Decreased urine output Oliguria UMLS:C0028961 HP:0100520 MSH:D009846 The decreased output of urine may be a sign of dehydration, renal failure, hypovolemic shock, multiple organ dysfunction syndrome, or urinary obstruction/urinary retention. Low output of urine, clinically classified as an output below 300-500ml/day. SNOMEDCT_US:83128009 2010-12-20T10:42:40Z SNOMEDCT_US:718403007