Laboratory Test Information Guide

Details for Homovanillic Acid, Urine

Test Name: Homovanillic Acid, Urine
Alternate Name(s): HVA
Laboratory: Toxicology/Special Chemistry
Specimen Type: 24-hour urine or random urine. Random urine testing available for pediatric patients only.
Collection Information: 24-Hour Urine Diet and Medication Restrictions: 5-HIAA, Catecholamines, Metanephrines, VMA/HVA

Collection of 24-Hour Urine Sample

For 24-hour urine:
Collect urine over a 24-hour period in a container with 30 mL of 6 N HCl for adult samples or 15 mL of 6 N HCl for pediatric samples.

For random urine:
Obtain a container with 0.5 mL of 6 N HCl from the core laboratory prior to urine collection. Minimum volume of urine required is 1 mL.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Monday – Friday
0800-1600
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
5 days
Stat
2 days
 
Reference Range: Random Urine (µmol/mmol creatinine)
0 - 2 years: ≤ 20.2
2 - 4 years: ≤ 13.6
5 - 9 years: ≤ 9.4
10 - 19 years: ≤ 7.9
> 19 years: ≤ 4.7

24-hour Urine (µmol/day)
0 - 2 years: ≤ 15.4
2 - 4 years: ≤ 25.8
5 - 9 years: ≤ 29.6
10 - 19 years: ≤ 39.5
> 19 years: ≤ 45.6
Effective Date: 2017-07-04
Revised Date: 2018-05-22
Critical Value:  
Interpretive Comments: 
Special Processing: For 24-hour urine collections, transfer an aliquot of the measured urine to a 5-mL Greiner tube.
Comments: VHHU24 (for 24-hour urine; includes VMA and HVA) or HVAR (for random urine; includes VMA and HVA)

Orders for VMA and HVA are coupled so that the levels of both analytes are measured and reported for each sample.

For STAT requests, please call the toxicology lab at ext. 64664 to make arrangements.
Method of Analysis: LC-MS/MS
Critical Information Required:  
Storage & Shipment: Keep samples refrigerated.
System Codes: 
Cerner
See Comments
 
Referred To:  

Questions? Comments? Contact Laura Gopaul