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Homovanillic Acid, 24 hour urine

Item Value
Approval req'd? No
Available Stat? No
Test code HVA
Test group Homovanillic
Performed by Quest
Sendout? Yes
Method HPLC, ECD
Patient Preparation Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise and discontinue at least 2 weeks prior to testing any treatment with L-DOPA, which interferes in the assay.
Collection Instructions Refrigerate container during collection.
Container type 24 hour urine collection container

Click here for Urine Preservative Requirements
Amount to Collect Entire 24 hour urine output
Sample type 24 hour urine collection
Preferred volume 10 mL urine
Min. Volume 5 mL urine
UCSF Rejection Criteria Container not refrigerated during collection.
Processing notes Refrigerate a 10 mL aliquot of the well-mixed collection. The final pH should be < 3. Record the total urine volume on the test request and on the aliquot. Order Quest # 1248N
Units mg/24 h
Normal range
3-8 years 0.5-6.7 mg/d
9-12 years 1.1-6.8 mg/d
13-17 years 1.4-7.2 mg/d
> 17 years 1.6-7.5 mg/d
Synonyms HVA
Turn around times Test run Monday-Friday. Turnaround time: 3-6 days.
Additional information To convert mg/d to mmol/d (SI units) multiply by 5.49.

Creatinine is assayed as a measure of completeness of urine collection. If total creatinine excretion is not within normal limits for the patient's age and sex (see entry for Creatinine) and the patient has normal renal function, the urine collection is probably incomplete and the result is invalid.
CPT coding 83150-90
LOINC code 2436-4
Last Updated 3/24/2013 7:49:31 PM
Entry Number 535
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