S44.3 Injury of axillary nerve

Name of the Condition

• Injury of axillary nerve

Summary

This condition involves damage or trauma to the axillary nerve, 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 to assess motor and sensory function. Electromyography (EMG) and nerve conduction studies may be used to evaluate nerve integrity. Imaging studies, such as MRI or CT, can help identify structural damage or compression.

Treatment Options

Conservative management may include rest, physical therapy, and pain relief. Surgical intervention may be necessary for severe injuries or nerve entrapment. Rehabilitation focuses on restoring strength and range of motion.

Prognosis and Follow-Up

Prognosis depends on the severity of the injury and timeliness of treatment. Mild injuries often recover with conservative care, while severe injuries may require surgery and prolonged rehabilitation. Follow-up assessments monitor functional recovery and address complications.

Complications

Persistent pain, chronic weakness, or sensory deficits may occur. Nerve damage can lead to muscle atrophy or limited shoulder mobility. Incomplete recovery may result in long-term functional impairment.

Lifestyle & Prevention

Avoid activities that strain the shoulder or increase injury risk. Use proper protective gear during sports. Maintain good posture and ergonomic practices to reduce nerve compression. Strengthen shoulder muscles through targeted exercises.

When to Seek Professional Help

Seek medical attention if symptoms worsen, or if there is sudden loss of sensation or muscle function. Immediate care is needed for severe trauma, open wounds, or signs of infection.

Tips for Medical Coders

Document the mechanism of injury, clinical findings, and any diagnostic tests performed. Specify whether the injury is open or closed, and note any associated fractures or complications. Ensure documentation supports the severity and location of the axillary nerve injury.