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Lab Test Dictionary

Bile Acids, Bowel Dysfunction, 48-Hour Feces (BA48F)


Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Specimen Type

Stool, Timed Collection

Performing Lab

Mayo Medical Lab

Epic ID

Other Reference Test

Lab Test Days

Wednesday; A.M.

Standard TAT

2-9 Days

Collection Information

Specimen Required

5 g of 24, 48, 72 Hour Stool

Container Type

24, 48, 72-Hour Stool Container

Collection Instructions

Call lab for special Mayo stool collection kit. Special Mayo stool collection kit is located in send out cupboard. For 3 days prior to and during the collection period: 1. Patient should be on a fat-controlled diet (100-150 g fat per day). 2. No laxatives (particularly mineral oil and castor oil) 3. No synthetic fat substitutes (eg, Olestra) or fat-blocking nutritional supplements. Collection Instructions: 1. DO NOT USE OTHER CONTAINERS. 2. All containers must be sent together. 3. The entire collection must contain at least 5 g of feces. 4. The number of containers sent should be indicated on the labels (1 of 4, for example). Patient may store sample at refrigerate temperature during collection period. Barium interferes with test procedure; a waiting period of 48 hours before stool collection analysis is recommended.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: Unacceptable; Refrigerated: Unacceptable; Frozen: 30 Days

Rejection Criteria

Other containers used for time stool collection

Test Volume Required

5 g Stool

Minimum Test Volume

5 g Stool

CPT Codes