VMA, Urine (24 Hour)

SIM

12690 

CPT

84585 

Synonyms

Vanillylmandelic Acid, 24-Hour Urine; 3-Methoxy-4-Hydroxymandelic acid 

Specimen Type

Urine 24-hour 

Container

24-Hour plastic urine container with no preservative---or 6N HCl is acceptable

Collection Instructions

Instruct the patient to void at 8 A.M. and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8A.M. the next morning) Container must be labeled with patient name, date and time collection started and date and time collection finished. Refrigerate during the collection. Screw lid on securely.

Volume

Volume: 30 ml aliquot 
Min. volume: 1 ml. aliquot 
These are the volumes sent to Lab Corp 

Additional Information

Diagnose pheochromocytoma, VMA is of value for evaluation of hypertension.

Patient Preparation

Patient should avoid salicylates, caffeine, phenothiazine and antihypertension agents 
Also coffee ,tea, chocolate ,fruit for 72 hours prior to collection. 

Specimen Processing Instructions

Mix  urine well. Measure and aliquot the 24 hour urine. Write the total  24 hour volume on the aliquot container.

Transport Requirements

Refrigerate

Specimen Stability

 Refrigerated: 14 days 

Rejection Criteria

Boric acid used as a preservative. 

Reference Range

Reference range accompanies report

Critical Value

Test Includes

Vanillylmandelic Acid 

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS) 

Testing Frequency

LCA

004143 

Reviewed By

Lisa McBride                 

Reviewed Date

2/19/2018

Supplemental

* Denotes Reference Lab Test