Abstract: The system includes an assortment (10) of sensors (10a, 10b, 10c), the working electrode (14a) of each sensor being covered with a specific reagent of a given proteolytic enzyme, including a substrate capable of releasing leaving groups (LG) via the action of said enzyme, a measuring apparatus (20) having an electronic circuit imposing a current, whose intensity or voltage may or may not be variable, between the electrodes, and for receiving in return a signal representative of the release of the LG, and an electronic apparatus (30) for processing the transmitted signal and displaying, on a display screen (32), an indication representative of the release of the LG as a function of time. Application to determination, in a plasma or whole blood sample, of the factors responsible for a coagulation anomaly.

Abstract: The device includes data entry means (10), control means (14) connected to means (12) for displaying said data. The invention is characterised in that it further includes a processing unit (16) inserted between the data entry means (10) and the control means (14). The processing unit (16) includes a memory (11) for storing reference times and particularly the Time Out, a counter (18) storing the time TC that elapses from the start of a manipulation and the time TM the elapses between two manipulations, and a comparator (21) including a first comparison unit (23), which acts on the one hand on an ON/OFF switch (24) to interrupt, via control means (14) the energy supply when TC>TO and which, on the other hand, enables TO to be altered at the end of a series of manipulations as a function of certain reference times of the memory and the speed at which the manipulations have been carried out.