Which of the following is a piece of equipment that ambulance staff should consider for safe manual handling?

Slide sheets are an essential piece of equipment that ambulance staff should consider for safe manual handling because they assist in the smooth transfer of patients with minimal physical strain on the staff. Designed specifically for moving patients, slide sheets reduce friction, allowing for easier repositioning and transfer, whether it's on a stretcher or from one surface to another. This significantly decreases the risk of injury to both the patient and the staff by promoting safe lifting techniques and minimizing awkward postures that can lead to musculoskeletal injuries.

The other equipment mentioned may have their uses in various contexts, but they do not provide the same level of support for patient handling specifically. Standard wheeled carts are more suited for transporting non-patient items, hand trucks are designed for moving boxes or heavy loads rather than patients, and electric lifts, while helpful in certain circumstances, may not always be available or practical in every emergency medical situation. Therefore, slide sheets stand out as the most relevant and effective tool for ensuring safe, efficient manual handling within the ambulance service.