The hyperbaric oxygen therapy consists of submitting a patient to an environment pressure above the atmospheric pressure, within a sealed chamber, breathing pure oxygen. These chambers are essentially pressure-resistant metallic cylinders, equipment with watchers or windows. Some chambers, designed for individual treatment, are built with pressure-resistant clear acrylic, allowing for visual contact with the patient and minimizing the incidence of signs of claustrophobia.
       A oxigenoterapia hiperbárica consiste em submeter um paciente a uma pressão ambiental superior a atmosférica, denFor the patient's safety and comfort, the hyperbaric chambers are equipped with a radio system, keeping permanent communication between the patient and the oxygen therapy service staff.
       Throughout the treatment, the patient is monitored through measurements of PA, FC, FR, ECG, EEG, body temperature and skin oxymetry; he may even be assisted with respirators, submit himself to venous infusions, transfusions, wound or cavity drainage.

     Decompressive disease - a disease that may assault the diver who does not comply with the decompression tables recommended for the time spent in this activity. The depth achieved during diving ends up by manifesting itelf as pain in the joints and neurological symptoms, such as paralyses of parts of the body.

Sources: http://www.bubbledivers.net/doenca_descompressiva.htm
http://www.oxigeniohiperbarico.com.br/