CDOS

Fecal Fat, Quantitative

Test Code: 001354

Performing Lab: LabCorp

CPT Code: 82710 001

Test Link (Copy)

Synonym

Fat, Quantitative; Fecal Lipids; Quantitative Fecal Fat; Stool Fat, Quantitative; Total Fat, Quantitative

Specimen Type

Stool (72-hour)

Specimen Container

One or more clean LABCORP-APPROVED stool collection kits (order LabCorp item ID 03192) containing a 1-gallon can, absorbent sheet, Armlock O-ring, and a leakproof plastic bag

Volume

Entire collection or 5-25 mL of a homogenized aliquot

Specimen Handling

Collect stool directly into can. DO NOT FILL ANY CAN MORE THAN 2/3 FULL. Secure lid with pressure and firmly attach the O-ring. State collection time on the can label. Place the can and the absorbent sheet into the leakproof plastic bag and seal. Send the entire can, or IF SUBMITTING ALIQUOT, follow this procedure: 1) Weigh specimen and collection container and subtract the weight of an empty container of the same type (one-gallon can weight with lid: 360 g metal or 320 g plastic container). This is the "net weight" to be recorded on the request form. 2) Open the container and observe if the contents are liquid. IF LIQUID STOOL, secure the lid, mix, and submit an aliquot of the total collection. IF SOLID STOOL, add deionized water (approximately 500 mL) to the specimen container and mix thoroughly to create a homogenous specimen. Submit a 5-25 mL aliquot of the total collection in an empty stool transport vial (LabCorp item ID 59517) or screw-cap urine bottle (LabCorp item ID 20648), sterile no additives. 3) Record on both the container and the test request form the amount of water added to liquefy the stool or if no water was required.

Patient Prep

Adult patients should be on a standard diet containing 50 to 150 g of fat per day for at least three days before test is started and during the 72-hour collection. In children, the amount of fat in the diet should be constant for one day before the test and during the test. The patient should not have had mineral oil as a laxative prior to specimen collection.

Unacceptable Conditions

Container more than 2/3 full; container leaking; improper container (ie, non-LabCorp-approved paint can, paper cartons, coffee cans, plastic bags, etc); foreign matter other than feces inside of container (ie, spoons, tongue depressors, plastic bags, toilet paper, etc); patient not on special diet; improper labeling of container or request form; specimen on outside of container; specimen contaminated with urine; aliquot without "net weight" and "amount of water added" to homogenize the sample

Temperature

Refrigerate specimen during collection and store at 2(degrees)C to 8(degrees)C.

Methodology

Extraction/spectrophotometry

Stability

Room Temperature: 5 days
Refrigerated: 14 days
Frozen: 14 days

TAT

4 - 7 days shift.

Result Code	Result Name	LOINC
016840	Fecal Weight (Total)	30078-0
016832	Fat,(Fecal Lipids)Qn	16142-2

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