Metanephrines, Plasma (Free) METPL

Method(s) High Performance Liquid Chromatography
Specimen Required
Collect

Two 3 mL lavender (EDTA) cap tubes. Also acceptable: One pink (K2EDTA) cap tube.

Transport

2 mL plasma, frozen. (Min: 1 mL) CRITICAL FROZEN.

Remarks

CRITICAL FROZEN. Centrifuge within 1 hour of collection. Remove plasma from cells and freeze immediately.

Stability After separation from cells: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 month
Unacceptable Conditions

Plasma separator tubes, body fluids other than EDTA or heparinized plasma; non-frozen specimens.

Schedule Daily
Billing Code 5010210
CPTCode 83835
Notes

Patient Preparation: 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.

Preferred Specimen Collection Device(s)
Reference Interval

Normetanephrine: 0.0-0.89 nmol/L
Metanephrine: 0.0-0.49 nmol/L

No Appointment Necessary
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12 Patient Service Centers in Central New York.

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