CREATININE, 24 HRS URINE

Creatinine, 24 Hrs Urine

What it is

The Creatinine, 24 Hours Urine test measures the total amount of creatinine excreted in urine collected over a 24-hour period. Creatinine is a waste product formed from the normal breakdown of muscle tissue and is normally removed from the body by the kidneys. Measuring creatinine in urine helps assess kidney function and provides insight into how well the kidneys are filtering waste.

Uses

This test is used to evaluate kidney function, estimate creatinine clearance, and detect possible kidney disease. It is also used to calculate the glomerular filtration rate (GFR) when combined with serum creatinine levels. Doctors may also order this test to monitor patients with conditions such as diabetes, hypertension, or chronic kidney disease (CKD).

Symptoms That May Lead to the Test

A doctor may recommend this test if you experience swelling in the feet or ankles, persistent fatigue, changes in urination patterns (frequency, foamy urine, or reduced output), high blood pressure, or signs of kidney disease. It is also used in patients with systemic conditions like lupus or diabetes to monitor kidney involvement.

Abnormal Results

Low Urinary Creatinine: May indicate reduced kidney function, kidney disease, or incomplete urine collection. It can also occur in muscle-wasting conditions or malnutrition.

High Urinary Creatinine: May be due to high muscle mass, excessive dietary protein, or intense exercise. It may also reflect over-collection of urine.

Risks

The test is non-invasive aside from the inconvenience of collecting urine over 24 hours. The main risk is inaccurate results if the collection is incomplete or improperly stored.