You are dispatched to transport a patient who was pulled from a pool after being submerged for several minutes. The patient is unconscious, has a weak pulse, and is breathing spontaneously, but with noticeable difficulty. What is the most appropriate initial intervention for managing this patient during transport?
Administer high-flow oxygen and prepare for potential intubation.
Conduct a thorough spinal assessment before proceeding with further treatment.
Place the patient in a left lateral position to prevent aspiration.
Initiate IV fluid therapy to manage hypotension.