Apparatus of the detection of a change in viscosity, by measurement of a relative sliding, in particular for the detection of the coagulation time of the blood.

摘要

This device for detecting the change in viscosity of a fluid medium in the time is characterized in that it comprises a driving element (11) and a driven element (16) having respective walls (15 and 17) with screw - to - screw which delimit between them a chamber (12) of the calibrated volume adapted to receive a dose of fluid (13), the driven element (16) being driven in rotation by the driving element (11) with a relative sliding a function of the viscosity of the fluid, which provides the coupling between the two elements and means (19 and 20) for measuring the relative slip. & br / such an apparatus is intended for the measurement of the clotting time of a blood sample into contact with an appropriate reagent deposited in the form of a layer on at least one of the walls (15 and 17) with screw - to - screw of the elements (11 and 16). br / application to coagulometers.