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Test Code UREDF Reducing Substance, Feces

Reporting Name

Reducing Substance, F

Useful For

Assisting in the differentiation between osmotic and non-osmotic diarrhea

 

Screening test for:

-Diarrhea from disaccharidase deficiencies, (eg, lactase deficiency)

-Monosaccharide malabsorption

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Fecal


Specimen Required


Supplies: Stool container, Small (Random), 4 oz Random (T288)

Container/Tube: Fecal container

Specimen Volume: 3 g

Collection Instructions:

1. Collect a loose, unpreserved, random fecal specimen.

2. Freeze immediately.

Additional Information: If additional tests are ordered, aliquot and separate sample prior to freezing to allow 1 container per test.


Specimen Minimum Volume

2 g

Specimen Stability Information

Specimen Type Temperature Time Special Container
Fecal Frozen 7 days

Reference Values

Negative or trace

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

84376

LOINC Code Information

Test ID Test Order Name Order LOINC Value
UREDF Reducing Substance, F 11060-1

 

Result ID Test Result Name Result LOINC Value
6215 Reducing Substance, F 11060-1

Clinical Reference

1. Siddiqui HA, Salwen MJ, Shaikh MF, Bowne WB: Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. Elsevier; 2017:306-323

2. Branski D: Disorders of malabsorption. In: Kleigman RM, Stanton BF, St..Geme JW, eds. Nelson Textbook of Pediatrics. Elsevier; 2016:1831-1850

3. Bhatia J, Prihoda AR, Richardson CJ: Parenteral antibiotics and carbohydrate intolerance in term neonates. Am J Dis Child. 1986;140(2):111-113

4. Book LS, Herbst JJ, Jung AL: Carbohydrate malabsorption in necrotizing enterocolitis. Pediatrics. 1976;57:201-204

5. Krom FA, Frank CG: Clinitesting neonatal stools. Neonatal Network. 1989;8(2):37-40

6. Qualitative methods for total reducing substances. In: Tietz Textbook of Clinical Chemistry. 2nd ed. 1994;968-969

Method Description

Copper sulfate in the tablet reacts with reducing substances converting cupric sulfate to cuprous oxide.(Package insert: AimTab Reducing Substances Tablets. Germaine Laboratories, Inc; 12/2015)

Reject Due To

Urine and stool mixed Reject

Method Name

Benedict's Copper Reduction Reaction

Forms

If not ordering electronically, complete, print, and send a Gastroenterology and Hepatology Client Test Request (T728) with the specimen.

Secondary ID

607696