Anterior Shoulder Dislocation Management

Diagnostic Approach

Radiography must be obtained before attempting reduction to confirm the dislocation and identify associated fractures, according to the American College of Radiology 1
Required views for initial imaging include anteroposterior (AP) in internal and external rotation PLUS an axillary or scapula-Y view, as recommended by the American College of Radiology 1
AP views alone miss posterior dislocations in over 60% of cases; the axillary or scapula-Y view is mandatory to avoid misclassification, as stated by the American College of Radiology 1
Associated fractures to identify include Hill-Sachs deformity and bony Bankart lesion, according to the American College of Radiology 1

Mandatory post-reduction radiographs are necessary to confirm successful reduction and evaluate for fractures that may have been obscured by the dislocation, as recommended by the American College of Radiology 1, 2
Neurovascular assessment is critical following reduction, particularly evaluating axillary nerve function and vascular integrity, according to the American College of Radiology 1, 2

For young patients, consider MR arthrography or non-contrast MRI to evaluate for labral tears, capsular injuries, and bone loss that predict recurrence, as recommended by the American College of Radiology 3, 2, 4
CT angiography is recommended if vascular compromise is suspected, especially with associated proximal humeral fractures, according to the American College of Radiology 1, 2

Reduction should be performed promptly as delays increase the risk of neurovascular complications, as stated by the American College of Emergency Physicians 1
Procedural sedation options include Propofol or etomidate with opioid analgesia, which are effective for shoulder reduction, according to the American College of Emergency Physicians 5

Neurovascular injury, including axillary nerve injury and axillary artery injury, can occur, especially with proximal humeral fractures, as reported by the American College of Radiology 1, 2
Rotator cuff tears can occur, particularly in older patients or those with traumatic mechanisms, according to the American College of Radiology 2
Progressive glenoid bone loss can occur in up to 10% of patients with recurrent instability, requiring specialized surgical procedures, as stated by the American College of Radiology 4

Never attempt reduction without radiographic confirmation, as this could worsen fracture-dislocations, according to the American College of Radiology 1
Do not rely on AP views alone, as failure to obtain axillary or scapula-Y views leads to missed diagnoses, as reported by the American College of Radiology 1
Do not overlook associated rotator cuff tears, especially in patients over 40 years or with high-energy trauma, according to the American College of Radiology 2
Do not delay reduction, as this increases neurovascular complications, as stated by the American College of Radiology 1

The American College of Radiology recommends that elderly patients (>60 years) with shoulder dislocation are significantly more likely to have rotator cuff tears compared to younger patients, with a higher likelihood of weakness in external rotation, abduction, or internal rotation 6
The American College of Radiology suggests that younger patients (<35 years) are more likely to have labroligamentous injury and persistent instability after dislocation, with a higher risk of recurrent instability requiring evaluation for capsular injuries and bone loss 6

The American College of Radiology recommends that pre-reduction imaging should include anteroposterior (AP) views in internal and external rotation, plus axillary or scapula-Y view, to confirm dislocation direction and identify associated fractures (Hill-Sachs deformity, bony Bankart lesion) before manipulation 7
The American College of Radiology suggests that MR arthrography is the gold standard for evaluating labral tears, capsular injuries, and rotator cuff pathology in subacute or recurrent instability, with an appropriateness rating of 9/9 6