Department of Laboratory Medicine
Test Directory

[ Test Name Index ]

[ Home & References ]

Metanephrines, fractionated, timed urine w/creatinine

Lab Section:  Sendout Reference  
Lab Location:  Sendout
Reference Lab: Mayo 
Test ID: LAB2339 
Methodology: Liquid Chromatography/Tandem Mass Spectrometry
Schedule: Daily
Reported: 7 days
Specimen Requirements:  Collection: 6.0 mL Urine in a 24 Hr Urine Container.
Pediatric volume: 2 mL.
After urine collection, add 25 mL 6N HCl to maintain a pH below 3. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Record 24-hour urine volume and patient's age on test request form and urine vial.
Frozen unpreserved 24-hour urine also acceptable.
Transport: Preserved: Room temperature Unpreserved: Frozen.
Handling: It is preferable for the patient to be off medications for three days prior to collection. Patient should avoid tobacco, tea, coffee, for three days prior to specimen collection. Common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference. Medications which are alpha agonists (Aldomet), alpha blockers (Dibenzyline) should be avoided 18-24 hours prior to specimen collection.
Stability: Room temperature: 7 days Refrigerated: 8 days Frozen: 30 days


Performing lab: Quest Diagnostics Nichols Institute 14225 Newbrook Drive Chantilly, VA 20153

Reference Interval:  See patient report or consult reference laboratory website.
CPT Code(s): 83835
Last Changed: 11/18/2016 09:36:10
Last Reviewed: 12/27/2016 00:45:56