activated partial thromboplastin times ( aptt 's ) performed with a semi-automated electrical-conductivity type of clot timer on plasmas from patients with hepatic disease and intravascular coagulation , and on warfarin or heparin therapy , were significantly lower than when done on the same plasmas with either a manual optical method or an automated optical-endpoint instrument .
C0023895
hepatic
C0043031
warfarin