[Vigilance of patients with chronic renal insufficiency (author's transl)].

Psychological achievement tests were applied to 56 patients with chronic renal insufficiency for measuring the vigilance. The comparison of test parameters showed a significant impairment with progression of renal insufficiency, an improvement under chronic dialysis treatment depending on complications by medical problems and normal values after successfull transplantation. The vigilance was not influenced by dialysis per se. We conclude that the behaviour of reaction speed, attention performances, and mental concentration reflect the autointoxication of central nervous system in chronic renal insufficiency.