Ulnar entrapment

What Is Ulnar Nerve Entrapment?

Ulnar nerve entrapment is a condition where the ulnar nerve becomes compressed or irritated, typically at the elbow (cubital tunnel syndrome) or wrist (Guyon’s canal syndrome). The ulnar nerve controls sensation in the ring and pinky fingers, and motor function in parts of the hand. Compression can lead to pain, numbness, and weakness.

Causes and Risk Factors

Common causes include:

• Prolonged elbow flexion (e.g., sleeping with bent elbows)
• Leaning on elbows or wrists (e.g., cycling, desk work)
• Repetitive arm or hand movements
• Ganglion cysts near the wrist
• Elbow fractures or dislocations
• Inflammatory conditions (e.g., arthritis)
• Anatomical variations or nerve subluxation

Symptoms of Ulnar Nerve Entrapment

Symptoms vary by location of entrapment:

At the Elbow (Cubital Tunnel Syndrome)

• Tingling or numbness in the ring and pinky fingers
• Weak grip strength
• Pain or aching on the inner elbow
• Muscle wasting in severe cases
• Claw-like deformity of fingers 

At the Wrist (Guyon’s Canal Syndrome)

• Symptoms mostly in the hand
• Pain, weakness, or tingling in the pinky and ring fingers
• Difficulty with fine motor tasks (e.g., typing, playing instruments) 

Diagnosis

Diagnosis may include:

• Physical exam and symptom history
• Electromyography (EMG) and nerve conduction studies (NCS)
• MRI or ultrasound to visualize nerve compression
• Provocation tests (e.g., Tinel’s sign, elbow flexion test)

Treatment Options

1. Conservative Management

• Activity modification (avoid prolonged elbow flexion or pressure)
• Splinting or bracing (especially at night)
• NSAIDs for inflammation
• Physical therapy and nerve gliding exercises
• Corticosteroid injections (in select cases)

2. Surgical Options

• Ulnar nerve decompression
• Transposition surgery (moving the nerve to a less compressed location)
• Guyon’s canal release (for wrist entrapment)
• Surgery is considered if symptoms persist or worsen despite conservative care

Prognosis

• Most cases improve with early treatment
• Delayed treatment may lead to permanent nerve damage or muscle atrophy
• Post-surgical recovery varies but often restores function and relieves pain

Ready to Take the Next Step?

Call us at (561) 433-4444 to schedule a consultation or make an appointment.
Let our experienced doctors help you relieve ulnar nerve entrapment and restore your hand function and comfort.