S43.151 Posterior dislocation of right acromioclavicular joint

Name of the Condition

• Posterior Dislocation of Right Acromioclavicular Joint

Summary

This condition involves the complete displacement of the right acromioclavicular (AC) joint, where the clavicle moves backward relative to the acromion of the scapula. It typically results from trauma and may cause pain, instability, or restricted movement in the shoulder.

Causes

Traumatic events like falls, direct blows to the shoulder, or forceful movements can cause posterior dislocation. Sports injuries, motor vehicle accidents, or falls are common triggers.

Risk Factors

• Participation in contact sports or activities with high fall risk.
• Previous shoulder injuries or ligamentous instability.
• Age-related degeneration or connective tissue disorders.
• Occupations requiring repetitive arm or shoulder movements.

Symptoms

• Pain and tenderness around the top of the shoulder.
• Visible deformity or swelling over the acromioclavicular joint.
• Limited range of motion in the shoulder.
• Sensation of the joint "popping out" or feeling unstable.

Diagnosis

Diagnosis typically involves a physical examination to assess tenderness, deformity, and range of motion. Imaging tests like X-rays may be used to confirm displacement and rule out fractures.

Treatment Options

• Non-surgical treatments such as rest, ice, and physical therapy to restore movement and strength.
• Surgical options in severe cases to realign the joint and stabilize it.

Prognosis and Follow-Up

Prognosis depends on the severity of the injury and treatment. Most patients recover with appropriate care, but follow-up may be needed to monitor for complications or recurrence.

Complications

• Chronic shoulder instability.
• Nerve or vascular damage.
• Post-traumatic arthritis.
• Persistent pain or deformity.

Lifestyle & Prevention

• Avoid high-risk activities or use protective gear.
• Strengthen shoulder muscles through exercise.
• Maintain proper posture and body mechanics.
• Seek prompt treatment for shoulder injuries.

When to Seek Professional Help

Seek medical attention if you experience severe pain, visible deformity, or inability to move the shoulder after an injury.

Tips for Medical Coders

Document the laterality (right) and type of dislocation (posterior) to ensure accurate coding. Include clinical details supporting the diagnosis, such as imaging findings or physical exam results.