Measurement of fecal fats can be useful for establishing a diagnosis of pancreatic disease. Testing requires the submission of an entire 72-hour stool collection. For random stool collections, order Fat, Fecal Qualitative (0020385). For testing of an aliquot from a 24-, 48-, or 72-hour stool collection, order Fat, Fecal Quantitative, Homogenized Aliquot (2002350). 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).
Nuclear Magnetic Resonance Spectroscopy
New York DOH Approval Status
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.
72-hour stool. Refrigerate during collection. Provide patient a Timed Stool Collection Kit (ARUP supply #44192) available online through eSupply using ARUP Connect™ or contact ARUP Client Services at (800) 522-2787.
Refer to instructions in Stool Collection-Timed Specimens (24, 48, 72 Hours) under Specimen Handling at https://www.aruplab.com. Submit entire 72-hour stool collection in an ARUP approved transport container(s) provided in kit using additional containers as needed for the full collection (available separately, ARUP supply #28077). (Min: 4 g)
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.
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|
|0020377||Fecal Total Weight||30078-0|
|0060772||Fat, Fecal Quantitative 72-Hour||2271-5|
- Fecal fat 72 hour and homogenization