Metanephrines (free), Plasma (Metanephrine and Normetanephrine)

Specimen Container	EDTA Tubes
Specimen Requirement	3 mL EDTA Recommended collection: Draw from fasting patient at supine position after 20 min - 30 min of rest.
Specimen Storage/Transport	Keep cold with ice and send immediately to the laboratory.
Orderable as Urgent?	No
Turn Around Time	Mean = 7 days, Range: 3 - 11 days
Testing Laboratory Location	SGH
Laboratory	Biochemistry
Contact Number	6394 1352
Day and Time Performed	Mon - Fri: 0800 hrs - 1700 hrs Test setup every Wednesday
Orderable on CPOE?	No
Downtime Form	Clinical Chemistry - Form A
Additional Information	Patient Preparation: Subjects should abstain from caffeine, acetoaminophen, before testing. The following drugs: (on MET, NMET, MTY) isoproterenol, ephedrine, (on MTY) metamphetamine also interferes with the analysis technique.

Change History Notes

Last Updated - 22 Jul 2025

Metanephrines (Free), Plasma (Metanephrine and Normetanephrine)