Bleeding from Standardized Skin Punctures: Automated Technic for Recording Time, Intensity, and Pattern of Bleeding

Abstract

A new method for continuous automated recording of rate of blood loss during determination of the bleeding time by a modification of the Ivy technic is described. The bleeding time by this method is comparable to that determined with the standard Ivy method. Three patterns of bleeding are described. The automated bleeding time was abnormal in patients with von Willebrand’s disease, a patient with an acquired factor VIII inhibitor, a patient with thrombocytopenia who had a normal bleeding time by the Ivy technic, and a patient with an otherwise normal hemostatic survey. In eight patients with congenital coagulation factor deficiencies, the automated bleeding time was normal.