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  • Chambers designed for more than one patient treatment at the same time (i.e., multiplace) in which the air pressure is raised two to three times above the atmospheric pressure while the patient breathes near 100% medical grade oxygen. The elevated ambient pressure of the hyperbaric chamber reduces the size of gas bubbles trapped in vascular beds and accelerates their dissipation. Circulation is thereby restored to tissue in which the blood supply has been blocked or compromised. Typically the chamber is pressurized using air, and pure oxygen is delivered for patient breathing using a mask or hood. These chambers typically consist of a metal or plastic horizontal cylinder or cubical structure with doors that allow medical staff and equipment, including chamber controls, to remain inside the chamber during treatment. The patient sits on a chair or lies on a stretcher within the chamber. Viewports in the chamber allow external observation. Multiplace hyperbaric chambers are used to treat any condition in which gas bubbles form in the blood, including pulmonary and cerebral air embolism, altitude and decompression sickness, and less frequently iatrogenic gas embolism that may occur during hospital procedures.
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