The medical sensor system (10a) comprises a signal pick-up unit (16a), which is implanted in an animal and/or a human body, and a signal processing unit (18a), which is spatially separated from the signal pick-up unit and includes a transmitter (20a) and a receiver (22a). The transmitter emits an alternating magnetic field to act on the signal pick-up unit, and the receiver receives a response signal of the signal pick-up unit, which is generated by the magnetic interaction of the alternating magnetic field with the signal pick-up unit. The medical sensor system (10a) comprises a signal pick-up unit (16a), which is implanted in an animal and/or a human body, and a signal processing unit (18a), which is spatially separated from the signal pick-up unit and includes a transmitter (20a) and a receiver (22a). The transmitter emits an alternating magnetic field to act on the signal pick-up unit, and the receiver receives a response signal of the signal pick-up unit, which is generated by the magnetic interaction of the alternating magnetic field with the signal pick-up unit. The signal pick-up unit: includes functionalized magnetic nanoparticles configured to reversibly bind to an analog of an analyte or a receptor of the analyte and the analog as a function of a concentration of an analyte, and a hydrogel made of a copolymer, where the magnetic nanoparticle is disposed in the hydrogel； is arranged ex vivo and partially surrounded by a biodegradable layer； is formed as a sensor for a glucose analyte； and comprises complete biodegradability, which is thermally activated by applying a strong alternating magnetic field. The analogue includes dextran, and/or the receptor includes concanavalin A. A concentration of glucose, a binding behavior of a magnetic and nanoparticle coated with concanavalin A influence the dextran thus changing a relaxation behavior of the nanoparticle. An independent claim is included for a method for reading a medical sensor system.
