P14.0 Erb's paralysis due to birth injury

Name of the Condition

• Erb's paralysis due to birth injury

Summary

Erb's paralysis due to birth injury is a condition resulting from damage to the brachial plexus during childbirth, typically affecting the upper arm and shoulder. This injury can lead to weakness or loss of movement in the affected limb, often presenting shortly after birth. The condition is associated with traumatic delivery mechanisms and may require specialized evaluation and management.

Causes

The primary cause is birth injury, particularly from excessive lateral traction on the infant's head or neck during delivery. This can stretch or tear the brachial plexus nerves, disrupting nerve function. Risk is higher in deliveries involving shoulder dystocia, breech presentation, or large infants, where forceful maneuvers may be used to facilitate birth.

Risk Factors

• Prolonged or difficult labor
• Shoulder dystocia during delivery
• Breech presentation
• Large infant size (macrosomia)
• Use of forceps or vacuum extraction
• Maternal diabetes or obesity

Symptoms

Symptoms include weakness or paralysis of the shoulder and upper arm, with limited movement of the affected limb. The infant may exhibit a characteristic "waiter's tip" posture, where the arm is internally rotated and held close to the body. Sensory loss or diminished reflexes in the arm may also be present.

Diagnosis

Diagnosis is based on clinical examination of the newborn, focusing on arm movement and reflexes. A thorough birth history, including delivery details, is reviewed to assess for traumatic mechanisms. Electromyography (EMG) or nerve conduction studies may be used to evaluate nerve function, though these are often deferred until the infant is older.

Treatment Options

Treatment may include physical therapy to maintain joint mobility and prevent contractures. Passive range-of-motion exercises are typically initiated early. In severe cases, surgical intervention, such as nerve grafting or tendon transfers, may be considered, usually after a period of observation to allow for spontaneous recovery.

Prognosis and Follow-Up

Prognosis varies depending on the severity of nerve damage. Many infants recover function with therapy, though some may have persistent weakness. Regular follow-up with a pediatric neurologist or orthopedist is recommended to monitor progress and adjust treatment as needed. Long-term outcomes depend on the extent of nerve injury and response to therapy.

Complications

Potential complications include permanent muscle weakness, limited range of motion, or deformities such as shoulder contractures. In rare cases, chronic pain or sensory deficits may develop. Delayed or inadequate treatment can lead to functional impairment in adulthood.

Lifestyle & Prevention

While prevention focuses on careful obstetric management during delivery, parents can support recovery through consistent therapy and monitoring. Avoiding forced positioning of the affected limb and using supportive devices (e.g., splints) as recommended by healthcare providers may aid in healing.

When to Seek Professional Help

Seek immediate medical evaluation if the infant shows signs of arm weakness, abnormal positioning, or reduced movement after birth. Early intervention improves outcomes, so prompt assessment by a pediatric specialist is advised.

Tips for Medical Coders

Document the specific mechanism of injury (e.g., birth trauma) and any associated delivery complications. Ensure the diagnosis is clearly linked to the birth event, with supporting details in the medical record. Code P14.0 is appropriate when Erb's paralysis is directly attributed to birth injury, with no other specified causes.