What is double crush syndrome and what are the outcome and treatments available ?

Maybe: injury from a bruise or contusion from pressure between two solid hard bodies

Insult to Injury: Crush Injury to extremity > ischemia > cell death. Release of crushing force > revascularization > cell swelling > ischemia > more cell death. Fasciotomy is limb salvage procedure

Who's On First.: This syndrome, as I understand it, describes the phenomena that when a nerve is damaged in one area, the possibility of that same nerve being damaged in another area is increased. For example, compression of a nerve in the pelvic area may make the development of tarsal tunnel problem more likely. It begs the question as to which area of the nerve do you treat. You need a real specialist to help.