A method for the determination of the activated partial thromboplastin time (APTT) in a one-step reaction, in which the determination of APTT is initiated by contacting a reagent that contains the substances necessary for the APTT determination in a premixed form, with the sample to be tested. A reagent...http://www.google.ca/patents/US5506146?utm_source=gb-gplus-sharePatent US5506146 - Measurement of the activated partial thromboplastin time (APTT) in a one-step reaction
