Obstetric brachial plexus palsy - A prospective, population-based study of incidence, recovery and long-term residual impairment at 10 to 12 years of age.

AIM: To assess the long-term outcome and evaluate prognostic factors in obstetric brachial plexus palsy (OBPP).

METHODS

Of all 114 children with OBPP born in western Sweden in 1999-2001, 98 (61 males, 37 females) were invited to participate. A questionnaire on the symptoms of the OBPP was sent out and those with persisting symptoms were examined in terms of muscle strength, range of motion (ROM), activities of daily living (ADL), pain and sensibility at the age of 10-12 years. Contact was made by 87 children.

RESULTS

The incidence of persisting OBPP at 10-12 years of age was calculated as 19 per 38,749 live births or 0.49 per 1000. Symptoms were reduced muscle strength and ROM in the arm. Eight children reported pain, four had impaired sensibility and ten children described some difficulties in ADL. Muscle strength in forearm supination, shoulder external rotation and elbow flexion at three months of age can be used to predict outcome.

INTERPRETATION: Most children with an OBPP recover completely, but one in five has symptoms of the injury at 10-12 years of age. Muscle strength in the arm at three months of age can be used to predict outcome.