Patent ID: 7763207

Claim:
A flow-through device for measuring the platelet function of primary hemostasis, the aggregation and/or the coagulation and/or the viscosity of the blood, with a reservoir, which is disposed in a housing and from which blood can be taken for the measurement and conveyed through an aperture, said device comprising a stirring device arranged in the reservoir and moved in such a manner, that a stirrer part of the stirring device thoroughly mixes the blood in the reservoir during the measurement and keeps it in motion, wherein the stirrer part of the stirring device in the reservoir is disposed on a stirring rod, which extends in the longitudinal direction of the housing and can be moved in the longitudinal direction of the housing by a driving mechanism; wherein the stirring device, in the region of the blood supply of the reservoir, has no contact with stationary surfaces of the wall surroundings of the reservoir, so that squeezing of blood cells or other components of the blood can be prevented and substances, which are undesirably released and could lead to distortion of the results of the measurements, do not reach the blood; and wherein the housing has a cylinder and a piston disposed therein, and wherein the aperture is disposed in a bottom wall of the cylinder through which the blood from the reservoir can be passed during a corresponding movement of the piston.