What is the primary use of the Kendrick's Extrication device?

The primary use of Kendrick's Extrication Device is to stabilize a casualty with a suspected spinal injury. This device is specifically designed to immobilize and protect the spine during the extrication process, helping to prevent further injury as the casualty is moved. Its unique structure allows it to conform to the person’s body while providing necessary support, which is crucial in situations where spinal injuries are suspected. The goal is to keep the spine aligned and minimize movement, thereby reducing the risk of exacerbating any potential damage.

The other choices don't align with the primary function of the Kendrick's Extrication Device. For example, while transporting injured personnel is important, this device is specifically focused on spinal stabilization rather than general transport. Similarly, taking vital signs and providing oxygen support are critical components of patient care but fall outside the specific purpose of this extrication device.