Measurement of fecal fats can be useful in establishing a diagnosis of pancreatic disease. Testing requires the submission of an aliquot from a 24-, 48-, or 72-hour stool collection.
For random stool collections, order Fat, Fecal Qualitative (0020385).
For complete 24-hour stool collections, order Fat, Fecal Quantitative, 24-Hour Collection (Includes Homogenization) (2002354).
For complete 48-hour stool collections, order Fat, Fecal Quantitative, 48-Hour Collection (Includes Homogenization) (2002355).
For complete 72-hour stool collections, order Fat, Fecal Quantitative, 72-Hour Collection (Includes Homogenization) (2002356).
Nuclear Magnetic Resonance Spectroscopy
The patient should be on a diet consisting of 50 to 150 g of fat per day for 3 days prior to the study. Non-absorbable fat substitutes, such as Olestra, should be avoided prior to collection.
24, 48, or 72-hour stool collection. Refrigerate during collection.
Weigh entire collection. Homogenize entire collection (using a graduated cylinder, add sufficient water to give "milk shake" consistency) and aliquot 20 mL (20 g) to a clean, unpreserved vial (ARUP supply #40910). (Min: 5 mL) Collection can be obtained using a Timed Stool Collection Kit (ARUP supply #44192). Additional containers may be used as needed (ARUP supply #28077). Available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787. A homogenized aliquot should be made and submitted from these collection containers. Refer to instructions in Stool Collection-Timed Specimens (24, 48, 72 Hours) under Specimen Handling at www.aruplab.com.
Random collections. Specimens containing barium or charcoal. Specimens in media or preservatives. Containers larger than 500 mL (500 g), such as paint cans, will be rejected and discarded. Submissions without collection time and weight information.
Provide weight of entire collection, volume of water added for homogenization (if applicable), and duration of collection. Complete information is required in order to perform accurate calculations. If weight and time are not provided, the specimen is assumed to be a random collection. Alternative testing can be performed. See Fat, Fecal Qualitative (ARUP test code 0020385).
Ambient: 1 hour; Refrigerated: 4 days; Frozen: 2 weeks
0-5 years: 0.0-2.0 g/24h
6 years and older: 0.0-6.0 g/24h
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|0020378||Fat, Fecal Quantitative||16142-2|
|0060717||Collection Time for Fecal Specimen||13363-7|
- Fat, Quant
- Fat, Quantitative
- Fecal fat aliquot
- fecal fat homogenized aliquot
- Fecal Fat, Quantitative
- Fecal Lipids
- Quantitative Fecal
- Stool Fat, Quantitative
- Total Fat, Quantitative