Laboratory: Clinical Biochemistry  (METABOLIC)
Test Name:
5 - HYDROXYINDOLEACETIC ACID (5-HIAA) - (U)
Test Code: HIAA
Clinical Information:
Clinical Information; 
Include: 
Patient Preparation Instructions:  Patient should avoid food high in indoles:  avocados, banana, tomato, plum, walnut, pineapple, and eggplant.  Over-the-counter intake of tryptophan or 5-hydroxytryptophan will also produce elevated urine HIAA.  Patient should also avoid tobacco, tea and coffee for three days prior to specimen collected.
Collection Devices:
Specimen Required:
Urine: 10.0 mL
Pediatric Urine: 5.0 mL
Referral:
Requisition:
Reference Values:
< 5 μmol/mmol creatinine
Availability:
Within 2 Weeks
See Also:
More Information:
Performed at Health Sciences Centre by Shared Health  Biochemical Genetics Laboratory using UPLC/MS/MS.  This is a laboratory developed test.