S82.861B Displaced Maisonneuve's fracture of right leg, initial encounter for open fracture type I or II

Name of the Condition

• Displaced Maisonneuve's fracture of right leg, initial encounter for open fracture type I or II

Summary

A displaced Maisonneuve's fracture of the right leg is a specific type of ankle injury involving a proximal fibula fracture combined with a tear of the tibiofibular syndesmosis and often an associated medial malleolus or deltoid ligament injury. This injury typically results from rotational forces applied to the ankle, leading to instability in the ankle joint. The fracture is classified as open (type I or II), indicating a break in the skin with minimal to moderate soft tissue damage.

Causes

The fracture is usually caused by external rotation of the foot, which can occur during activities like twisting the ankle, falls, or sports-related injuries. The rotational force disrupts the syndesmotic ligaments and may cause additional damage to the medial structures of the ankle. Open fractures occur when the broken bone pierces the skin, often due to high-energy trauma.

Risk Factors

• Participation in activities with high rotational stress on the ankle, such as soccer or basketball.
• Previous ankle injuries or ligamentous instability.
• Improper footwear or uneven terrain increasing fall risk.
• High-energy trauma, such as motor vehicle accidents or falls from height.

Symptoms

• Pain and swelling localized to the proximal fibula and ankle.
• Difficulty bearing weight on the affected leg.
• Instability or a feeling of the ankle "giving way."
• Bruising or tenderness along the lower leg.
• Open wound at the fracture site (type I or II open fracture).

Diagnosis

Diagnosis involves a physical examination to assess ankle stability, tenderness, and swelling. Imaging, typically X-rays, is used to identify the proximal fibula fracture and associated injuries. Additional imaging, such as CT or MRI, may be employed for complex cases requiring detailed visualization of soft tissue damage or open fracture classification.

Treatment Options

Treatment depends on the severity of the fracture and soft tissue damage. Options may include surgical fixation to stabilize the fibula and syndesmosis, wound care for open fractures, and immobilization with a cast or brace. Physical therapy is often recommended to restore function and strength.

Prognosis and Follow-Up

Prognosis varies based on the extent of the injury and treatment. Most patients recover with proper management, but some may experience long-term ankle instability or arthritis. Follow-up care typically includes regular monitoring of healing and rehabilitation progress.

Complications

• Infection at the open fracture site.
• Delayed healing or nonunion of the fracture.
• Chronic ankle instability or pain.
• Post-traumatic arthritis.
• Nerve or vascular damage.

Lifestyle & Prevention

• Wear supportive footwear and use ankle braces during high-risk activities.
• Maintain strength and flexibility in the ankle through regular exercise.
• Avoid uneven terrain or hazardous conditions that increase fall risk.
• Seek prompt treatment for ankle injuries to prevent complications.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to bear weight, visible deformity, or an open wound after an injury. Prompt evaluation is critical for open fractures to reduce infection risk.

Tips for Medical Coders

Document the specific location (right leg), displacement status, and open fracture type (I or II) to ensure accurate coding. Include details of associated injuries, such as medial malleolus or deltoid ligament damage, if present. Verify the encounter type (initial) and confirm the fracture is classified as open (type I or II) based on clinical documentation.