A rapid capillary test for out-patient anticoagulant therapy.

These are a water-bath at 37°C., with a rack to contain 10 x 70 mm. test tubes, two pipettes, 0 05 ml. for the blood sample and 0-25 ml. for the reagent,1 a sterile lancet, and a stop watch. six subjects with the adsorbed plasma described above. The results are plotted on double logarithm graph paper. Alternatively, a prothrombin ratio can be employed which obviates the necessity for the dilution curve. Normal results lie between 21 and 25 seconds with our own batch of thromboplastin reagent.