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Obstetric Brachial Plexus Injuries: Evaluation and Management
1Department of Orthopaedic Surgery, Harvard Medical School, Boston.
Insights
Most infants with brachial plexus birth palsy recover fully if function returns within 3 months. Delayed recovery increases the risk of long-term deficits, necessitating potential microsurgery and reconstructive procedures.
Area of Science:
- Pediatric Orthopedics
- Neurology
- Surgical Reconstruction
Background:
- Brachial plexus birth palsy affects infants, with recovery timing crucial for long-term outcomes.
- Delayed recovery beyond 3 months indicates a significant risk of persistent functional limitations.
Purpose of the Study:
- To evaluate prognostic indicators for brachial plexus birth palsy.
- To review the efficacy of microsurgery and secondary reconstructive procedures for improving function.
Main Methods:
- Analysis of recovery timelines and associated long-term functional outcomes.
- Review of microsurgical interventions for unrepaired brachial plexus lesions.
- Assessment of secondary reconstructive surgeries for chronic sequelae.
Main Results:
- Early recovery (within 2 months) predicts normal function.
- Prognosis worsens with delayed recovery (beyond 3-6 months) and specific lesion types (total plexus, C5-C7 loss, Horner's syndrome).
- Microsurgery improves outcomes but may not restore normal function; secondary procedures offer functional gains for chronic cases.
Conclusions:
- Timely intervention is critical for brachial plexus birth palsy.
- Microsurgery and secondary reconstructive procedures can significantly improve function in chronic cases, though complete normalization is not always achieved.
Abstract:
Most infants with brachial plexus birth palsy who show signs of recovery in the first 2 months of life will subsequently have normal function. However, infants who do not recover in the first 3 months of life have a considerable risk of long-term limited strength and range of motion. As the delay in recovery extends from 3 months to beyond 6 months, this risk increases pro-portionately. The presence of a total plexus lesion, a partial plexus lesion with loss at C5-C7, or Horner's syndrome carries a worse prognosis. Microsurgery is indicated for failure of return of function by 3 to 6 months. The exact timing of intervention is still open to debate. With microsurgical reconstruction, there is improvement in outcome in a high percentage of patients. However, the neural lesion is too severe and complex for present methods of reconstruction to restore normal function. Secondary correction of shoulder dysfunction with either latissimus dorsiteres major tendon transfer or humeral derotation osteotomy is clearly beneficial for patients with chronic brachial plexopathy, as is reconstruction of supination forearm contracture with biceps rerouting transfer and/or forearm osteotomy. Reconstruction of the hand is also indicated for the patient with chronic disability. All of these procedures improve, but do not completely normalize, function.