Test Overview
Method
Liquid chromatography-tandem mass spectrometry (LC-MS/MS)
Result Included
Creatinine; Serotonin
Aliases/Synonyms
5-hydroxytryptamine; 5-HT
Specimen
Specimen Type
Urine (24 hr)Volume
Sample Volume
2 mL
Minimum Volume
1 mL
Patient Preparation
For 48 hours prior to blood collection, diet should be free of avocado, banana, coffee, tomato, plum, eggplant, hickory nut, walnut, pineapple, and mollusks. A diet low in tryptophan is required. Patients should also abstain from aspirin, corticotrophins, MAO inhibitors, phenacetin, catecholamines, reserpine, and nicotine.
Collection & Handling
Collection Instructions
Collect urine over a 24-hour period in a sterile bottle containing 20-30 mL of 6 N HCl.
Handling Information
Aliquot sample. Store and send frozen.
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Not frozen |
Performance & Interpretation
Turnaround Time
11 days
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| SERO U | Serotonin,U24h | 20384 | nmol/d |
| Creatinine,U | 20603 | mmol/L | |
| Creatinine,U24h | 20604 | mmol/d |
Test Version
Last Updated
2024-04-11