Vanillylmandellic Acid (VMA) LC-MS/MS, 24hr Urine

Specimen Type

Containers

Collection Containers

Volume

Sample Volume

10 mL

Patient Preparation

The following foods and medications should be avoided for three (3) days prior to the collection of urine, and during the collection of the sample:
Foods containing high caffeine concentrations (e.g. coffee, tea, cocoa, chocolate, caffeinated beverages, foods containing high amine concentrations (e.g. bananas, avocados, cheese, walnuts, alcohol, fruit and juices) and foods containing vanilla can increase urinary HVA/VMA excretion. Essential hypertension, intense anxiety and intense physical exercise can also result in raised HVA/VMA excretion.
Medications and drugs such as Salicylate, Histamine, Acetaminophen, Levodopa, Ajmaline, Lithium, Epinephrine, Nitroglycerin, Glucagon, Rauwolfia Alkaloids and Guanethidine can increase HVA/VMA.
Contact your physician for approval before discontinuing any prescription medication. Be sure to discuss all non-prescription medications with your physician.

Collection & Handling

Collection Instructions

24-hour urine collected in a polyethylene container with 25 mL 6N Hydrochloric Acid. It is important that the urine is refrigerated during the collection. The pH of the urine must be between 2-4.
15 mL 6N HCl is recommended for children less than 5 years old.

Handling Information

The final pH must be maintained from 2 – 4.

Additional Information

Provide 24 hour volume and date of collection.

Stability