S43.142 Inferior dislocation of left acromioclavicular joint

Name of the Condition

• Inferior Dislocation of Left Acromioclavicular Joint

Summary

This condition involves the downward displacement of the left acromioclavicular (AC) joint, where the clavicle moves below the acromion of the scapula. It typically results from trauma or injury 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 inferior 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 left 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 intervention may be considered for severe cases or persistent instability.

Prognosis and Follow-Up

Most cases resolve with appropriate treatment, though recovery time varies. Follow-up care may include monitoring for stability and gradual return to activity. Physical therapy is often recommended to restore function.

Complications

• Chronic shoulder instability or recurrent dislocation.
• Nerve or vascular damage in severe cases.
• Long-term pain or reduced mobility if untreated.

Lifestyle & Prevention

• Use protective gear during contact sports.
• Strengthen shoulder muscles through exercise.
• Avoid high-risk activities that may lead to falls or direct shoulder impacts.

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 (left) and the specific type of dislocation (inferior) to ensure accurate coding. Include details about the mechanism of injury and any imaging results to support the diagnosis.