Patent ID: 6859658
Filing Date: 2005-02-22
Classification: A61B

Abstract:
1. An apparatus for ascertaining the local oxygen turnover and/or the oxygen consumption and/or the O 2 , transport capacity and/or the transported O 2 amount and/or the oxygen consumption rate and/or the oxygen turnover rate and/or the oxygen turnover rate and/or data derived from the content of tissue pigments, ascertained from the primary signals of the local hemoglobin concentration and/or the content of tissue pigments and/or the local oxygen saturation and/or the arterial oxygen saturation and/or the blood flow rate and/or the transported amount of blood and/or the tissue temperature with an optical sensor (S) for placing on the tissue, characterized by at least one white light source (W) and at least one laser source (L) which send light to the sensor (S), one or more detectors (DD, DR) which receive light backscattered from the tissue, and an evaluation unit, and characterized in that optical fibers are provided between light sources (W, L) and sensor (S) and between sensor (S) and detectors (DD, DR), with the optical fibers of the sensor (S) preferably being arranged on a circular shape around a central fiber or a temperature probe (DT), and in that one fiber each for the white light source (W) and for the laser (L), and in each case at least two detection fibers (DR, DD) lie on an arc of a circle at defined distances from the illumination sources, each of which is fed to a separate evaluation.