THIS IS INTERESTING: Oxygen therapy revives brain of toddler who nearly drowned.

In one of the first such confirmed cases, an Arkansas toddler who suffered severe brain injury after nearly drowning has had that brain damage reversed, using a new treatment.

The treatment is known as hyperbaric oxygen therapy, or HBOT. It exposes a patient to pure oxygen within the confines of a carefully controlled pressurized chamber. During the therapy, the body gets three times the normal amount of oxygen, according to the U.S. Food and Drug Administration. . . .

One reason hyperbaric oxygen therapy has been met with skepticism is that it’s been difficult to explain how this treatment works, he said.

But several recent studies involving adult acute injury patients have indicated that even a single session of HBOT can have an immediate impact on the activity of thousands of genes critical to the promotion of tissue recovery, Harch explained.

Amazing that it worked months after the injury.