This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Airway, Subject name: Anaesthesia
Hyperbaric oxygen therapy is indicated for treatment of? 
Select and explain. 
A. CO poisoning, B. Caisson disease, C. Gas gangrene, D. All
D: All
Answer: D: All 
Explanation: Hyperbaric oxygen therapy uses a pressurized chamber to expose the patient to oxygen tensions exceeding ambient barometric pressure (at sea level the ambient pressure is 760 mm Hg). Common indications for hyperbaric oxygen include decompression sickness (the "bends"), ceain forms of gas embolism, gas gangrene, carbon monoxide poisoning, and treatment of ceain wounds.