What should be measured in splinting?

The correct choice is related to measuring the opposite body part in splinting. This practice is important because it allows lifeguards or first responders to create a splint that effectively immobilizes the injured limb while ensuring proper alignment and support. By using the uninjured limb as a reference, a splint can be fashioned to the correct size, promoting better stability and minimizing movement that could exacerbate the injury.

Measuring the time of the injury, the patient's weight, or the length of the limb does not provide the same level of immediate utility in immobilization, as these measurements do not directly contribute to the effectiveness or appropriateness of the splinting process. While it may be useful for other medical evaluations or for transport decisions, the critical factor in splinting is to ensure a properly fitted device that can stabilize the injury based on the anatomy of the surrounding, unaffected areas.