Final answer:
The best device for moving a patient with a suspected lumbar spinal injury over uneven terrain is a flexible stretcher.
Step-by-step explanation:
The BEST device for moving a patient with a suspected lumbar spinal injury as a single unit over uneven terrain is the flexible stretcher. The flexible stretcher, also known as a vacuum mattress or KED (Kendrick Extrication Device), provides more support and immobilization compared to other devices such as wheeled stretcher, long spine board, or short spine board.
The flexible stretcher is designed to mold to the patient's body shape, providing a secure and comfortable fit while minimizing any movement that may exacerbate the spinal injury. It is especially useful on uneven terrain as it allows for better weight distribution and shock absorption, reducing the risk of further injury.
Therefore, the flexible stretcher is the ideal device for safely moving a patient with a suspected lumbar spinal injury over uneven terrain.