System til tilvejebringelse af blodsukkermålinger til et infusionsapparat

A characteristic determining device (10) for determining a concentration of an analyte in a body of a user, wherein the characteristic determining device (10) is capable of communicating with an infusion device (50) adapted for infusing a fluid into the body of the user and calculating an estimated amount of the fluid to be infused into the body of the user based upon the determined concentration of the analyte in the user and a target concentration of the analyte in the user, the characteristic determining device (10) comprising: a determining device housing (13) adapted to be carried by the user; a receptacle (11) coupled to the determining device housing (13) for receiving and testing an analyte from the user to determine the concentration of the analyte in the user; a determining device processor (17) contained in the determining device housing (13) and coupled to the receptacle (11) for processing the determined concentration of the analyte from the receptacle (11); and a determining device communication system (15) contained in the determining device housing (13) and coupled to the determining device processor (17), said determining device communicating system (15) being configured to transmit a communication including data indicative of the determined concentration of the analyte in the user to the infusion device (50) and to receive an acknowledge response transmitted from the infusion device (50) to confirm receipt by the infusion device (50) of the transmitted communication.