No but I am glad that you mentioned it. I found this article (see below), which provides preliminary evidence for the efficacy of HO in the treatment of symptoms of attentional deficits and reaction time. I have emailed the medical director of a local hyperbaric oxygen clinic. I have asked whether they would be willing to treat someone with ADHD. If I am able to get this treatment I will definitely let you know how it goes. Thanks for sharing this.