Hyperbaric oxygen therapy: Can it reduce stroke damage?

There's no conclusive evidence that hyperbaric oxygen therapy — which involves breathing pure oxygen in a special pressurized chamber — improves the outcome of stroke.

Some researchers theorize that increasing the supply of oxygen to the parts of the brain affected by stroke may reduce the extent of irreversible damage. But this has not been proved.

There have been only three published trials of the use of hyperbaric oxygen therapy in the treatment of ischemic stroke. A 2005 review of these three trials concluded that too few people had been studied to say whether or not hyperbaric oxygen therapy decreases the chance of dying and only one trial suggested any improvement in the ability to perform everyday tasks.

Although hyperbaric oxygen therapy has been found useful in the treatment of a number of conditions — such as decompression sickness and carbon monoxide poisoning — more research is needed to evaluate what, if any, role it plays in stroke treatment.