The<unk>  chamber at the Neutral Buoyancy Lab. alt=View of the side of a small cylindrical structure with several curved windows and an instrument panel, with a person visible inside All cases of<unk>  should be treated initially with 100% oxygen until hyperbaric oxygen therapy (100% oxygen delivered in a high-pressure chamber) can be provided. Mild cases of the "bends" and some skin symptoms may disappear during descent from high altitude; however, it is recommended that these cases still be evaluated. Neurological symptoms, pulmonary symptoms, and mottled or marbled skin lesions should be treated with hyperbaric oxygen therapy if seen within 10 to 14 days of development.<unk>  on air was shown to be an effective treatment for minor<unk>  symptoms by Keays in 1909. Evidence of the effectiveness of<unk>  therapy utilizing oxygen was first shown by Yarbrough and Behnke, and has since become the standard of care for treatment of<unk> .<unk>  is normally carried out in a<unk>  chamber. At a dive site, a riskier alternative is in-water<unk> . Oxygen first aid has been used as an emergency treatment for diving injuries for years. If given within the first four hours of surfacing, it increases the success of<unk>  therapy as well as decreasing the number of<unk>  treatments required. Most fully closed-circuit diving rebreathers can deliver sustained high concentrations of oxygen-rich breathing gas and could be used as a means of supplying oxygen if dedicated equipment is not available. It is beneficial to give fluids, as this helps reduce dehydration. It is no longer recommended to administer aspirin, unless advised to do so by medical personnel, as analgesics may mask symptoms. People should be made comfortable and placed in the supine position (horizontal), or the recovery position if vomiting occurs. In the past, both the Trendelenburg position and the left lateral decubitus position (Durant's maneuver) have been suggested as beneficial where air emboli are suspected, but are no longer recommended for extended periods, owing to concerns regarding cerebral edema. The duration of<unk>  treatment depends on the severity of symptoms, the dive history, the type of<unk>  therapy used and the patient's response to the treatment. One of the more frequently used treatment schedules is the US Navy Table 6, which provides hyperbaric oxygen therapy with a maximum pressure equivalent to of seawater (2.8 bar PO2) for a total time under pressure of 288 minutes, of which 240 minutes are on oxygen and the balance are air breaks to minimise the possibility of oxygen toxicity. A multiplace chamber is the preferred facility for treatment of<unk>  as it allows direct physical access to the patient by medical personnel, but monoplace chambers are more widely available and should be used for treatment if a multiplace chamber is not available or transportation would cause significant delay in treatment, as the interval between onset of symptoms and<unk>  is important to the quality of recovery. It may be necessary to modify the optimum treatment schedule to allow use of a monoplace chamber, but this is usually better than delaying treatment. A US Navy treatment table 5 can be safely performed without air breaks if a built-in breathing system is not available. In most cases the patient can be adequately treated in a monoplace chamber at the receiving hospital.
Decompression sickness
Morning sickness
Ski sickness
Wooden chest syndrome
Acute HME syndrome
Simulator sickness
Chronic mountain sickness
Acute chest syndrome