Albumin - 24 hrs urine

Albumin – 24 Hours Urine is a quantitative laboratory test that measures the total amount of albumin excreted in urine over a complete 24-hour period. Albumin is an important protein normally present in the blood and produced by the liver.

Healthy kidneys retain most albumin in the bloodstream while removing waste and excess water. When the kidney’s filtering units become damaged, albumin can leak into urine. Increased urinary albumin, known as albuminuria, may be an early sign of kidney damage.

Benefits of the Test

• Measures total urinary albumin excretion over 24 hours.
• Supports early detection of kidney-filter damage.
• Helps evaluate diabetic kidney disease.
• Supports monitoring of kidney health in patients with high blood pressure.
• Helps quantify persistent albumin loss more accurately than a single concentration alone.
• Supports assessment of chronic kidney disease.
• Helps monitor progression of known kidney damage.
• Supports evaluation of response to kidney-protective treatment.
• Provides information that can be interpreted with serum creatinine and eGFR.
• Helps identify patients who may require further renal investigation.

Why Doctors Recommend This Test

Doctors may recommend this test for individuals with diabetes, high blood pressure, known kidney disease, abnormal urine results, swelling of the feet or face, foamy urine, or increased risk of chronic kidney disease. It may also be ordered to confirm or quantify albumin detected in a spot urine sample.

Preparation Before Test

• Collect the special 24-hour urine container from the laboratory before beginning.
• Choose a day when you can collect every urine sample for a full 24 hours.
• At the selected starting time, empty your bladder into the toilet and do not collect this first urine.
• Record this time as the beginning of the collection period.
• After that, collect every urine sample passed during the day and night in the provided container.
• At exactly the same time the following day, collect your final urine sample and add it to the container.
• Store the container according to laboratory instructions, usually in a cool or refrigerated location.
• Do not contaminate the urine with stool, water, tissue paper, menstrual blood, or cleaning products.
• If any urine is missed, spilled, or not collected, inform the laboratory because the collection may need to be restarted.
• Inform your doctor about fever, urinary infection, menstruation, pregnancy, strenuous exercise, medicines, and supplements.

Normal Reporting Time

The Albumin 24-Hour Urine test is generally processed after the complete collection is received and the total urine volume and collection duration are recorded. Results are commonly available within 1–2 working days, subject to sample suitability, analytical processing, validation, and laboratory workflow.

Who Should Take This Test?

This test may be recommended for:

• Individuals with diabetes.
• Patients with high blood pressure.
• People with known or suspected chronic kidney disease.
• Individuals with albumin or protein detected in a routine urine test.
• Patients with swelling of the feet, ankles, hands, or face.
• People experiencing unusually foamy urine.
• Individuals with a family history of kidney disease.
• Patients with heart or blood-vessel disease and increased kidney risk.
• People undergoing monitoring for kidney-protective treatment.
• Individuals advised to quantify total daily albumin excretion.

Detailed Information

Albumin is the most abundant protein in blood plasma. It helps maintain fluid within blood vessels and transports hormones, vitamins, medicines, and other substances throughout the body.

The kidneys contain microscopic filtering structures called glomeruli. Healthy glomeruli allow waste and excess fluid to pass into urine while retaining albumin and other important proteins in the bloodstream.

Damage to the glomerular filtration barrier can allow albumin to pass into urine. Small but persistent increases may occur before other indicators of kidney function become abnormal, particularly in diabetic kidney disease.

A 24-hour collection measures albumin excreted throughout an entire day. Urine albumin concentration can vary depending on hydration, physical activity, posture, blood pressure, and time of day. Collecting all urine over 24 hours helps calculate total daily albumin loss.

Accurate collection is essential. Missing even one urine sample, collecting beyond or short of the prescribed period, or failing to include the final sample can make the result unreliable. The total urine volume and exact collection duration should be provided to the laboratory.

An increased result may be associated with diabetic kidney disease, hypertension-related kidney damage, glomerulonephritis, nephrotic syndrome, chronic kidney disease, heart failure, or other renal conditions. However, one abnormal result does not always confirm chronic kidney disease.

Temporary albuminuria may occur after strenuous exercise, fever, dehydration, urinary tract infection, acute illness, uncontrolled blood sugar, severe blood-pressure elevation, or menstrual contamination. Repeat testing may be recommended after temporary factors have resolved.

A result within the laboratory reference range generally indicates that albumin excretion was not significantly increased during the collection period. However, results must be interpreted according to the laboratory’s method and the patient’s risk factors.

A random urine albumin-to-creatinine ratio is commonly used for routine screening because it is convenient and provides useful information. A 24-hour collection may be requested when the doctor needs direct measurement of total daily albumin excretion or confirmation of another result.

Additional evaluation may include urine albumin-to-creatinine ratio, routine urinalysis, urine protein, serum creatinine, estimated glomerular filtration rate, blood urea nitrogen, electrolytes, blood glucose, HbA1c, blood pressure assessment, ultrasound, or other renal investigations.

Results should be interpreted by a qualified healthcare professional together with the completeness of the collection, medical history, diabetes control, blood pressure, kidney-function results, medicines, and other clinical findings.

At Focus Diagnostics, Albumin 24-Hour Urine testing is processed using established quantitative laboratory methodologies, appropriate specimen-handling procedures, analytical quality controls, and validation standards to provide reliable results.