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Reducing Substances, Feces [5022X]
Test CodeS52564
CPT Codes
84376
Preferred Specimen
10 g stool collected in a leak-proof container
Minimum Volume
3 g
Instructions
Collect fresh stool in a plastic, leak-proof container. Adult and older children can collect the specimen by passing feces into plastic wrap stretched loosely over the toilet bowl. Then transfer 10g 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 the stool specimen is not contaminated with urine. Then transfer 10g of the stool specimen from the plastic lined diaper to the plastic container. Do not submit the diaper itself. Freeze and transport frozen.
All stool volume for collection to be measured in grams.
All stool volume for collection to be measured in grams.
Specimen Stability
Room temperature: 4 hours
Refrigerated: 24 hours
Frozen: 60 days
Refrigerated: 24 hours
Frozen: 60 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received thawed • Specimens received in paint cans
Methodology
Benedict's Solution
Setup Schedule
Mon-Fri
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.
