The 24-hour urine copper test measures the amount of copper in a urine sample. Elevated levels of urinary copper collected with the 24-hour urine study may also indicate a positive diagnosis of Wilson disease. Low levels of serum ceruloplasmin and serum copper are common findings in Wilson disease.
Doctor may order this test if you have signs of Wilson disease, a genetic disorder that affects how the body processes copper.
The normal range for urine copper is 20–50 ?g per 24 hours, and these patients are far below the lower limit of normal.
