Laboratory Test Information Guide

Details for Serotonin, 24-Hour Urine

Test Name: Serotonin, 24-Hour Urine
Alternate Name(s): 5-Hydroxytryptamine
5-HT
Laboratory: Toxicology/Special Chemistry
Specimen Type: 24-hour urine
Collection Information: 24-Hour Urine Diet and Medication Restrictions: 5-HIAA, Catecholamines, Metanephrines, VMA/HVA, Serotonin

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 of 24-Hour Urine Sample

Collect urine over a 24-hour period in a sterile bottle containing 20-30 mL of 6 N HCl.

Please complete the laboratory label attached to the collection bottle to include patientís name, collection start time and date and collection end time and date.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Monday - Friday
0800-1600
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
10 days
Stat
 
 
Reference Range: ≤1193 nmol/day

Please note change in methodology and reference interval as of October 22, 2021.
Effective Date: 2009-02-12
Revised Date: 2021-10-22
Critical Value:  
Interpretive Comments:  
Special Processing: Minimum volume of urine aliquot is 1 mL.
Comments:  
Method of Analysis: LC-MS/MS
Critical Information Required:  
Storage & Shipment: Store and ship urine aliquot frozen.
System Codes: 
Cerner
SERU24
 
Referred To:  

Questions? Comments? Contact Laura Gopaul