IMPLANTABLE SENSOR ELEMENT

A sensor element (110) comprises an implantable, single-piece molded body (112), which comprises a sensor end (114) and a coupling end (116). The molded body comprises a sensor area (118) in the sensor end region, which comprises a sensor material (122). The sensor material modifies an optically measurable property in presence of analytes. The molded body also comprises an optically transparent coupling part (120), which is adapted to transmit electromagnetic radiation to a spectral range between the sensor area and the coupling end. A sensor element comprises an implantable, single-piece molded body, which comprises a sensor end and a coupling end. The molded body comprises a sensor area in the sensor end region, which comprises a sensor material. The sensor material modifies an optically measurable property in presence of analytes. The molded body also comprises an optically transparent coupling part, which is adapted to transmit electromagnetic radiation to a spectral range between the sensor area and the coupling end. The molded body additionally comprises an optically transparent matrix material (124) in the sensor area. The analyte can diffuse partially through the matrix material to the sensor material. The sensor material is embedded in the matrix material. The coupling part is partially formed by the matrix material. Independent claims are included for: (1) a sensor arrangement, which comprises sensor element and optical detectors, which are equipped to a body tissue; and (2) a method for preparing sensor element, which involves introducing prepolymer liquid into a cannula with a curable prepolymer to prepare optically transparent coupling part.