Hello @12165008021954. I am so sorry your husband has been going through this. I don't know if it is of any interest or not at this stage, however, I did find information that I wanted to share: https://newsnetwork.mayoclinic.org/discussion/mayo-clinic-minute-surgical-options-to-treat-brachial-plexus-injuries/

Have you been offered any surgical options in the last 8 years? What treatments has he tried?