What is the proper way to transport a casualty with a suspected spinal injury?

The proper way to transport a casualty with a suspected spinal injury is to keep them as still as possible and use a spinal board. This approach minimizes movement of the spine, which is crucial to prevent any potential damage to the spinal cord that could lead to paralysis or other serious complications. The spinal board provides a stable platform that supports the body while allowing for safe transport. This method ensures that the casualty remains immobilized during the transportation process, thereby reducing the risk of exacerbating any injury.

Other methods mentioned might lead to increased movement or stress on the spinal column. For instance, moving someone quickly without regard for their stability can result in unwanted motion that may worsen their condition. Lifting them under their arms compromises their neck and spine alignment, and allowing them to walk could aggravate their injury. Therefore, using a spinal board and ensuring they remain as still as possible is the appropriate and safest practice for handling cases of suspected spinal injuries.