Fat, Fecal Quantitative 72-Hour Collection (Includes Homogenization)
Ordering Recommendation

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
2-3 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
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. 
Specimen Preparation
Refer to instructions in Stool Collection-Timed Specimens (24, 48, 72 Hours) under Specimen Handling at 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) 
Storage/Transport Temperature
Unacceptable Conditions
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 
Reference Interval
0-5 years: 0.0-2.0 g/24h
6 years and older: 0.0-6.0 g/24h
Interpretive Data

Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Hotline History
Component Test Code*Component Chart NameLOINC
0020377Fecal Total Weight30078-0
0060772Fat, Fecal Quantitative 72-Hour2271-5
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
  • Fecal fat 72 hour and homogenization