[Substitute pathways of the arterial system of the lower extremities].

Some ideas emphazied by RENARD and his collaborators were rediscovered.--Anastomosis doesnt always signify compensation and it is often difficult to appreciate the functional importance of the anastomoses shown by arteriographies.--The most valuable compensations are made by short ways. Long ways only come into action when the shorter are obliterated. Finally a certain number of arteries play an important role in the compensatory circulation, that is:--the system of lumbar arteries--the hypogastric artery--the origin of the deep femoral artery.