Which immobilization device is necessary for a fractured ulna after an open reduction internal fixation procedure?

After an open reduction internal fixation (ORIF) procedure for a fractured ulna, a cast is generally the most appropriate immobilization device. This is because ORIF involves surgically realigning the bone fragments and stabilizing them with internal hardware, such as plates and screws. Following this surgical intervention, the bone needs to be held in a stable position to allow for proper healing.

A cast provides rigid stabilization, which is crucial for maintaining the alignment of the ulna during the healing process. It helps to prevent movement that could disrupt the surgical repair, ensuring that the fractured bone can heal correctly. The cast also protects the surgical site from external forces and potential complications, such as displacement or irritation.

Other options like a brace, sling, or splint might provide some level of support or immobilization, but they typically do not offer the same degree of rigid fixation that a cast does. A brace may allow for some range of motion, which is not ideal right after an ORIF. A sling offers support but doesn't immobilize the bone as effectively as a cast, while a splint is usually meant for temporary stabilization rather than long-term healing following a surgical procedure. Thus, a cast is the most suitable choice following an ORIF for a fractured ul