Test directory: Metanephrines, Fractionated, Free

Ordering Code4137
Test NameMetanephrines, Fractionated, Free
Alias(Contains: Total Metanephrines, Free Metanephrines,
Normetanephrines, Free)
Preferred SpecimenPlasma
Preferred ContainerEDTA, K2 (Lavender)
Optimum Volume2.5 mL
Collection InstructionsPatient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. Overnight fasting is preferred. Patients should be relaxed in either a supine or upright position before blood is drawn.
Handling InstructionsDraw specimen in a pre-chilled EDTA lavender-top Vacutainer
The whole blood sample should be kept on wet ice until centrifuged (preferable at 4 degrees C) to separate, the plasma within 2 hours of venipuncture.
Transport RequirementsOahu: Refrigerated
Airline: Refrigerated
Specimen StabilityAmbient: Not Stable
Refrigerated: 14 Days
Frozen: 14 Days
Rejection CriteriaHeparinized plasma, Serum
Avail. StatNO
Analytic TimeUp to 7 Days
MethodologyLiquid Chromatography Tandem Mass Spectrometry
Reference Lab Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of November 21, 2024.
ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Metanephrine, FreeALLSee report.
Normetanephrine, FreeALLSee report.
Total, Free (MN + NMN)ALLSee report.