There are two types of indications of hyperbaric oxygen therapy: it may be used as an emergency treatment in certain acute pathologies or as a therapy for chronic long-term pathologies. The indications are regularly updated and assessed through consensus conferences.
Chantre, Foucher, Le Hot, Lefort, Blatteau (2018). [Hyperbaric oxygen therapy, a little-known discipline]. Revue de l’infirmiere, ;67(242):14-15. https://www.ncbi.nlm.nih.gov/pubmed/29907169