CREATININE CLEARANCE – URINE 24HRS Test

The Creatinine Clearance – Urine 24 Hours Test measures how effectively the kidneys filter creatinine from the blood and excrete it into the urine over a 24-hour period. Creatinine is a waste product produced by normal muscle metabolism and is removed from the body by healthy kidneys. This test combines the results of a 24-hour urine creatinine measurement with a blood creatinine test to calculate creatinine clearance, which provides an estimate of the kidneys’ filtering capacity, also known as the glomerular filtration rate (GFR).

This test is commonly used to assess kidney function, diagnose and monitor acute kidney injury (AKI) and chronic kidney disease (CKD), and evaluate patients with conditions such as diabetes, high blood pressure, urinary tract disorders, or kidney disease. It may also be recommended before certain surgeries, during treatment with medications that can affect kidney function, or when more precise kidney function assessment is required than serum creatinine alone. Although estimated GFR (eGFR) is widely used today, the Creatinine Clearance Test remains valuable in specific clinical situations where a direct measurement of kidney filtration is needed.

CREATININE CLEARANCE – URINE 24HRS Test is Recommended for Individuals:

• Individuals with suspected or diagnosed kidney disease.
• People with diabetes or high blood pressure requiring kidney function monitoring.
• Patients with chronic kidney disease (CKD) or acute kidney injury (AKI).
• Individuals undergoing evaluation before surgery or kidney-related treatments.
• Patients taking medications that may affect kidney function.
• People with unexplained changes in kidney function or abnormal creatinine levels.
• Anyone advised by a healthcare provider to undergo creatinine clearance testing.

FAQs

1. What is the Creatinine Clearance 24-Hour Urine Test used for?
The test measures how efficiently the kidneys remove creatinine from the blood, helping assess kidney function and estimate the glomerular filtration rate (GFR).

2. How do I collect a 24-hour urine sample?
Collect all urine passed during a continuous 24-hour period in the container provided by the laboratory. Accurate collection is essential for reliable test results. A blood sample for serum creatinine is usually collected during or at the end of the collection period.

3. What does a low creatinine clearance result indicate?
A low creatinine clearance may indicate reduced kidney function, which can occur in chronic kidney disease, acute kidney injury, dehydration, or other conditions affecting the kidneys. Your healthcare provider will interpret the results along with other kidney function tests and your medical history.