Serum/plasma free total protein concentration (24-hour urinary collection)

Why This Test Is Done

Your doctor may order this test if they suspect kidney problems, such as nephrotic syndrome, glomerulonephritis, or other conditions causing abnormal protein excretion. It can also be used to monitor chronic kidney disease or track responses to treatments.

What to Expect Before the Test

You’ll need to collect all urine for 24 hours, typically starting after midnight on one day and ending the same time the next day. Drink plenty of water to ensure adequate urine volume. Avoid certain medications or foods that might interfere with results (consult your doctor for specifics).

How the Test Works

Your urine sample is analyzed to measure the total protein content. The test quantifies how much protein is excreted daily, which is compared to standard reference values to identify abnormalities.

Possible Results and What They Mean

Higher-than-normal protein levels in urine may indicate kidney damage, inflammation, or other systemic conditions. Lower-than-normal levels are less common but could suggest dehydration or certain metabolic disorders. Your doctor will interpret results in the context of your overall health.