INITIAL EXPERIENCE WITH THROMBOTEST.

The initial experience of using Thrombotest instead of Quick's one-stage prothrombin time to control anticoagulant therapy is described.Patients well controlled by the Quick test are often found to be over-anticoagulated by Thrombotest standards, so the introduction of Thrombotest has led to widespread reductions in dosage. No improvement in stability of control has been noted. The main advantages of Thrombotest seem to be its technical simplicity and the comparability of results obtained in different laboratories.