Elbow Dislocations

Modern Study Review (AI-Generated)

High-Yield Summary

Elbow dislocations are the second most common major joint dislocation in adults, predominantly occurring posteriorly or posterolaterally. Prompt recognition and reduction are critical to restore joint congruity and prevent neurovascular compromise. Modern management emphasizes early motion after stable reduction to optimize functional outcomes and minimize stiffness.

Key Diagnostic Findings

Anatomy

The elbow joint comprises the humeroulnar, humeroradial, and proximal radioulnar articulations.
Stability is provided by bony congruity, the medial (ulnar) collateral ligament (MCL), lateral collateral ligament (LCL) complex, and dynamic muscular support.

Clinical Presentation

Posterior dislocation (80% of cases): Presents with elbow flexed, prominent olecranon posteriorly, and pain with limited motion.
Anterior dislocation: Rare, often associated with high-energy trauma and increased risk of neurovascular injury (brachial artery, median nerve).
Lateral and divergent dislocations: Less common; may indicate complex ligamentous injury and instability.

Imaging

X-rays: AP and lateral views confirm dislocation direction and identify associated fractures (e.g., radial head, coronoid process).
CT scan: Useful for complex or incongruent reductions and fracture characterization.
MRI: Reserved for soft tissue and ligamentous injury assessment in chronic instability.

Classification Systems

Type	Description	Clinical Relevance
Posterior	Most common; ulna displaced posteriorly	Usually stable after reduction
Posterolateral	Ulna and radius displaced posterolaterally	May have LCL complex injury
Anterior	Ulna displaced anteriorly (rare)	High risk of neurovascular injury
Lateral	Ulna displaced laterally	Indicates severe ligamentous disruption
Divergent	Radius and ulna displaced in opposite directions	Highly unstable, often requires surgery

Current Gold Standard Treatment

Non-operative

Indications: Simple posterior dislocations without fractures or instability after reduction.
Management:
Prompt closed reduction under sedation or anesthesia.
Post-reduction neurovascular exam and stability testing.
Immobilization in a posterior splint at 90° flexion for 1–2 weeks.
Early active range of motion (ROM) exercises initiated as soon as tolerated to prevent stiffness.

Operative

Indications:
Associated fractures (radial head, coronoid process) requiring fixation.
Persistent instability after reduction (e.g., LCL or MCL complex disruption).
Open dislocations or neurovascular injury.
Divergent dislocations.
Treatment:
Surgical repair or reconstruction of ligamentous injuries.
Open reduction and internal fixation (ORIF) of fractures.
Early postoperative mobilization protocols to optimize function.

Modern Complications & Outcomes

Complications

Complication	Notes
Stiffness	Most common; minimized by early motion
Chronic instability	Due to untreated ligament injuries
Neurovascular injury	Especially in anterior dislocations
Heterotopic ossification	May limit motion; prophylaxis considered in high-risk cases
Post-traumatic arthritis	Long-term sequelae, especially with fractures

Outcomes

Early reduction and stable fixation lead to excellent functional recovery in most cases.
Residual stiffness is the primary morbidity; aggressive rehabilitation is key.
Neurovascular injuries worsen prognosis and require multidisciplinary management.

Classic Clinical Notes

Elbow Dislocations (Jupiter)

Posterior (80% post./posterolateral):
Closed reduction (CR) with sedation +/- intra-articular local anesthesia.
Test stability post-reduction.
Splint for 1-2 weeks.

Anterior:
Rare; risk of neurovascular injury.

Lateral

Divergent

Last Updated on January 25, 2026 by orthonet