A new and simple method of quantifying the bleeding time.

Disorders which produce an increase in blood loss after skin trauma do not necessarily result in a prolongation of the bleeding time. A standardized method to quantify this blood loss using the Coulter Counter model S (or other available haemoglobinometer) is reported. The need for and use of such a technique is illustrated by the investigation of primary or secondary haemostatic disorders and assessment of transfusion studies.