Oct 16, 2024 · Posterior shoulder dislocations account for only 2-4% of all shoulder dislocations (the vast majority are anterior) 1,3. Typically the humeral head is forced posteriorly in internal rotation while the arm is abducted 1,3. In adults, convulsive …

Jan 26, 2025 · Posterior shoulder instability and dislocations are less common than anterior shoulder instability and dislocations, but are much more commonly missed. Diagnosis is made radiographically in the setting of acute dislocations.

Sep 12, 2022 · Posterior shoulder dislocations are relatively rare, accounting for about 2% to 5% of all shoulder dislocations. They occur when the head of the humerus is displaced backward, usually due to forceful adduction combined with internal rotation or from a blunt blow to the anterior shoulder.

Jul 6, 2023 · In traumatic posterior dislocations, the injury is almost always due to a fall onto an outstretched, internally rotated arm. The force of the impact pushes the head of the humerus posteriorly out of the glenoid cavity.

Dec 21, 2022 · Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited...

Posterior Shoulder Dislocation (PSD) Posterior dislocation is less common as it accounts for 3% of shoulder dislocations. Typically the humeral head is forced posteriorly in internal rotation while the arm is abducted.

Jul 21, 2024 · Posterior dislocations can be difficult to identify on an AP view only (as may be obtained in the setting of a secondary survey of a trauma), as the humeral head moves directly posteriorly and congruency may appear to be maintained (at least at first glance).

Consider CT for occult dislocations of evaluation of fractures; Bedside ultrasound can be used to assess for both dislocation and successful reduction; Management Closed reduction. Most require procedural sedation. Adduct the arm; Apply traction along long axis of humerus; Have assistant push humeral head anteriorly into glenoid fossa; Apply ...

Dislocations of the shoulder occur when the head of the humerus is forcibly removed from its socket in the glenoid fossa. The most common cause for posterior dislocations is anterior trauma to the shoulder such as blunt force.

Dec 25, 2024 · Posterior shoulder dislocations can occur in the context of seizures, often resulting from forceful muscle contractions during a convulsive episode. The mechanism involves a forceful, often indirect, impact to the shoulder. Similarly, high-voltage electrical injuries can cause violent muscle spasms leading to posterior dislocation.