial head, neck & tuberosity be demonstrated?
Radial head, neck, & tuberosity should be slightly overlapped over proximal ulna
