Fecha de publicación: 11/02/2021 Fuente: Wipo "Sensorization" The present invention relates to an enzyme-containing polymer of 2-amino monosaccharide, preferably an enzyme-containing chitosan, comprising: a first repeating unit of the following Formula 1a: a second repeating unit of the following Formula 1b: and a third repeating unit of the following Formula 1c: or conjugate salts thereof, wherein all the substituents are as defined herein. There is also provided a redox polymer and the methods of preparing the enzyme-containing polymer and the redox polymer. The present invention also relates to a sensor, a method of manufacturing the sensor, a monitor, methods for monitoring failure of a tissue and uses of the sensor comprising the enzyme-containing polymer, and the monitor thereof.