Brachial Plexus or Erb’s Palsy and the Long-Term Results of Surgery
The results of a long-term study focusing on the outcome of infants that suffered a brachial plexus injury (bpi) or erbs palsy at birth were published in the January 2007 issue of The Journal of Bone and Joint Surgery.
The study followed up on children that underwent surgery for a bpi (mean of 13.3 years after surgery). The researchers studied 1706 children with brachial plexus injuries sustained at birth that required medical intervention between 1971 and 1997. Of these patients, 124 (7.3%) underwent surgery on the brachial plexus at a mean age of 2.8 months (range, 0.4 to 13.2 months). The most commonly performed surgical procedure was direct neurorrhaphy after neuroma resection.
The researchers found that approximately one-third of the patients, including all nine with a clavicular nonunion from the surgical approach, experienced pain in the affected limb. Additionally, all except for four patients used the hand of the unaffected arm as the dominant hand. Shoulder function was moderate, with a mean Mallet score of 3.0. Both elbow and hand function were good, with a mean score on the Gilbert elbow scale of 3 and a mean Raimondi hand score of 4. Incongruence of the glenohumeral joint was noted in sixteen (16%) of the ninety-nine patients in whom it was assessed, and incongruence of the radiohumeral joint was noted in twenty-one (21%). The extent of the brachial plexus injury was found to be strongly associated with the final shoulder, elbow, and hand function in a multivariate analysis.
Furthermore, a significant number of the patients continued to need help performing activities of daily living and had pain in the affected arm, with the pain due to a clavicular nonunion in one-fourth of the patients.
As a side note, I want to say that although this study appears to be harsh, erb’s palsy can present in wide spectrum of severity. That being said, these results seemed to me, to be preformed on the more severe cases of erb’s palsy. Finally, the most determinant prognostic factor predicting the outcome of children affected by a bpi appears to be the extent of the primary injury.