“We call it the fog. It's like they’ve been awake for a few days straight,” said Col. (Dr.) Michael Richards, 59th Medical Specialty Squadron Undersea and Hyperbaric Medicine section chief. “His wife had to finish his sentences. He could no longer take care of himself, really. He couldn’t manage his finances, he couldn’t drive, he couldn’t take care of his children. He couldn’t make decisions, even on small things like choosing what kind of milk to buy at the grocery store.” For this patient, a fighter pilot, suffering from arterial gas embolism, a condition that causes gas bubbles to enter the blood stream and prevent blood flow - “the fog” was a career ender. Or would have been, without the use of hyperbaric medicine.