About fifteen years or so ago Hyperbaric Oxygen Therapy (HBO) was being promoted in the UK quite heavily and Scope used to get a regular flow of queries from parents considering paying for their child to have it.
However, it is now fairly unusual that it comes up in conversation about potential interventions for children with cerebral palsy, probably due to the lack of independent evidence of it being effective.
It can be difficult to find unbiased sources of information about HBO, but personally I think this summary is useful as it is based on published research:
Hope this helps
Jean Merrilees BSc MRCOT
You can read more of my posts at: https://community.scope.org.uk/categories/ask-an-occupational-therapist