Hyperbaric oxygen: the accepted indications, and everything else
A genuine hospital treatment with a defined indication list, and a much larger market operating outside it.
Key takeaways
- Hyperbaric oxygen has accepted indications such as carbon monoxide poisoning and decompression illness.
- The marketed uses for fatigue, long covid, autism, cognition and ageing are not accepted indications.
- Soft inflatable chambers are not interchangeable with hospital grade pressure vessels.
- The evidence does not support hyperbaric oxygen for general wellbeing, ageing or recovery.
Hyperbaric oxygen therapy is one of the few things in this field with an unambiguous clinical home. Hyperbaric medicine societies in Europe and the United States maintain published indication lists, revised periodically, covering carbon monoxide poisoning, decompression illness, arterial gas embolism, certain problem wounds including some diabetic foot ulcers, late radiation tissue injury, necrotising soft tissue infections and a small number of others. Those lists are the product of committee review of the evidence, and they are notable for what they exclude as much as for what they contain.
The commercially marketed set of uses is far broader: fatigue, long covid, autism, cognition, sports recovery, ageing. Some of these have a published trial behind them, often single centre and small. A single trial in a specific population is not an indication. An indication is what survives replication, adverse event data and a committee willing to say no, and the interval between the first encouraging trial and a durable answer is usually a decade.
The hardware distinction matters and is routinely blurred. A hospital grade chamber is a pressure vessel operating at pressures well above two atmospheres with medical staff, fire precautions and monitoring. A soft, inflatable or seated chamber operates only slightly above ambient pressure and is a different physical intervention, whatever it is called in the brochure. The two are not interchangeable, and the research conducted in one does not transfer to the other.
There is a legal dimension to this as well. A medical device in the EU is defined by its manufacturer's intended purpose, and conformity assessment is carried out against that purpose. A chamber certified for one thing and promoted for another is not merely overpromising; it has been placed outside the basis on which it was certified. What the evidence does not support is the use of hyperbaric oxygen for general wellbeing, ageing or recovery, and the accepted indications do not lend their credibility to the rest of the list.
Notes and sources
Each regulatory statement in this article is set against the document it comes from, so you can read the original rather than our summary of it.
1. Accepted indications for hyperbaric oxygen therapy
2. Regulator warning about hyperbaric oxygen marketed for unapproved uses
3. Hyperbaric chambers are regulated as medical devices in the EU
