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Oxalate Urine Test, Quantitative, 24-Hour

That Oxalate Urine Test looks for the presence of certain toxic substances in the intestinal tract.

Sample Report

Test Code: 003970

Also Known As: Oxalic Acid

Methodology: Enzymatic

Preparation: You must take your lab order to the lab to obtain a proper specimen container before collection. Avoid vitamin C supplements and vitamin C-rich foods for 48 hours prior to collection. Urinate at 8am and discard the specimen. Then collect all urine in 24-hour period, ending with final collection at 8am the next morning. Refrigerate the collected urine between all voidings or keep it in a cool place. Screw the lid on securely. Transport the specimen promptly to the laboratory. Container must be labeled with full name, date and time collection started, and date and time collection finished.

Test Results: 2-3 days. May take longer based on weather, holiday or lab delays.


Type:  Urine

Patients who form calcium oxalate kidney stones appear to absorb and excrete a higher portion of dietary oxalate in urine than do normals. Hyperoxaluria is not uncommon in subjects with malabsorption. Twenty-four hour urine collections for oxalate are indicated in patients with surgical loss of distal small intestine, especially those with Crohn's disease.

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