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Lab Test Dictionary

Homovanillic Acid (HVA), 24-Hour Urine w/Creatinine (39527)

Methodology

High Performance Liquid Chromatography (HPLC); Electrochemical Detection


Synonyms

HVA

Specimen Type

Urine, Timed Collection

Performing Lab

Quest Diagnostics San Juan Capistrano


Epic ID

LAB4218

Lab Test Days

Tuesday and Friday

Standard TAT

3-7Days


Collection Information

Specimen Required

5-10 mL 24 Hour Urine

Container Type

Sterile Container

Collection Instructions

It is preferable for the patient to be off medications for three days prior to collection. However, common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference. Patient should avoid alcohol, coffee, tea, tobacco, and strenuous exercise prior to collection. Store refrigerated during collection.


Processing Information - Lab Use Only

Transport Temperature

Refrigerate-OK/Frozen-OK/Ambient-OK

Specimen Stability

Room Temp=10 Days; Refrigerated=14 Days; Frozen=90 Days

Rejection Criteria

Preserved urine received refrigerated with pH >3; Unpreserved urine received frozen with pH >6

Test Volume Required

10 mL 24 Hour Urine

Minimum Test Volume

5 mL 24 Hour Urine

Processing Instructions

pH adjusted to <3.0 using 6N HCI. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Indicate total volume and pH in comments, on specimen and on batch sheet.


CPT Codes

82570, 83150


Revised

11-16-20

Initials

SL