What is a splint that is inflated to become firm called?

A splint that is inflated to become firm is referred to as a pneumatic splint. This type of splint utilizes air or gas to create pressure, which helps to immobilize and stabilize a fracture or injury. The inflation makes it adjustable, allowing for a custom fit that can be easily modified for comfort and support. Pneumatic splints are particularly useful in emergency situations because they can be quickly applied and provide effective stabilization for broken bones or injured limbs.

Other options, while related to injuries and bone issues, do not pertain to inflating to achieve firmness. A flail chest involves multiple rib fractures that cause instability of a segment of the chest wall, a traction splint is designed to apply a pulling force to align a fractured limb, and a greenstick fracture is a type of incomplete fracture typically seen in children, where the bone bends and cracks but does not break completely. None of those focus on the inflating mechanism that characterizes pneumatic splints.