What procedure is commonly performed for a joint injury?

Splint application is a common procedure performed for a joint injury because it serves several critical functions in the management of such injuries. A splint helps to immobilize the affected joint, thus preventing further movement that could exacerbate the injury or cause additional damage. It also provides support and can alleviate pain by stabilizing the joint, which is crucial in the initial phases of treatment. By keeping the joint stable and in a protected position, a splint facilitates better healing conditions and can assist in the process of preparing the patient for further assessments or treatments, such as imaging or surgery if needed.

Other options like CT scans and ultrasounds are imaging techniques that aid in diagnosing the extent and nature of the injury rather than serving as direct interventions. Laparoscopy is a surgical procedure generally used for interventions in the abdomen, making it inappropriate for treating joint injuries. Therefore, splint application stands out as the most practical and immediate response for managing a joint injury in the emergency setting.