Stanford Hospital & Clinics and Lucile Packard Children’s Hospital
Test Name : Metanephrines, Fractionated, 24-Hour Urine Order Code : YUMETF
Note: This is a Sendout/Referred Test and is only offered to registered patients of SHC or LPCH.
Synonyms: Pheochromocytoma
Specimen Type: 24 Hour Urine Collection Container
Container Type: Timed urine collection container
Required Volume: 10 mL Urine Aliquot of a well mixed measured 24 hour urine specimen Aliquot tube or submit entire container
Minimum Volume (Pediatric): 2 mL
Methodology: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) Stable Isotope Dilution Analysis
Components: Metanephrines, Normetanephrines
Standard Run Times: Mon-Sat 12pm
Turnaround Time: 4 days
Special Handling: Send Refrigerated 10 mL from a 24-hour urine collection. Add 10 g (pediatric: 3 g) of boric acid or 25 mL (pediatric: 15 mL) of 50% acetic acid as preservative at start of collection. See "Urine Preservatives" in Special Instructions for multiple collections. 24-Hour volume is required. Tricyclic antidepressants, labetalol, and sotalol medications may elevate levels of metanephrines producing results which cannot be interpreted. If clinically feasible, it is optimal to discontinue these medications at least 1 week before collection. For advice on assessing the risk of removing patients from these medications and alternatives, you may consider consultation with a specialist in endocrinology or hypertension. (IF NO PRESERVATIVE ADDED, REFRIGERATE CONTAINER THROUGHOUT THE ENTIRE PROCESS OF COLLECTION, AND SEND THE ALIQUOT SPECIMEN FROZEN)
CPT Codes: 83835
Department: Sendouts
Clinical Specialties: Endocrinology
Sendout Lab: Mayo Medical Laboratories