Nerve surgery in obstetric brachial plexus palsy, report of 68 cases.

BACKGROUND: Obstetric brachial plexus palsy aredue to elongation of the brachial plexus during delivery by increasing thedistance between the head and shoulder. The majority of paralysis recoverspontaneously, but in some cases, nerve repair is necessary. The timing of thisnerve surgery and criteria for its indication are topics of discussion in theworld literature.The aim of this study is to askdirections and to evaluate the contribution of nerve surgery in improving theprognosis of this disease.

METHODS: This is a retrospective study thathas interested 68 cases of obstetric brachial plexus palsy who needs a nerverepair, collected over a 8 year-period (2004 - 2011). We analyzed the musclequotes and evaluate the functions of the shoulder, elbow and hand pre and postoperative. A minimum 12 months'follow-up was observed.

RESULTS: Seventy-eight patients werecollected, 33 boys and 35 girls with a 62 days mean age at first consultationand a mean birth weight of 4187 grams . The presentation was cephalic in 66 cases. Theright side was interested in 66%. Clinically, we reported 50% of total brachialplexus palsy and 50% of C5-C6 palsy.The mean age at time of surgery was 9 months 10 days. Preoperatively, the shoulder was listed 0 or 1 according to Gilbert classification in 70% of cases in the C5-C6 plasy and 90% of the total brachial palsy. After a mean follow up of 30 months, the rate was respectively 9% and 15%. In 75% of cases of total brachial palsy, the hand was listed 0 according to Raimondi scale, while in postoperative, 65% of cases, the hand was listed 2 and 3 according to Raimondi scale. Nerve rupture was the predominant lesion on the C5 and C6 root while fibrosis was predominant on C7, C8 and T1 roots. We noted 6 complications including respiratory distress.

CONCLUSIONS: The nerve repair should not beperformed too early or too late. Too soon, we may operate those who can have aspontaneous recovery. Too late, the installation of the degeneration of motorendplates and muscle atrophy render unnecessary nerve repair. The absence ofbiceps clinical recovery in the 6th month of life and the presence of root-wrenching signs represented the absolute surgical indications. Its results areencouraging and improve functional outcome.