ARUP's Laboratory Test Directory
| 0080120: Fatty Acids, Free |
| Test Mnemonic: FFA | |
|
Methodology: Spectrophotometry
Performed: Mon, Wed, Fri Reported: 1-4 days |
| Specimen Required: | |
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Collect: One 4 mL SST. Fasting specimen preferred. Collect on ice.
Transport: 1 mL serum, frozen. (Min: 0.3 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.2 mL serum, frozen. Remarks: CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered. Serum must be separated from cells and frozen ASAP, otherwise, lipase continues to break down triglycerides, giving rise to elevated levels of nonesterified (free) fatty acids. Plasma (EDTA, sodium fluoride/potassium oxalate, sodium citrate, or ammonium oxalate), frozen, is also acceptable. Unacceptable Conditions: Nonfrozen or heparinized specimens. Stability: After separation from cells: Ambient: Unacceptable; Refrigerated: 4 hours; Frozen: 1 month |
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| Reference Interval: |
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0-30 days: 0.43-1.37 mmol/L 1 month-9 years: 0.50-0.90 mmol/L 10 years and older: 0.10-0.60 mmol/L |
| CPT Code(s): | |
| 82725 |