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Obstetric brachial plexus palsy--risk factors and predictors
Marcin Sibiński1, Marek Synder
1Klinika Ortopedii i Ortopedii Dzieciecej Uniwersytetu Medycznego, Łodź. sibinek@poczta.onet.pl
Ortopedia, Traumatologia, Rehabilitacja
|January 30, 2008
Summary
High birth weight, shoulder dystocia, and forceps delivery are key risk factors for obstetric brachial plexus palsy. While C-sections reduce risk, severe injuries predict poor recovery, with Narakas classification aiding outcome prediction.
Area of Science:
- Obstetrics and Gynecology
- Pediatric Neurology
- Clinical Medicine
Background:
- Obstetric brachial plexus palsy (OBPP) affects approximately 1 in 1000 live births.
- Often caused by delivery-related traction, direct nerve injury isn't always evident.
- Understanding OBPP risk factors and recovery is crucial for affected infants.
Purpose of the Study:
- To identify significant risk factors for obstetric brachial plexus palsy.
- To correlate injury severity with the likelihood of functional recovery.
- To validate the predictive value of the Narakas classification system.
Main Methods:
- Utilized two prospective databases for patient information and clinical assessments.
- Analyzed data from 162 children regarding pregnancy, labor, injury severity, and procedures.
- Included clinical limb assessments for 76 patients, with a mean follow-up of 6 years and 9 months.
Main Results:
- Identified high birth weight, shoulder dystocia, forceps delivery, and clavicle fracture as key OBPP risk factors.
- Found breech delivery not to be associated with increased nerve injury incidence.
- Cesarean delivery reduced OBPP risk, but did not eliminate it; Narakas group 1 showed early biceps recovery.
Conclusions:
- Narakas classification is a strong predictor of functional recovery in obstetric brachial plexus palsy.
- Most children achieve complete limb recovery, but severe injuries (Narakas groups III-IV) have poor prognoses.
- Early biceps function recovery by 4 months suggests a favorable outcome in milder OBPP cases.
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