Test Catalog

Test

Code
E840
Name
METANEPHRINES PLASMA (FREE)
Description

Alternative Names: METP, 37524, E840
Includes: Normetanephrine, Metanephrine, Metanephrines Interpretation
Sample Type: Plasma
Preferred Container: EDTA (Lavender Top) Tube, Sodium Heparin (Green Top) Tube or Lithium Heparin (Green Top) Tube
Sample Volume: 2.0 mL
Minimum Volume: 1.0 mL
Handling Instructions: Centrifuge within 1 hour. Transfer 2 mL plasma to a Standard Transport Tube and freeze immediately. Avoid hemolysis.
Transport Temperature: Critical Frozen
Specimen Stability: After separation from cells: Ambient: 3 Days; Refrigerated:10 Days; Frozen:1 month
Testing Frequency: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Expected Turn Around Time: 3 – 5 Days
Testing Facility: ARUP
CPT Codes: 83835
Note: Drugs and medications may affect results and should be discontinued for at least 72 hours prior to specimen collection, if possible. Collection of the specimen after the patient has rested for 15 minutes in a supine position is recommended. Isoetharine, isoproterenol, 3,4-methylenedioxyamphetamine (MDA), and 3,4-methylenedioxymethamphetamine (MDMA) are known to interfere in this test.
Many drugs/medications, including over-the-counter and herbal products, can interfere with test results. Testing for all potential interactions is not possible. If the patient is taking a drug not listed as an interferent, its potential effect on test results is unknown. If test results are inconsistent with clinical evidence, drug interference should be considered. If appropriate, the patient should discontinue the potential interferent for 48-72 hours and a new sample collected for retesting.