Menu Close

What does posterior dislocation mean?

What does posterior dislocation mean?

Definition/Description 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.

How do you treat a dislocated shoulder posterior?

Abstract

  1. Posterior dislocations are rare and diagnostically difficult injuries.
  2. Treatment options include conservative methods and surgical anatomic reconstruction options as well as non-anatomic surgical procedures such as subscapularis tendon transfer, hemiarthroplasty and total shoulder arthroplasty.

Why are posterior shoulder dislocations rare?

Posterior shoulder dislocations are rare compared to anterior shoulder dislocations and occur most commonly from an axial load while the arm is internally rotated and in the adducted position.

What causes posterior dislocation?

Posterior dislocations are caused by severe internal rotation and adduction. This type of dislocation usually occurs during a seizure, a fall on an outstretched arm, or electrocution. Occasionally, a severe direct blow may cause a posterior dislocation.

Which is worse anterior or posterior shoulder dislocation?

Posttraumatic Degenerative joint disease Posttraumatic degeneration of the glenohumeral joint is relatively uncommon after posterior dislocation, but when it occurs the severity of the arthrosis is usually worse than that following anterior dislocation.

What is the mechanism of injury for a posterior shoulder dislocation?

The classic mechanisms of posterior dislocation involve tonic-clonic seizures, electrical shock, or anterior-directed shoulder trauma (such as a grabbing the dashboard in a motor vehicle collision or falling on an outstretched hand).

How common is posterior shoulder dislocation?

The glenohumeral joint of the shoulder is the most commonly dislocated joint in the body and accounts for approximately 50% of all major dislocations seen in the emergency department. Posterior shoulder dislocations account for about 2% to 5% of all shoulder dislocations.

Why is an anterior shoulder dislocation more common than a posterior shoulder dislocation?

An anterior dislocation accounts for 97% of recurrent or first time dislocations. It is the most common dislocation and is caused by the arm being positioned in an excessive amount of abduction and external rotation. As a result of its inherent weakness, the humeral head is more prone to dislocate at this interval.

When does posterior dislocation of the shoulder occur?

Posterior Dislocation of Shoulder: This is a rare pathological condition of the shoulders in which the shoulder gets dislocated posteriorly. Anterior dislocation of the shoulder is quite common but posterior dislocation of the shoulder is pretty rare and usually occurs after a trauma or an epileptic shock.

What is the term for posterior hip dislocation?

In approximately 90% of patients with a hip dislocation, the thigh bone is pushed out of the socket in a backward direction. This is called a posterior dislocation. What causes a posterior hip dislocation?

What is the definition of posterior elbow dislocation?

Definition/Description Posterior elbowdislocation (PED) occurs when the radiusand ulnaare 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 are the risks of posterior knee dislocation?

Complications of Posterior Knee Dislocation. Posterior knee dislocation is the most common type of knee dislocation associated with vascular injury. Interruption of the blood supply to the leg may lead to acute ischemia, gangrene, and amputation.