Final answer:
A serpentine splint is used to immobilize and support a fractured bone, ensuring proper alignment during healing to prevent the bone from healing in a deformed position.
Step-by-step explanation:
The purpose of a serpentine splint is to immobilize and support a fractured bone. When there is a fracture, it's crucial to prevent the surrounding muscles from causing improper alignment during the healing process. The interosseous membranes in the leg and forearm, which provide areas for muscle attachment, can contribute to misalignment if damaged in association with bone fractures. Therefore, immobilization using splints or casts can help maintain alignment and facilitate proper healing, ensuring that the bone does not heal in a deformed position.