Metanephrines, Fractionated, Free
Order Code: METP
Epic Lab Code: LAB3587
Order Form: A-1a Miscellaneous Request or Epic Req
Commercial Mail-out Laboratory
6240 RCP
356-3527
Specimen:
Plasma
Collection Medium:
Pink top tube
Minimum:
Preferred Minimum: 2.5 mL plasma from lavender top (EDTA) tube Pediatric Minimum: 1.1 mL plasma from lavender top (EDTA) tube
Analytic Time:
1 week upon receipt at reference laboratory 4 days upon receipt in reference laboratory
Reference Range:
METANEPHRINE, FREE <0.50 nmol/L NORMETANEPHRINE, FREE <0.90 nmol/L
Comments:
Patients should be relaxed in either a supine or upright position before blood is drawn. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. Overnight fasting is preferred.
Test Limitations:
Proper interpretation of results requires awareness of recent medication/drug history (e.g., antihypertensive agents, alcohol, cocaine) and other pre-analytical factors (e.g., stress, severe congestive heart failure, myocardial infarction) that influence release of catecholamines and metanephrines.
Methodology:
High Performance Liquid Chromatography, Electrochemical Detection
CPT Code:
83835
 
See Additional Information:
Specimens Requiring Immediate Delivery