The document discusses musculoskeletal trauma to the extremities. It describes the primary and secondary surveys for extremity injuries and lists the five major pathophysiologic problems that require management: hemorrhage, fractures and dislocations, sprains and strains, amputations, and compartment syndrome. It indicates the relationship between hemorrhage and open and closed fractures. The primary signs and symptoms of extremity trauma are listed as well as criteria for transporting patients with extremity injuries to a trauma center.