The SPECT scans show increase capillary growth and function. This is the strong suit of HBOT. This is why HBOT is so helpful with wound healing. The researchers claim that increased capillary growth can be extrapolated into neuro-regeneration, which has not been shown.

The studies have shown that HBOT helps some with mTBI and appears to do nothing for others with mTBI. They cannot figure out why some are helped and others not.

I have found a local chiropractor who does HBOT for $95 per one hour treatment when a 10 treatment package is purchased. His system goes to 2 atmospheres with 100% oxygen delivered by a Built in Breathing System (BIBS), basically a face mask that delivers the 100% oxygen from an oxygen concentrator. I was dismayed by how little the HBOT tech knew about their system.

I have also found that clinics have two different types of chambers. Many have the much cheaper 'soft' chambers. These are canvas like tubes with just a few small windows. For someone with claustrophobia, they sound scary. Others have the much more expensive hard single or dual chambers. These are often made with plexiglass so the patient can see out. Then there are the huge steel chambers that are the size of a railroad tank car. They can hold up to 10 or more people. The cheaper chambers use the BIBS. The more expensive system use high percentage oxygen in the whole chamber.

The use of HBOT for PTSD sounds very interesting.

If you can afford 40 treatments, I don't see a reason to not try it. I am trying to justify the expense in hope that it will help with my PTSD.