A recompression chamber is a pressure vessel used to treat divers suffering from certain diving disorders such as decompression sickness. A pressure vessel is a structure designed to contain a fluid at a different pressure to the pressure surrounding the structure without changing volume. ... Divers face specific physical and health risks when they go underwater (e. ... Decompression sickness (DCS), divers disease, the bends, or caisson disease is the name given to a variety of symptoms suffered by a person exposed to a reduction in the pressure surrounding their body. ...

Often the terms recompression chamber, decompression chamber and hyperbaric oxygen therapy chamber are used interchangeably. The names reflect the different purposes that the chambers are designed for, rather than their capability. Each is capable, within limits, of operating in the others' role:

• A decompression chamber is used in surface supplied diving to allow the divers to complete their decompression stops at the end of a dive on the surface rather than underwater.
• A hyperbaric oxygen therapy chamber is used in a hospital or sporting context to treat patients whose condition might benefit from hyperbaric oxygen treatment, including divers. Hyperbaric chambers capable of admitting more than one patient (multiplace) and an inside attendant have advantages for the treatment of decompression sickness and are preferred by the U.S. Coast Guard. Divers with serious complications or injuries may be attended to in this manner during recompression. In addition, multiplace chambers are generally capable of greater depth of recompression, should the need arise. For less seriously ill divers, the more common monoplace chamber is often used, especially if it is the only one available. A modified treatment regimen is then used.
• Treatment is ordered by the treating physician (medical diving officer), and is usually in accordance with the U.S. Navy Diving Manual (U.S Navy Diving Tables). Other treatment tables have been developed, including the Catalina Tables, and others, including proprietary tables.
  • Test of pressure. If the diagnosis of decompression illness is considered questionable, the diving officer may order a test of pressure. This typically consists of a recompression to 60 feet sea water for up to 20 minutes. If the diver notes significant improvement in symptoms, or the operator can detect changes in the physical examination, a recompression algorithm is followed.
• Representative diving tables:
  • U.S. Navy Table 6. This diving table consists of compression to the depth of 60 feet sea water with the patient on oxygen. The diver is later decompressed to 30 feet on oxygen, then slowly brought to surface pressure. This table typically takes over three hours and may be extended further. It is the most common treatment for type 2 decompression illness.
  • U.S. Navy Table 5. This diving table is similar to Table 6 above, but is shorter in duration. It may be used in divers with less sever complaints (type 1 decompression illness).
  • U.S. Navy Table 9. This diving table consists of compression to 45 feet sea water with the patient on oxygen, with later decompression to surface pressure. This table is often used by monoplace hyperbaric chambers, or as a follow-up treatment in multiplace chambers.

The U.S. Navy Diving manual is a resource for treatment. It is a non-copyrighted government publication available on CD-ROM A decompression chamber is a pressure vessel used in surface supplied diving to allow the divers to complete their decompression stops at the end of a dive on the surface rather than underwater. ... Surface supplied diver at the Monterey Bay Aquarium, Monterey, California Surface supplied diving refers to divers using equipment supplied with breathing gas using an umbilical cord from the surface, often from a diving support vessel but possibly, indirectly via a diving bell. ... A Decompression Stop is a period of time a diver must spend at a constant depth in shallow water at the end of a dive in order safely to eliminate inert gases from the divers body to avoid decompression sickness. ... Hyperbaric oxygen therapy (HBOT) is the medical use of oxygen at a higher than atmospheric pressure. ... A physician visiting the sick in a hospital. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ...