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?
Initiate IV fluid therapy to manage hypotension.
Place the patient in a left lateral position to prevent aspiration.
Administer high-flow oxygen and prepare for potential intubation.
Conduct a thorough spinal assessment before proceeding with further treatment.