What are the long term implications of a traumatic femoral artery injury?

Few if repaired well. Depending on the repair used to treat a traumatic femoral artery injury, long term issues are related to the repair itself and its "patency, " or how long it'll stay open before closing off. Any repair to the blood vessels is subject to scar tissue formation or accumulation of plaque that will cause narrowing. Regular follow up with a vascular surgeon is essential to prevent complete blockages.
Depends on repair. If repaired by an experienced surgeon, the injured femoral artery should return to normal function. Long term, scar tissue can form around the repair and cause narrowing and subsequently cause cramping pain in the leg muscles with walking.