What is a malleable splint used for?

A malleable splint is specifically designed to assist in immobilizing an injured limb. This type of splint is made from a material that can be easily shaped and molded to conform to the contours of a limb, providing effective support and stability to fractures or soft tissue injuries. By immobilizing the injured area, it helps to reduce pain and prevent further injury during transport or while awaiting advanced medical care.

In contrast, while options related to head injuries, securing dressings, and airway devices are crucial in trauma care, they do not specifically pertain to the primary function of a malleable splint. Proper immobilization of an injured limb is vital for preventing complications, making option B the correct answer regarding the use of malleable splints in tactical combat casualty care.