[Vascular emergencies in acute disease of the leg].

The author essentially studies the urgent surgical nature of embolism and thrombosis. As far as embolism is concerned, he insists on the importance of arteriography. When done during surgery, it makes it possible to determine the existence of unrecognized embolic clots, which would prevent a good distal reflux from being noted. As for thrombosis, the arterial system (common, superficial and deep) is considered as a whole. This system can be made visible only through arteriography, but it must also be explored by techniques which disclose the hemodynamic conditions of the distal sector.