Final answer:
A bone must be immobilized for healing. Closed or open reduction sets the bone, after which a cast or surgical fixation prevents movement. Serious fractures may cause life-threatening complications without proper treatment.
Step-by-step explanation:
To facilitate healing, a fractured bone must be immobilized to prevent movement and allow the fusion of fractured parts. After setting the bone, via closed reduction or open reduction, immobility is achieved using casts, braces, or surgical fixation. Immobilization is critical because movement of the fracture site can disrupt the healing process. Moreover, serious fractures like a fractured diaphysis of the femur can lead to life-threatening complications like fat embolism, where fat globules can enter the bloodstream and obstruct the lungs, causing severe respiratory distress and possibly death if not treated promptly.