Does this test have other names?
Urine albumin, 24-hour urine test for albumin
What is this test?
This test looks for a protein called albumin in your urine. The test is used to check
for kidney damage or disease.
Albumin is a protein in your blood. It helps keep the correct balance of fluid between
your blood vessels and the body tissues they supply. The kidneys filter your blood
to remove waste products. Ideally, the waste products end up in your urine, and albumin
and other proteins stay in your blood vessels. So if albumin shows up in your urine,
it may be a sign of kidney damage. But a better way to tell if you have kidney damage
is to see how much albumin you lose in 24 hours.
Why do I need this test?
You may have this test if your healthcare provider thinks you have kidney disease
or if you have diabetes.
You may need to have this test again in 1 to 2 weeks. This is so your healthcare provider
can see if your urine albumin level is rising.
What other tests might I have along with this test?
Your healthcare provider might also do tests to check for other waste products in
your blood. These include creatinine and urea nitrogen. If your kidneys are working
the way they should, these waste products are removed from your blood.
You may have tests to see how much creatinine is in your urine. These tests help your
healthcare provider figure out your urine albumin/creatinine ratio. This helps to
screen for, diagnose, and monitor treatment for kidney disorders.
You may also have a test to figure out your glomerular filtration rate. Tiny blood
vessels in the kidney, known as glomeruli, keep protein from seeping into your urine.
If your glomeruli are damaged, more protein will seep into your urine.
What do my test results mean?
Many things may affect your lab test results. These include the method each lab uses
to do the test. Even if your test results are different from the normal value, you
may not have a problem. To learn what the results mean for you, talk with your healthcare
A normal amount of albumin in your urine is less that 20 mg a day. A normal total
protein amount in your urine is less that 150 mg a day.
If your test shows high levels of urine albumin, or a rise in urine albumin, it could
mean you have kidney damage or disease.
If you have diabetes, one possible cause of an increased urine albumin is kidney disease
How is this test done?
This test requires a urine sample. Your healthcare provider may want to use a 24-hour
urine sample. For this type of sample, you must collect all the urine you make for
24 hours. Empty your bladder completely first thing in the morning without collecting
it and note the time. Then collect your urine every time you go to the bathroom for
the next 24 hours.
Does this test pose any risks?
This test has no known risks.
What might affect my test results?
Your test results might be affected if you:
Have a urinary tract infection
Have a fever
Have high blood pressure
Have high blood sugar
Have certain cancers such as bladder cancer
Have certain kidney diseases like glomerulonephritis or a disease that affects the
kidney like lupus
Certain medicines also can increase or decrease the amount of protein in your urine.
How do I get ready for this test?
You don't need to prepare for this test. But be sure your healthcare provider knows
about all medicines, herbs, vitamins, and supplements you are taking. This includes
medicines that don't need a prescription and any illicit drugs you may use. If you
are doing a 24-hour test, make sure you understand how to collect the sample. Ask
if there are any foods you should not eat before or during the test.