Casandra
Casandra Test Code QD89667Version 1 (DRAFT)
Performing Lab
Lab Quest DiagnosticsLab Test ID 39625
5-Hydroxyindoleacetic Acid (5-HIAA), 24-Hour Urine with Creatinine
Clinical Use
Order TestUse
Not provided.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Mass Spectrometry
Biomarkers
5-HIAA
Analyte5-HIAA, Urine
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Creatinine
AnalyteCreatinine, 24‑Hour Urine
Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Urine
Volume
10 mL (5 mL minimum)
Minimum Volume
Not provided
Container
24‑hour urine container
Collection Instructions
Collect 24‑hour urine with 25 mL 6N HCl to maintain a pH below 3. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Record 24‑hour urine volume on test request form and urine vial.
Patient Preparation
Patient should avoid food high in indoles: Avocado, banana, tomato, plum, walnut, pineapple, and eggplant.
Storage Instructions
Keep urine refrigerated during collection if preservative is not used.
Causes for Rejection
pH >3.0 and received unfrozen
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