S44.31 Injury of axillary nerve, right arm

Name of the Condition

• Injury of axillary nerve, right arm

Summary

This condition involves damage or trauma to the axillary nerve in the right arm, which may impair motor function, sensation, or cause pain in the affected area. The axillary nerve is a peripheral nerve that innervates the deltoid muscle and provides sensation to the lateral shoulder. The extent of symptoms depends on the severity and location of the injury.

Causes

Direct trauma, such as falls, vehicle collisions, or sports injuries, can damage the axillary nerve. Compression from prolonged pressure, surgical procedures, or repetitive movements may also lead to nerve injury. Penetrating wounds or fractures in the shoulder region can disrupt nerve function.

Risk Factors

• Participation in high-impact sports or activities with a risk of shoulder trauma.
• Occupations involving heavy lifting, repetitive motions, or exposure to compression.
• Previous injuries or surgeries in the shoulder area.
• Conditions that increase susceptibility to nerve damage, such as diabetes or peripheral neuropathy.

Symptoms

• Pain, burning, or tingling in the shoulder or upper arm.
• Numbness or loss of sensation in the lateral shoulder.
• Muscle weakness or paralysis affecting the deltoid muscle, leading to difficulty lifting the arm.
• Atrophy of the deltoid muscle over time.

Diagnosis

Clinical evaluation and physical examination are typically used to assess symptoms and functional impairment. Imaging studies, such as MRI or ultrasound, may be ordered to visualize nerve damage or associated injuries. Nerve conduction studies or electromyography (EMG) can help confirm the diagnosis and assess the extent of nerve injury.

Treatment Options

Treatment may include rest, immobilization, and physical therapy to restore function. Pain management with medications or nerve blocks may be necessary. Severe cases might require surgical intervention to repair or decompress the nerve. Rehabilitation focuses on strengthening the deltoid muscle and improving range of motion.

Prognosis and Follow-Up

Prognosis depends on the severity of the injury and timely treatment. Mild injuries often recover with conservative management, while severe injuries may have lasting effects. Follow-up appointments monitor recovery progress, adjust treatment plans, and address any persistent symptoms or complications.

Complications

Potential complications include chronic pain, permanent muscle weakness or atrophy, and reduced shoulder function. Nerve damage may lead to sensory deficits or ongoing discomfort. In some cases, surgery may be needed to address complications like nerve entrapment or scar tissue formation.

Lifestyle & Prevention

Avoid activities that strain the shoulder or put it at risk of injury. Use proper techniques during sports or heavy lifting. Maintain good posture and take breaks during repetitive tasks. Protective gear, such as shoulder pads, can reduce injury risk in high-impact activities.

When to Seek Professional Help

Seek medical attention if you experience sudden or severe shoulder pain, weakness, or numbness after an injury. Persistent symptoms, difficulty moving the arm, or signs of infection (e.g., redness, swelling) also warrant evaluation. Early intervention improves outcomes.

Tips for Medical Coders

Document the specific location (right arm) and any associated details, such as the encounter type or severity, to ensure accurate coding. Verify that the injury is clearly attributed to the axillary nerve and not another structure. Include clinical notes supporting the diagnosis and treatment provided.