Fecal Fat, Qualititative

Last Modified: 3/25/2019 2:38:30 PM

Medical Necessity Documentation:  
Client Notes:  
Patient Preparation: Patient should be on a normal diet which includes fat intake. Patient shouldnot use castor oil, mineral oil, suppositories or barium prior to collection of specimen. 

Fat Substitutes such as Olstra may cause interference and should be avoided. 
Specimen Requirements: 5.0 grams Frozen random Feces/Stool Yellow Top Plastic Container
Collection Instructions: Collect approximately 5 grams of semi-solid stool or approximately 5 mL of liquid stool and transfer to a properly labled leak proof container; 
Minimum Volume: 1.0 gm Frozen Feces/Stool
Transport & Storage: Temperature/Stability:

1 hour Ambient
5 days Refrigerated
30 days Frozen (Transport)

Reference Range: Normal - Tiny fat globules, < 1 micron in diameter and too difficult to count, were observed microscopically under high power.

Abnormal - Fat globules, 1 to 8 microns in diameter, and < 100 globules per high power field were observed microscopically. 

Grossly Abnormal - Large fat globules, 9 to 75 microns in diameter, and so numerous that there was very little fecal background observed microscopically under high power.
Critical Ranges:  
Test Comments: Limitations: Up to 12 grams of fat may be malabsorbed among patients with diarrhea even when the diarrhea is not attributable to fat malabsorption.
Methodology: Microscopic Examination of Sudan-Stained Smear
Clinical Significance: Results may indicate malabsorption or maldigestion. False positive results can occur due to mineral oil or castor oil present in the specimen. Large number of neutral fat globules may indicate steatorrhea.
Custom Panel: No


Turn Around Time: 3 to 5 days
Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed: Quest - Chantilly
PHL Test Code: FEFQL
EPIC Test Code: LAB390
Send Out Test Code: 13118 / 3967X
Alternate Test Names: Lipids, Stool Qualitative; Sudan Stain
Included Tests:  
CPT Coding: 82705

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