Changes in blood coagulation following coronary thrombosis measured by the heparin retarded clotting test (Waugh and Ruddick test).

A Study of Certain Aspects of Blood Coagulation in the Postoperative State in Congestive Heart Failure and in Thrombophlebitis.

In recent years a number of tests have been designed for the purpose of detection of accelerated blood coagulation. Among these are the lusteroid tube coagulation test (1-4), the silicone tube coagulation test (5), the modified clot retraction test (6), the modified Lee-White clotting test, employing three test tubes instead of one (7), the heparin retarded coagulation test of Waugh and Ruddick...

Thrombosis and Factor Vii Activity

The tests for the coagulation time of the blood which are in general use have contributed little to the understanding of abnormal tendencies to thrombosis, as they are extremely insensitive to all but gross changes in the coagulation mechanism. A variety of techniques have been evolved to meet this defect. One group of these methods depends on the addition of an inhibitor, e.g., heparin, to the...

An improved plasma recalcified clotting test and its modification as a simple rapid heparin retarded clotting test.

Heparin and the adrenal cortex.

The occasional occurrence of thrombosis after operation has stimulated many attempts to demonstrate an increased coagulability of the blood in the post-operative period. Most of these attempts gave negative or equivocal results, probably because the methods employed were not sensitive enough to record the changes occurring in the complex process of blood coagulation. Nevertheless several invest...

Measured by Activated Clotting Time and Factor Xa Inhibition

The effect of hypothermia on heparin anticoagulation was studied using (siliceous earth) activated clotting time (ACT) measured by the modified Hattersley technique and anti-factor Xa assay measured by the modified Teien technique during cardiopulmonary bypass (CPB). Seventeen adult patients with normal blood coagulation function undergoing their first time coronary artery bypass grafting surge...