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Reducing Substances, Stool
Test CodeREDUSUB
CPT Codes
84376
Preferred Specimen
10 grams random stool in a plastic leak-proof container
Instructions
Collect fresh stool in a plastic, leak-proof container. Adult and older children patients can collect the specimen by passing feces into plastic wrap stretched loosely over the toilet bowl. Then transfer 10 g of the stool specimen into the plastic container. With young children and infants wearing diapers, the diaper should be lined with clean plastic wrap to prevent absorption. A pediatric urine bag can be attached to the child to ensure that the stool specimen is not contaminated with urine. Then transfer 10 g of the stool specimen from the plastic lined diaper to the plastic container. Do not submit the diaper itself. Freeze and transport frozen.
Transport Container
Plastic screw-cap container
Transport Temperature
Frozen
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature ;Received refrigerated ; Specimens in paint cans
Methodology
Benedict's Solution
Clinical Significance
The presence of reducing substances is useful in the diagnosis of abnormalities in carbohydrate metabolism, i.e., sucrose and lactase. The unabsorbed sugars in stool are measured as reducing substances.
