Medium urgency
-Very severe
Producing a really small quantity of urine per day, less than 500mL.
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Oliguria
Associated diseases
Severe bleeding
High-altitude pulmonary oedema - HAPO
Haemolytic-uraemic syndrome - HUS (Paediatrics)
Hypovolemic hyponatremia due to extrarenal loss
Trauma to the urethra
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