Reducing Substances, Stool
Test Code
Clinical Significance
Reducing Substances, Stool - 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.
Test Resources
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Test Details
Methodology
Reference Range(s)
Preferred Specimen(s)
10 grams random stool in a plastic leak-proof container
Minimum Volume
3 grams
Collection 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
Specimen Stability
- Room temperature: 4 hours
- Refrigerated: 24 hours
- Frozen: 60 days
Reject Criteria
Received thawed • Specimens in paint cans
Setup Schedule
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.
Refrigerated: 24 hours
Frozen: 60 days