Fecal Fat, Qualitative

TEST: 001677
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CPT: 82705
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Synonyms

  • Fatty Acid, Stool
  • Neutral Fat, Stool
  • Qualitative Fat

Test Includes

Neutral and total fats

Expected Turnaround Time

3 - 6 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Information

Related Documents

Specimen Requirements

Specimen

Stool (fresh random)

Volume

Approximately 3 g

Minimum Volume

0.5 g (Note: This volume does not allow for repeat testing.)

Container

Plastic screw-cap vial

Collection

Do not contaminate outside of container; do not overfill container.

Storage Instructions

Refrigerate at 2°C to 8°C.

Stability Requirements

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x3

Patient Preparation

Patient should be on a diet containing at least 60 g of fat. The patient should not use suppositories or mineral oil before the specimen is collected. Oily material (eg, creams, lubricants, etc) should be avoided prior to collection of the specimen.

Causes for Rejection

Specimen contaminated with urine and/or water; specimen on outside of container; specimen containing interfering substances (eg, castor oil, bismuth, Metamucil®, barium)

Test Details

Use

Detect the presence of fecal fatty acids and neutral fat. Increases in neutral fat are commonly associated with pancreatic exocrine insufficiency. Increase in stool total fats (neutral fats, soaps, and fatty acids) is likely to be associated with small bowel disease.

Limitations

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.

Methodology

Microscopic examination following staining with Oil Red O

Contraindications

Administration of barium, bismuth, Metamucil®, castor oil, mineral oil, or ingestion of oily salad dressing within one week prior to collection of the specimen

Reference Interval

• Total fats (neutral fats, soaps, and fatty acids): Normal (<100 droplets/hpf)

• Neutral fats: Normal (<60 droplets/hpf)

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
001677 Fecal Fat, Qualitative 43118-9 016691 Fats, Neutral 12598-9
001677 Fecal Fat, Qualitative 43118-9 016709 Fats, Total 42668-4

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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf