Doctors at the LSU New Orleans School of Medicine have succeeded in reversing brain damage in a two-year-old who nearly drowned in a swimming pool. They used hyperbaric oxygen therapy, which involves breathing pure oxygen in a pressurised enclosed chamber, to revive the toddler after the accident that left her without a heartbeat for two hours. After weeks of this treatment, MRI of the brain showed that the shrinkage of her brain that had happened had almost completely regrown, which was unprecedented. But many doctors have been sceptical about this procedure. Hyperbaric oxygen therapy (HBOT) has generally been used to treat divers suffering from decompression sickness but is not approved by the USFDA as a medical treatment for other diseases. HBOT has been claimed to treat many other diseases but it hasn't been clinically proven. The FDA website says that hyperbaric therapy has not been “proven to be the kind of universal treatment it has been touted to be on some Internet sites”, raising concerns that it may give consumers a wrong impression that could ultimately endanger their health.