Which cast is used for fracture of radius and ulna?

• A. Abduction Splint/Airplane Cast
• B. Long Arm Circular Cast
• C. Short Arm Circular Cast
• D. Hanging Cast

Answer: (B)

Immobilizing both radius and ulna requires a cast that controls motion at the elbow as well as along the forearm. A long arm circular cast does exactly that by spanning from above the elbow down through the forearm to the hand, stabilizing both bones and limiting forearm rotation. This prevents displacement and maintains alignment during healing.

A short arm circular cast covers the wrist and distal forearm but does not immobilize the elbow, so it can’t reliably control rotation or alignment for fractures involving both forearm bones. Abduction splint or airplane cast is meant for shoulder issues, not forearm fractures, and a hanging cast is used in other contexts and isn’t standard for forearm bone fractures.