Forearm Lateral Flashcards
What does it signify when the posterior fat pad is seen out of the fossa?
Joint effusion pushes the pad out of the fossa, seeing it proximally and posterior to the fossa.
What identifies a subtle radial fracture?
Bowing or obliteration of the pronator fat stripe.
Other than joint effusion when will you see the posterior fat pad?
Non pathological displacement of the anterior and posterior fat stripe due to intra articular pressure when the elbow is extended.
What happens to the tuberosity in a lateral position? Wrist Internally rotated by 40 degrees?
Tube is situated on the medial aspect of the radius and superimposed by it, not in profile.
Tube seen posteriorly.
What is the ideal position of the radius head and the coronoid process in a lateral position?
The anterior aspects of the head and process are aligned.
What happens if the proximal humerus is elevated?
Radial head shifts posterior to the coronoid process showing increased superimposition.
What happens if the proximal humerus is depressed?
Radial head is positioned anterior to the coronoid process.
Which joint is open on a lateral forearm projection?
Elbow joint because the diverging Rays will be parallel with the slant of the humeral epicondyles and the elbow joint space.
What is the effect of the muscular or thick forearm?
The forearm balances on the medial ulna. Having a thick proximal forearm the radial head will be projected into the elbow joint space.
Name the fat pads and stripes and their location.
Pronator fat stripe anterior to the distal radius, scaphoid fat stripe lateral to the scaphoid, anterior fat pad anterior to the distal humerus, posterior fat pad in the olecranon fossa and supination fat stripe anterior to the proximal radius.
