Mechanism of the development of collatelar circulation III. 133Xe clearance tests in animal experiments

A model of the obstruction of the main artery of the lower extremity was produced in animal experiments. The obstruction was combined on the right side with the constriction of the outflow path, while in this respect the left side served as control. Circulation in the two extremities in the early and late stage was compared by means of the 133Xe clearance technique. In the early stage due to poorer collateral circulation flow on the right side was worse than on the left side. In the late stage the difference was not conspicuous.