Test Details
Methodology
Microscopic examination following staining with Oil Red O. Only fibers with identifiable cross striations are counted.
Result Turnaround Time
4 - 7 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.
Test Includes
Qualitative fat (total and neutral) and muscle fibers
Use
Evaluate malabsorption syndromes, pancreatic exocrine dysfunction, or gastrocolic fistula
Specimen Requirements
Specimen
Stool (random)
Volume
3 g
Minimum Volume
1 g
Container
Plastic screw-cap vial
Collection Instructions
Do not contaminate outside of container; do not overfill container.
Reference Range
• Total fats (neutral fats, soaps, and fatty acids): Normal (<100 droplets/hpf)
• Neutral fats: Normal (<60 droplets/hpf)
• Muscle fibers: Normal (<10 fibers/hpf)
Storage Instructions
Refrigerate at 2°C to 8°C. Do not freeze.
Patient Preparation
Patient is required to eat adequate amounts of red meat for 24 to 72 hours before testing. Specimens obtained with a warm saline enema or Fleet® Phospho-Soda® are acceptable. Specimens obtained with mineral oil, bismuth, or magnesium compounds are unsatisfactory. Barium procedures or laxatives should be avoided for one week prior to collection of the specimen.
Causes for Rejection
Purgatives other than saline or Fleet®; specimen contaminated with urine; specimen obtained with mineral oil, bismuth, or magnesium compounds; specimen on outside of container
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 049684 | Fecal Fat/Muscle Fibers, Qual | 016691 | Fats, Neutral | 12598-9 | ||
| 049684 | Fecal Fat/Muscle Fibers, Qual | 016709 | Fats, Total | 42668-4 | ||
| 049684 | Fecal Fat/Muscle Fibers, Qual | 012393 | Muscle Fiber, Stool | 2605-4 | ||
| Order Code | 049684 | |||||
| Order Code Name | Fecal Fat/Muscle Fibers, Qual | |||||
| Order Loinc | ||||||
| Result Code | 016691 | |||||
| Result Code Name | Fats, Neutral | |||||
| UofM | ||||||
| Result LOINC | 12598-9 | |||||
| Order Code | 049684 | |||||
| Order Code Name | Fecal Fat/Muscle Fibers, Qual | |||||
| Order Loinc | ||||||
| Result Code | 016709 | |||||
| Result Code Name | Fats, Total | |||||
| UofM | ||||||
| Result LOINC | 42668-4 | |||||
| Order Code | 049684 | |||||
| Order Code Name | Fecal Fat/Muscle Fibers, Qual | |||||
| Order Loinc | ||||||
| Result Code | 012393 | |||||
| Result Code Name | Muscle Fiber, Stool | |||||
| UofM | ||||||
| Result LOINC | 2605-4 |