What is radial head dislocation?
Radial head dislocation occurs when the radial head is displaced from its normal articulation with the ulna and the humerus. The dislocation may be acquired or congenital (see the separate article on congenital radial head dislocation).
What is posterior elbow dislocation?
Posterior elbow dislocation (PED) occurs when the radius and ulna are forcefully driven posteriorly to the humerus. Specifically, the olecranon process of the ulna moves into the olecranon fossa of the humerus and the trochlea of the humerus is displaced over the coronoid process of the ulna.
What movements occur at Radiohumeral joints?
The three joints of the elbow include: Ulnohumeral joint is where movement between the ulna and humerus occurs. Radiohumeral joint is where movement between the radius and humerus occurs. Proximal radioulnar joint is where movement between the radius and ulna occurs.
What is radial subluxation?
Radial head subluxation means that the radius, one of two long bones in the lower arm (forearm), has pulled away from its normal position. The ligament that supports the radial bone then slips into the elbow joint. When this happens, the radial bone can’t move back into its normal place.
Where is my radial head?
The radial head can be palpated with the forearm in full pronation and the elbow flexed to 90 degrees. To palpate, first locate the tip of the lateral epicondyle with your thumb. Then slide your thumb toward the client’s wrist approximately ½ inch. The hard feel is the radial head.
What is an elbow dislocation?
A dislocated elbow occurs when the bones that make up the joint are forced out of alignment — typically when you land on an outstretched hand during a fall. The elbow is the second most commonly dislocated joint after the shoulder in adults, and the most commonly dislocated joint in children.
How do you describe an elbow dislocation?
A dislocated elbow occurs when any of the three bones in the elbow joint become separated or knocked out of their normal positions. Dislocation can be very painful, causing the elbow to become unstable and sometimes unable to move.
What type of joint is Radiohumeral?
Radiohumeral Joint: As the secondary hinge of the elbow, the radiohumeral joint aids in the same flexion and extension movements facilitated by the humeroulnar joint. It extends from the head of the radius to the capitulum of the humerus.
What type of synovial joint is the Radiohumeral joint?
The proximal radioulnar joint is functionally a pivot joint, allowing a rotational movement of the radius on the ulna.
What is elbow joint effusion?
In elbow effusion, the posterior fat pad is displaced dorsally and superiorly by the joint fluid. Thus, bone does not flank the posterior fat pad medially and/or laterally, and it becomes visible on the lateral radiograph (Figure 3). Effusion also displaces the anterior fat pad anteriorly and superiorly.