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Lab Test Dictionary

5-HIAA (5-Hydroxyindoleacetic Acid), 24-Hour Urine (39625X)

Methodology

High Performance Liquid Chromatography (HPLC)


Specimen Type

Urine, Timed Collection

Performing Lab

Quest Diagnostics San Juan Capistrano


Epic ID

LAB01242

Lab Test Days

Tuesday, Thursday, Friday

Standard TAT

5-9 Days


Collection Information

Specimen Required

5-10 mL 24 Hour Urine

Container Type

24-Hour Urine Container

Collection Instructions

Patient should avoid food high in indoles: avocados, banana, tomato, plum, walnut, pineapple, and eggplant. Patient should also avoid tobacco, tea and coffee three days prior to specimen collection. Collect 24 hour urine with 25 mL of 6N HCl to maintain a pH below 3. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Keep urine refrigerated during collection if preservative is not used.


Processing Information - Lab Use Only

Transport Temperature

Refrigerate-OK/Frozen-OK/Ambient-OK

Specimen Stability

Room Temp: 7 Days; Refrigerated: 30 Days; Frozen: 30 Days

Test Volume Required

10 mL 24 Hour Urine

Minimum Test Volume

5 mL 24 Hour Urine

Processing Instructions

Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Keep urine refrigerated during collection if preservative is not used. Record 24 hour urine volume in comments, on specimen and batch sheet.


Included Tests

Creatinine


CPT Codes

83497, 82570


Revised

06-05-16

Initials

SL