The coagulation measurement in the qLabs® Q3 ElectroMeter is based on the coagulometric method. A drop of blood is added to the thromboplastin reagent in the test strip and the time until fibrin formation is measured. With the blood sample thus clotting, the time of clotting is determined by the change in impedance.

The use of INR values (International Normalised Ratio) ensures direct comparability of measured values, worldwide. The “Quick value” (in %), which is still often used in Germany, depends on the test substance used by the respective laboratory. There are more than 25 different test substances from various manufacturers. The same blood can therefore have a “Quick value” of “10%” in one test procedure, which corresponds to a “Quick value” of “30%” in another test procedure.