mrcem2-0647

A 32-year-old triathlete is brought in by ambulance after collapsing during a triathlon event. Due to a summer heatwave, several participants have been admitted with heat-related illnesses. The patient is diagnosed with heat stroke and is in critical condition with a low GCS and signs of organ damage. You decide to transfer the patient to a critical care unit.
Which of the following cooling methods would be the LEAST suitable option for this patient?