Synonyms
- 5-hydroxyindoleacetic acid
Expected Turnaround Time
8 - 15 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 Documents
Specimen Requirements
Specimen
Plasma, frozen
Volume
1.0 mL
Minimum Volume
0.5 mL
Container
Green-top (heparin) tube or lavender-top (EDTA) tube
Storage Instructions
Freeze
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 3 days |
Refrigerated | 3 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x6 |
Patient Preparation
Avoid bananas, avocados, plums, eggplant, tomatoes, plantain, pineapple, walnuts, and interfering drugs for a 72-hour period prior to and during collection.
Causes for Rejection
Gross hemolysis
Test Details
Use
Plasma 5-hydroxy-indoleacetic acid (5HIAA or 5-HIAA) is a metabolite of serotonin that can be elevated as a result of carcinoid tumors/carcinoid syndrome.
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
High-pressure liquid chromatography (HPLC)/tandem mass spectrometry
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 504510 | 5-HIAA, Plasma | 1693-1 | 504511 | 5-HIAA, Plasma | ng/mL | 1693-1 |