5-HIAA, plasma-994

Test info

  
5-HIAA, plasma
  
994
  
LAB994
  
MSO
  
5HIAA
5-hydroxyindoleacetic acid
  

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.

Specimen

  

Patient should avoid consumption of bananas, avocados, plums, eggplant, tomatoes, plantain, pineapple, walnuts, and interfering drugs for a 72-hour period prior to and during collection.

  
Heparin plasma
  

Dk green heparin (Li or Na), no gel

 

  
1.0 mL
  
0.5 mL
  

Immediately following collection, mix sample by inverting 8 - 10 times to prevent clotting

  
  1. Spin within 45 minutes of sample collection
  2. Transfer plasma to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp), labelled as the appropriate Heparin plasma type
  3. Freeze

 

 

  
EDTA plasma
  
  
  1. Spin within 45 minutes of sample collection
  2. Transfer plasma to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp) labelled as EDTA plasma 
  3. Freeze
  

Frozen (preferred) - 14 days

   Freeze/thaw cycles - stable x 6

Ambient - 3 days

Refrigerated - 3 days

 

  
  • Gross hemolysis

Performance

  
Esoterix Endocrinology via LabCorp (504510): R-NX
  
Mo
  
16 days
  

High-pressure liquid chromatography (HPLC)/tandem mass spectrometry

Clinical and Interpretive info

  

<22 ng/mL

Billing

  
83497
  
Result 1693-1

Tracking

  
06/26/2019
  
10/20/2023
  
10/20/2023