What should be applied at the earliest convenience for total spinal immobilization during rescue?

Total spinal immobilization is crucial in rescue scenarios, particularly when a spinal injury is suspected. The effective approach to ensure this immobilization involves using equipment specifically designed for the purpose.

The rescue medvac litter is the correct choice because it is a specialized device that provides full-body support, reducing movement during transport, which is vital to prevent further injury to the spine. The litter allows for secure and stable transportation of a patient while maintaining spinal alignment, which is essential in cases of suspected spinal injuries.

Other options, while they may support aspects of patient care, do not offer the same level of comprehensive stabilization for the spine. A backboard and neck brace, for example, also help in immobilization but may not provide the same stability and protection as a fully enclosed medvac litter during transport. The stabilization pillow and foam pad can aid in securing the patient's head and neck but lack the necessary attributes to offer total body support needed for spinal immobilization.

In rescue scenarios, ensuring that the patient is completely immobilized is paramount, and using the rescue medvac litter facilitates this objective effectively.