SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Oxygen therapy. A patient about to be loaded into a small chamber used in hyperbaric oxygen therapy (HBOT). Here a flexible chamber is being used in the treatment of a pateint with a heart condition. In this kind of 'soft' chamber the pressure may be raised to up to 0.5 bar (50 kilopascal) above normal atmospheric pressure. The atmosphere is 21% oxygen, although patients in the chamber may be fed pure oxygen through a mask. Photographed at the Cardiology Science Centre of the USSR in Moscow in 1982.
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