Abstract
(1) The xenon method has been used to measure renal blood flow in 60 of the first 67 kidney transplants carried out in this department. (2) The method has proved to be of definite clinical value as a check of the perfusion of the kidney at the time of transplantation. (3) Persistently low flow values or values that decline markedly during the course of the operation are bad prognostic signs. With a flow value below approximately 100 ml/min/100 g there has been no eventual function. (4) A high flow value has been associated with either immediate or later renal function.