Abstract: The new RAPID THROMBOCHEK TEST KIT is based on thrombochek screening test for measurement of hyperaggregable platelets in whole blood, which may be present either in form of circulating platelet aggregates, spontaneously aggregating platelets or reacting to weak agonist of platelet aggregation in low concentration—all together, in order to investigate thrombotic tendencies and to assess the efficacy of antithrombotic therapy all measured with help of hematology cell counter and magnetic stirrer at 37° C. of temperature. This is compared to the other existing microscopic method and shows 0.97% correlation. RAPID THROMBOCHEK TEST KIT based on the above methodology is to be used with the aid of an automated hematology analyser and is made available for routine clinical and office laboratory use.