System for monitoring at least one blood parameter of the blood of different patients (1, 2, 3) comprising: - a multiplicity of access devices (1a, 2a, 3a) each to create at least one access to the blood of each patient (1, 2, 3) through his or her skin; - a multiplicity of extraction devices (1b, 2b, 3b) each to extract a blood quantity from each patient to obtain in each case at least one blood specimen; - a blood analysis device (7, 9) to analyse the blood specimens in relation to predefinable parameters of the blood and to generate individual blood parameter data sets; - a calculation device which is used in common for a multiplicity of blood parameter data sets of different patients to calculate data sets of medicament parameters of the medicaments to be administered to the respective patients (1, 2, 3) on the basis of the individual blood parameter data sets, wherein the calculation device comprises a receiver unit to which the blood parameter data sets produced by the common blood analysis device (7, 9) are transmitted hard-wired by means of a common line, wherein the receiver unit furthermore receives data on the identification code and period of time code via the common line; - a multiplicity of supply devices to supply the respective medicament to the different patients; wherein each one of the multiplicity of supply devices is fixedly allocated to a respective patient, and - an association device which allocates in each case an identification code to identify a patient and a period of time code to specify a period of time in which the blood specimen was taken, to each data set of the medicament parameters calculated by the calculation device of the patient; characterised in that each data set of the medicament parameters for the respective patient, together with the identification code and period of time code, is transmitted as a common data set by hard-wired link or wireless from the calculation device to at least one respective supply device (19, 20, 21) selected on the basis of the identification code and the period of time code; and the at least one respective supply device (19, 20, 21) supplies a corresponding amount of the respective medicament according to the common data set to the respective patient. - a multiplicity of access devices (1a, 2a, 3a) each to create at least one access to the blood of each patient (1, 2, 3) through his or her skin; - a multiplicity of extraction devices (1b, 2b, 3b) each to extract a blood quantity from each patient to obtain in each case at least one blood specimen; - a blood analysis device (7, 9) to analyse the blood specimens in relation to predefinable parameters of the blood and to generate individual blood parameter data sets; - a calculation device which is used in common for a multiplicity of blood parameter data sets of different patients to calculate data sets of medicament parameters of the medicaments to be administered to the respective patients (1, 2, 3) on the basis of the individual blood parameter data sets, wherein the calculation device comprises a receiver unit to which the blood parameter data sets produced by the common blood analysis device (7, 9) are transmitted hard-wired by means of a common line, wherein the receiver unit furthermore receives data on the identification code and period of time code via the common line; - a multiplicity of supply devices to supply the respective medicament to the different patients; wherein each one of the multiplicity of supply devices is fixedly allocated to a respective patient, and - an association device which allocates in each case an identification code to identify a patient and a period of time code to specify a period of time in which the blood specimen was taken, to each data set of the medicament parameters calculated by the calculation device of the patient;