The invention relates to a system and a method for monitoring at least one blood parameter of the blood from a predetermined patient (1), with an access device for setting up access to the patient's blood, a removal device (3) for removing an amount of blood in order to obtain a blood sample, a blood analysis device (12) for analysing the blood sample, and a calculation device (18) for calculating drug parameters of a drug to be administered to the patient as well as a supply device (19) for supplying the drug having the calculated drug parameters. The system identifies the blood samples using bar codes (10, 4), as a result of which there are no errors when assigning the blood to be analysed to the respective patient. The invention relates to a system and a method for monitoring at least one blood parameter of the blood from a predetermined patient, with an access device for setting up access to the patient's blood, a removal device for removing an amount of blood in order to obtain a blood sample, a blood analysis device for analysing the blood sample, and a calculation device for calculating drug parameters of a drug to be administered to the patient as well as a supply device for supplying the drug having the calculated drug parameters.La invención se relaciona con un sistema y un método para monitorear por lo menos un parámetro sanguíneo de la sangre de un paciente predeterminado (1), con un dispositivo de acceso para establecer un acceso a la sangre del paciente, un dispositivo de remoción (3) para remover una cantidad de sangre con el propósito de obtener una muestra de sangre, un dispositivo de análisis de sangre (12) para analizar la muestra de sangre, y un dispositivo de cálculo (18) para calcular parámetros de medicamento de un medicamento que se administrará al paciente así como un dispositivo de suministro (19) para suministrar el medicamento que tiene los parámetros de medicamento calculados. El sistema identifica las muestras de sangre empleando código