Serotonin, Whole Blood

Test Codes

EPIC: LAB1231463, Beaker: XSERB, MAYO: SERWB

Department

Send Outs

Instructions

• This assay is NOT a Serotonin Release Assay (used for the diagnosis of heparin-induced thrombocytopenia).
• This collection requires the use of a tube containing Ascorbic Acid (Serotonin Whole Blood Tube). Please contact the Send Outs Laboratory at 248-551-9045 prior to specimen collection.

Specimen Collection Criteria

Collect: One Lavender-top EDTA tube.

Transfer 2.5 mL whole blood into a plastic Mayo Laboratories Serotonin transport tube containing Ascorbic Acid and freeze immediately.

Physician Office/Draw Specimen Preparation

Maintain whole blood in a Mayo Ascorbic Acid tube frozen (-20°C/-4°F or below) prior to transport.

Preparation for Courier Transport

Transport: 2.5 mL Whole blood in a Mayo Ascorbic Acid tube, frozen (-20°C/-4°F or below). (Minimum: 1.5 mL)

Rejection Criteria

Specimens not collected and processed as indicated.

In-Lab Processing

Maintain whole blood in a Mayo Ascorbic Acid tube frozen (-20°C/-4°F or below) prior to transport.

Transport: 2.5 mL Whole blood in a Mayo Ascorbic Acid tube, frozen (-20°C/-4°F or below). (Minimum: 1.5 mL) 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): Unacceptable
Refrigerated (2-8°C or 36-46°F): 24 hours
Frozen (-20°C/-4°F or below): 90 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Medical Laboratories, Rochester, MN.

Performed

Monday, Wednesday, Friday.
Results available in 5-7 days.

Reference Range

Less than or equal to 330 ng/mL.

Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS).

CPT Codes

84260
LOINC:  2939-7

Contacts

Last Updated

2/20/2025