What is a creatinine clearance test, and how does it differ from a blood creatinine test?

A creatinine clearance test measures how efficiently your kidneys remove creatinine from the blood by comparing the amount of creatinine in your urine to that in your blood. It involves both a blood sample and a 24-hour urine collection. This test provides a more detailed assessment of kidney function compared to a standard blood creatinine test, which only measures the concentration of creatinine in the blood. A creatinine clearance test gives insight into how well the kidneys are filtering waste over a specific period. During the Test: Procedure, Accuracy, and Potential Issues