Robbins J S, Mittemeyer B T, Neiman H L
J Urol. 1975 Nov;114(5):758-60. doi: 10.1016/s0022-5347(17)67136-2.
Two cases are presented in which a serious contrast reaction was accompanied by a dense persistent nephrogram. This radiologic sign results from the patient's systemic hypotension and provides the physician with an opportunity for earlier, more effective therapy.