What is the preferred device for carrying a conscious medical patient down stairs?

The preferred device for carrying a conscious medical patient down stairs is the stair chair. This is because a stair chair is specifically designed for transporting patients in a seated position, which is often more comfortable and secure for conscious patients. The chair allows for better maneuverability in stairways, where the confined space and the need for stability are critical.

Stair chairs typically have features like straps to secure the patient, as well as wheels and a lightweight frame, which make them ideal for navigating stairs. This type of chair also enables rescue personnel to maintain a proper posture and minimize the risk of injury to both the patient and the responders while descending stairs.

In contrast, a stretcher is typically used for transporting patients who are unable to sit up or require a supine position, which doesn't translate well to stairs. A backboard might be used in various emergency scenarios but is not designed for stair transport in an upright position, and a wheelchair may not be suitable for navigating stairs at all.