AN elevated prothrombin time as determined by the Quick 1 procedure may be due to many abnormalities, including deficiency of factors I (fibrinogen), II (prothrombin), V (achéal-globulin), VII ...

Claims have been made that this test is more satisfactory for controlling anticoagulant therapy than the Quick prothrombin time. 8–10 Since Quick's test as originally outlined in 1938 was not ...