Implantable glucose sensor

A sensor adapted for positioning in an environment characterized by the presence of biological molecules which are substrates for or products produced by enzymes in order to determine the presence of said molecules, said sensor comprising:

• an elongated flexible body comprising a length of electrically conductive indicating electrode wire covered with an electrically insulative material, there being a portion of said material removed from said electrode wire to define an enzyme-receiving zone;
• an enzyme operably immobilized on said zone to present an enzymatic indicating surface;
• a reference electrode supported on said body and presenting a section adapted for exposure to said environment,
• said indicating surface and said reference electrode section being laterally spaced apart along the length of said body and each substantially circumscribing the body,
• substantially the entireties of said circumscribing indicating surface and said circumscribing reference electrode section being exposed for reaction with said environment when the sensor is placed therein,
• said indicating electrode wire serving to support said sensor within said environment without the need for a carrier.