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26041 Reducing Substance, Feces (UREDF)

Reducing Substance, Feces (UREDF)
Test Code: UREDFSO
Synonyms/Keywords
stool sugar, fecal sugar
Test Components

Screening test for:

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

- Monosaccharide malabsorption

Useful For
Assisting in the differentiation between osmotic and non-osmotic diarrhea.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​No ​Fecal ​Sterile Container ​Clean Sage Cup ​3 grams ​2 grams ​2 grams
Collection Processing Instructions

1. Collect a loose, unpreserved, random stool 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 Stability Information
Specimen Type Temperature Time
​Fecal ​Frozen ​7 days
Rejection Criteria
Specimens from timed collections (24, 48 or 72 hours)
​Formed stool
​Urine and Stool mixed
Interference

This test has poor sensitivity for oligosaccharides.

Antibiotics can alter the intestinal flora and affect acid production.

False-positive reactions due to drugs (salicylates, penicillin, ascorbic acid, nalidixic acid, cephalosporins and probenecid) are possible.

Stool may be contaminated with urine, in which case glycosuria will give false-positive results.

Diaper collections can be falsely decreased as the fluid portion containing water soluble sugars is absorbed into the diaper.

Ambient transport temperatures result in growth of bacteria that consume sugars resulting in falsely decreased values.

Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Clinic Laboratories ​Monday through Saturday ​1 day ​Benedict's Copper Reduction Reaction
Reference Lab
Reference Range Information
Performing Location Reference Range
​ ​Mayo Clinic Laboratories​Negative or trace
Interpretation

Negative: negative

Normal: < or =0.25 g/dL (trace)

Suspicious: >0.25 to 0.50 g/dL (grade 1)

Abnormal: >0.50 g/dL (grade 2-4)

Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​84376 ​1
Synonyms/Keywords
stool sugar, fecal sugar
Test Components

Screening test for:

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

- Monosaccharide malabsorption

Ordering Applications
Ordering Application Description
​Centiricty Reducing Substance, Feces (UREDF)
​Cerner Reducing Substance, Feces (UREDF)
​COM Reducing Substance, Feces (UREDF)
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​No ​Fecal ​Sterile Container ​Clean Sage Cup ​3 grams ​2 grams ​2 grams
Collection Processing

1. Collect a loose, unpreserved, random stool 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 Stability Information
Specimen Type Temperature Time
​Fecal ​Frozen ​7 days
Rejection Criteria
Specimens from timed collections (24, 48 or 72 hours)
​Formed stool
​Urine and Stool mixed
Interference

This test has poor sensitivity for oligosaccharides.

Antibiotics can alter the intestinal flora and affect acid production.

False-positive reactions due to drugs (salicylates, penicillin, ascorbic acid, nalidixic acid, cephalosporins and probenecid) are possible.

Stool may be contaminated with urine, in which case glycosuria will give false-positive results.

Diaper collections can be falsely decreased as the fluid portion containing water soluble sugars is absorbed into the diaper.

Ambient transport temperatures result in growth of bacteria that consume sugars resulting in falsely decreased values.

Useful For
Assisting in the differentiation between osmotic and non-osmotic diarrhea.
Test Components

Screening test for:

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

- Monosaccharide malabsorption

Reference Range Information
Performing Location Reference Range
​ ​Mayo Clinic Laboratories​Negative or trace
Interpretation

Negative: negative

Normal: < or =0.25 g/dL (trace)

Suspicious: >0.25 to 0.50 g/dL (grade 1)

Abnormal: >0.50 g/dL (grade 2-4)

For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Clinic Laboratories ​Monday through Saturday ​1 day ​Benedict's Copper Reduction Reaction
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​84376 ​1
For most current information refer to the Marshfield Laboratory online reference manual.