My Dog Bruno, Were It By Hit And Run, On

My dog Bruno, were it by hit and run, on Oct. 31 of this year. His doctor prescribe him Tramadol 50 mg every 12 hours for 14 days. Now he can't walk, I took him to specialist on Monday, and was told that he have fracture pelvic and his spinal cord, is damage. she said that his fracture pelvic will heal, but his spinal cord, need surgery , but not sure he will walk again. does this medicine Tramadol, is the cause for him not walking.. He was walking after the hit and run, I need to know ..Thank you for your truthful answer.