Test Details

Mnemonic

U5HIR

Ordering Code

1013150

CPT-4 Code(s)

83497

Specimen Information

Patient Preparation

Patients should not eat avocado, banana, butternut, cantaloupe, dates, eggplant, grapefruit, hickory nuts, honeydew, kiwi fruit, melons, nuts, pecans, pineapple, plums, tomatoes, or walnuts for a 48 hour period prior to start and duration of collection. Could result in falsely elevated 5-HIAA excretion. Medications affecting metabolism of serotonin must be avoided at least 72 hours before and during collection. Patients should also avoid coffee, tea and tobacco. Patient should consult their physician before discontinuing any medication.

Collect

Random urine

Specimen Preparation

Add 1-2 drops 6N HCl to a 10.0 mL urine to ensure pH 1-3. Mix well and send in a screw capped plastic urine cup.

Alternate Specimen

Alternate method of collection for random urine specimen without preservative: Send 15.0 mL urine refrigerated in a screw capped plastic urine container.

Minimum Volume

5.0 mL

Transport Temperature

Refrigerated

Stability

With preservative:
Room temperature: 10 days
Refrigerated: 14 days
Frozen: 1 year

Without preservative:
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 14 days

Methodology

High Performance Liquid Chromatography
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Reference Range

<10 mg/G creatinine
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Performing Laboratory

Warde Medical Laboratory
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