Acute Kidney Injury

You might have the following tests to diagnose acute kidney injury:

• Blood tests. A sample of your blood may show fast-rising levels of urea and creatinine. This helps show how your kidneys are working.
• Urine output measures. Measuring how much urine you pass in 24 hours may help find the cause of your kidney failure.
• Urine tests. A sample of your urine may show something that suggests a condition that might explain kidney failure. This is called urinalysis.
• Imaging tests. Imaging tests such as ultrasound and CT scans can show your kidneys.
• Removing a sample of kidney tissue for testing. Your healthcare professional may suggest removing a small sample of your kidney tissue for lab testing. This is called a biopsy. A needle put through your skin and into your kidney removes the sample.