A 17-year-old is brought to the emergency department after being rescued from a backcountry snowboarding accident where he was exposed to freezing temperatures for several hours. His right foot is pale, hard, and numb. After rapid rewarming in a 38°C (100.4°F) water bath, the foot becomes edematous and develops hemorrhagic blisters, consistent with third-degree frostbite. The injury occurred within the last 12 hours. Which advanced therapy has been shown to be most effective in preserving tissue when administered early?