Research hypothesis * Diving to depths up to 90msw with an oxygen partial pressure of 130kPa in the breathing gas will affect the central nervous system. * Diving to depths up to 90msw with an oxygen partial pressure of 130kPa in the breathing gas will induce inflammatory changes. Objectives: * To investigate the presence of cerebrospinal biochemical markers in blood after diving to depths up to 90msw with an oxygen partial pressure of 130kPa in the breathing gas. * To investigate the presence of inflammatory markers in blood after diving to depths up to 90msw with an oxygen partial pressure of 130kPa in the breathing gas. * To investigate the presence of venous gas emboli (VGE) in blood after diving to depths up to 90msw with an oxygen partial pressure of 130kPa in the breathing gas.
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Concentration of cerebrospinal and inflammatory biochemical markers in blood
Timeframe: Three months