INTRACEREBRAL OXYGEN SATURATION MEASURING DEVICE

摘要

PROBLEM TO BE SOLVED: To measure up the oxygen saturation of intracerebral venous blood easily in a noninvasive manner. SOLUTION: Light send probes 102a and 102b feed two measuring light beams L1 and L2 comprising a plurality of different wavelength components to be absorbed by oxyhemoglobin as well as deoxyhemoglobin into respective internal jugular veins 3a and 3b percutaneously, and light receiving probes 103a and 103b receive both the measuring light beams L1 and L2 subjected to extinction through the internal jugular vines 3a and 3b. A heart sound transducer 101 and an arithmetic means 111 are then employed to discriminate internal jugular vein pulse waves and the other pulse waves. The arithmetic means 111 thereafter detects the extinction variation of the measuring light beam L1 and L2 by the internal jugular vein pulse waves to compute the oxygen saturation of internal jugular venous blood on the basis of the extinction variation for each wavelength component.