Which consequences result from these experimental results from practice? In the acute angiography in postoperative functional distrubance after transplantation of a human kidney is at first probably always to be reckoned with a rejection process, though this immunological process by no means must be in the foreground of the causal connection of several pathogenetic factors. Therefore, in our opinion it would then be assumed an ischaemia-conditioned cell damage of the tubulus by a longer lasting prefinal circulatory depression or due to a not optimal preservation, when there is in the angiogramme a clear discrepancy to the severity of the postoperative functional distrubance, i.e. when angiographically exists only a slight cortical ischaemia in an otherwise good arterial filling picture and a widely normal capillary filling phase.