Final answer:
The client's symptoms are indicative of osteomyelitis, an infection of the bone.
Step-by-step explanation:
The client's symptoms of fever, night sweats, chills, restlessness, and restrictive movement of the fractured leg are indicative of osteomyelitis, which is an infection of the bone. Osteomyelitis can occur as a complication of an open fracture, where bacteria can enter the bone and cause an infection. The symptoms of fever, night sweats, and chills are characteristic of an infection, while the restrictive movement of the fractured leg may be due to pain and swelling associated with the infection.