National Hyperbaric of Tampa Bay is a Hyperbaric Oxygen Therapy that has been known to help people suffering from RSD, brain injuries, stroke, chronic pain and diabetes. National Hyperbaric is operated by Dr. Allan Spiegel who has practiced neurology for 25 years in Palm Harbor. Dr Spiegel is affliated with Morton Plant and Mease Countyside in Palm Harbor. Hyperabaric oxygen therapy is the use of 100% oxygen under increased pressure. At this clinic, this treatment in carefully monitored.