[Renal complications after general surgical operations (author's transl)]

Oliguria, an easily recognizable symptom of postoperative acute renal failure, is analyzed schematically in terms of various diagnostic aspects and a pragmatic therapeutic procedure. Differentiation among pre-, intra-, and postrenal disturbances is important. Acute renal failure caused by simultaneous and often severe insufficiency of other organs, especially in combination with septicemia, still has a bad prognosis. Prophylaxis in the form of adequate volume substitution and shock therapy is urgent in each case.