The kidneys are responsible for removing waste and excess fluid from the blood. Kidney function is assessed through blood tests, urine tests, or imaging tests, etc. Patients are often prescribed a combination of tests to most accurately assess kidney function.

While blood uric acid tests can help diagnose gout and monitor uric acid levels in cancer patients undergoing radiation or chemotherapy, urine uric acid tests can help diagnose the cause of kidney stone recurrence and monitor the process of kidney stone formation.