Calibration of combined thromboplastins with the International Standard for Thromboplastin, rabbit, plain

Monitoring patients with the lupus anticoagulant while treated with vitamin K antagonists: communication from the SSC of the ISTH

“…Second, 'combined' thromboplastins, which are added with optimal amounts of FV and fibrinogen [15,16] have been suggested instead of 'plain' conventional thromboplastins for INR measurement [17]. In the 'combined' thromboplastins the ratio of reagent to plasma is higher than that achieved in the PT performed with 'plain' thromboplastins.…”