METHOD AND DEVICE FOR DETERMINING BLOOD PLASMA SAMPLE COAGULATION RATE Russian patent published in 2001 - IPC

FIELD: medicine. SUBSTANCE: method involves placing the sample prepared according to rules of coagulologic analysis into a cell. The cell is illuminated with optical radiation source recording the radiation passing through the cell with sample. Starting reagent is added to the sample in stirring it with magnetic mixer and successive changes in optical density of the sample due to starting reagent added and fibrin arising in the sample. Coagulation time is calculated from the recorded values. Cell bottom has recess in its middle part. The recess has circular cross- section in the plane parallel to cell base. The recess has spherical surface. Stirring member of the magnetic mixer has two ferromagnetic balls touching each other. Radius of magnetic mixer ball r and that of the recess-building sphere Rc are bound with relation 7r. EFFECT: high accuracy and reliability of measurements including slowly coagulating blood samples. 14 cl, 2 dwg