VMA, 24 hour urine

Method Name

Reference Laboratory


VMA; Vanillylmandelic Acid, VMA 24 Hour Urine

Specimen Required

24- hour urine with 25 mL of 6N HCl to maintain pH below 3 during collection. It is preferable for the patient to be off medications for 3 days before specimen collection. However, common antihypertensives cause minimal or no interference. Patient shou

Specimen Minimum Volume

5 mL of a 24 hour urine

Specimen Stability Information

specimen is stable for 10 days at room temperature.

Performing Laboratory

as ordered. Turn around time is approximately 3-5 days.

Reference Values

by report