Reducing Substances, Feces, Qualitative
| Sunquest Code: | SREDS | ||
| Epic Code: | LAB442 | Epic Name: | REDUCING SUBSTANCES STOOL |
| Synonyms: | Fecal Reducing Substances; Glucose, Fecal | ||
| Methodology: | Glucose oxidase reagent strip, copper reduction reagent tablet, pH paper. | ||
| CPT Code: | 81002 | ||
| Test Includes: | pH and reducing substances | ||
| Turnaround Time: | Performed 7 days/week; results are reported the same day. | ||
| Special Instructions: | Specimen should be frozen if testing cannot be completed within one hour of collection. Bacterial fermentation will result in falsely low results if the specimen is left at room temperature. | ||
Collection Instructions
| Specimen: | Feces |
| Optimal Volume: | 5 mL liquid specimen |
| Minimum\Peds Volume: | 1 mL |
| Collection Instructions: | Usually liquid (diarrheal) feces is used for testing unless formula modifications are being tracked with serial fecal specimens. Deliver to laboratory within one hour of collection. |
Processing and Shipping
| Specimen Processing: | Store in freezer. |
| Shipping Instructions: | Ship on dry ice. |
| Test Performed at or Referral Lab | Urinalysis (UMMC-West Bank) |
Interpretive
| Reference Range: |
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| Use: | Screening test to detect carbohydrate malabsorption due to deficiencies of lactase, sucrase or maltase in infants with diarrhea or failure to thrive. Carbohydrate malabsorption results in increased excretion of reducing sugars (>0.5 g/dL) and decreased pH (<6). Reduction of stool pH is found in infants more often than adults. | ||||||||||||||||
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