S82.043 Displaced comminuted fracture of unspecified patella

Name of the Condition

• Displaced comminuted fracture of unspecified patella

Summary

This condition involves a fracture of the patella (kneecap) where the bone is broken into multiple pieces and the fragments are displaced from their normal position. The severity depends on the extent of fragmentation and displacement, which can affect knee function and stability.

Causes

Direct trauma to the knee, such as a fall onto the kneecap, a forceful blow, or a high-impact injury from sports or accidents, is the primary cause. Muscle contractions, like a sudden quadriceps pull, can also lead to displaced comminuted fractures.

Risk Factors

• Participation in high-impact or contact sports.
• Osteoporosis or bone-weakening conditions.
• Advanced age, which may reduce bone density.
• Previous knee injuries or surgeries.

Symptoms

• Severe knee pain and swelling.
• Inability to straighten or bear weight on the leg.
• Visible deformity or a gap in the kneecap area.
• Tenderness and bruising around the knee.
• A "popping" sensation at the time of injury.

Diagnosis

Diagnosis typically involves a physical examination to assess knee movement and tenderness. Imaging tests, such as X-rays or CT scans, are used to confirm the fracture, evaluate fragment displacement, and plan treatment.

Treatment Options

• Immobilization with a knee brace or cast to stabilize the fracture.
• Pain management with medications or ice.
• Surgical intervention to realign and fix fragments, if necessary.
• Physical therapy to restore mobility and strength after healing.

Prognosis and Follow-Up

Recovery depends on the severity of the fracture and treatment. Most patients regain knee function with proper care, but stiffness or weakness may persist. Follow-up imaging and physical therapy are often recommended to monitor healing and progress.

Complications

• Nonunion or malunion of the fracture.
• Post-traumatic arthritis in the knee.
• Chronic pain or instability.
• Infection (if surgery is performed).

Lifestyle & Prevention

• Use protective gear during high-risk activities.
• Maintain bone health through diet and exercise.
• Avoid sudden, forceful movements that strain the knee.
• Strengthen quadriceps muscles to support the patella.

When to Seek Professional Help

Seek immediate medical attention if you experience severe knee pain, swelling, or inability to bear weight after an injury. Persistent pain, deformity, or difficulty moving the knee also warrants evaluation.

Tips for Medical Coders

Document the fracture as "displaced comminuted" and specify laterality (right/left) if known. For unspecified cases, use S82.043. Include details on fragment displacement and imaging findings to support code assignment.