Definition
A rapid loss of kidney function caused by dehydration, severe infection, medicines or urinary blockage.
Symptoms
Reduced urine, nausea, fatigue or swelling; sometimes no noticeable symptoms.
How it may be discovered
A recent creatinine rise or reduced urine during acute illness.
When to seek care
Sudden marked urine reduction, collapse, confusion or breathlessness require emergency assessment.
Investigations and tests
Creatinine trends, potassium, urine tests and ultrasound when obstruction is possible.
Reaching a diagnosis
Assessment distinguishes poor kidney blood flow, kidney tissue injury and urinary obstruction; causes may overlap.
Treatment options
Treat the cause, review medicines and drain obstruction. Fluids require supervision; some complications need dialysis. Do not force fluids.
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