Click here for more information about laboratory operations and procedures
Fecal Fat, Quantitative
|Method||Gravimetric (Quest) or Extraction/spectrophotometry (LabCorp)|
|Patient Preparation||Patient should be on a diet including 100 grams of fat per day for 3 days prior to collection and during collection period. In children, the amount of fat in the diet should be constant for 1 day before the test and during the test. The patient should not have had mineral oil as a laxative prior to specimen
|Collection Instructions||Keep specimen refrigerated during collection. Place collection container on ice if refrigeration is not possible. Collect stool directly into collection containers. Do not fill any container more than 2/3 full. If another container is necessary (i.e. liquid stool), request second identical type of container from the clinical laboratory.|
|Container type||Non-B&T patients: White plastic 1 gallon container
B&T patients: LabCorp approved paint can with clip locks.
Note: the Red top conatiner with white body (MAYO) is ONLY used for the Alpha-1-Antitrypsin test.
|Amount to Collect||See preferred volume|
|Sample type||Timed stool collection (24, 48 or 72 hour)|
|Preferred volume||20 gm|
|Min. Volume||3 gm|
|UCSF Rejection Criteria||Container not refrigerated during collection. Containers receivced > 2/3 full|
|Processing notes||Record total collection time (24,48 or 72 hours) on test requisition. Request the performing laboratory to report the weight of the stool collection. Freeze entire collection can at -20°C and ship on dry ice to China Basin for sendout.
Order Quest # 455 for non-B&T patients. Order LabCorp test #001354 for B&T patients
|Units||Total g/24 h|
|Synonyms||stool fat; stool lipids; fecal lipids|
|Stability||Room temperature 4 days, refrigerated 6 days, frozen at -20C 2 weeks|
|Turn around times||Test performed Monday-Friday. Turnaround time: 7 days.|
|Additional information||Collections of 24 or 48 hours are not recommended since results are subject to greater variability.|
|Last Updated||12/19/2012 4:29:50 PM|
If you have additional questions regarding this test, please call: 415-353-1667