Overview
A dislocation occurs when bones in a joint are forced out of their normal position, usually due to sudden trauma. It's among the most common orthopedic emergencies. Shoulder dislocations are most frequent (50% of cases), followed by fingers, elbows, knees, and hips. Dislocations affect over 200,000 people annually in the US, with peaks among:
- Athletes: Contact sports like football account for 50% of cases
- Adults 18-25: Due to sports participation
- Adults over 65: Fall-related dislocations affect 25% of elderly
Symptoms
Symptoms typically appear immediately after injury:
- Visible deformity: Obvious joint misalignment
- Severe pain: Intensifies with movement
- Swelling and bruising: Developing within minutes
- Loss of mobility: Inability to move the joint
- Numbness/tingling: Due to nerve compression
- Muscle spasms: Involuntary tightening around joint
- Weakness: Inability to bear weight
Causes and Risk Factors
Causes:
- Traumatic impact (falls, collisions)
- Twisting with force (e.g., basketball pivot injuries)
- Sudden jerking movements
Risk Factors:
- Sports participation: 60% of shoulder dislocations are sports-related
- Prior dislocations: Risk increases 20x after initial dislocation
- Hypermobility disorders: Ehlers-Danlos syndrome (30x higher risk)
- Age: Teens/young adults face highest rates
- Occupational hazards: Construction workers and manual laborers
(Sources: Journal of Orthopaedic Research, Mayo Clinic)
Diagnosis
Diagnostic process includes:
- Physical exam: Assessment of deformity, circulation, sensation
- X-ray: Confirms dislocation and reveals fractures
- MRI: Evaluates ligament/tendon damage (used in 40% of cases)
- CT scan: For complex joint injuries
- Neurovascular assessment: Checks pulse strength and nerve function
Treatment Options
Immediate Interventions:
- Closed reduction: Realignment without surgery (90% of first-time cases)
- Pain management: NSAIDs or opioids during reduction
Post-Reduction Care:
- Immobilization: Sling (shoulder) or splint (fingers) for 2-6 weeks
- Cryotherapy: 20-min ice sessions hourly initially
- Medications: NSAIDs for pain/swelling
Rehabilitation
- Physical therapy starting 3-6 weeks post-injury
- Progressively challenging strength exercises