I can't say I know much about it...but I do know a therapist that worked a the Mayo clinic and I know they specialized in this type of surgery. Here is a link to their website with some basic info on brachial plexus injury and surgical options. There are some
specific references on the site that you could look into as well
for more journal based information....


Brachial plexus injury - MayoClinic.com

good luck...