Test Details

Mnemonic

METPQ

Ordering Code

3421900

CPT-4 Code(s)

83835

Specimen Information

Patient Preparation

Patient 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.

Collect

Lavender EDTA (pre-chilled)

Specimen Preparation

Sample should be kept on wet ice until centrifugation (use refrigerated centrifuge if possible). Centrifuge and separate the plasma from the cells within 2 hours of collection. Send 2.5 mL plasma in a screw capped plastic vial.

Minimum Volume

1.5 mL

Transport Temperature

Refrigerated

Rejection Criteria

Hemolysis, serum, CSF, urine

Stability

Room temperature: 4 hours
Refrigerated: 14 days
Frozen: 14 days

Methodology

Liquid Chromatography/Tandem Mass Spectrometry
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Reference Range

Metanephrine, Plasma Free: ≤57 pg/mL
Normetanephrine, Plasma Free: ≤148 pg/mL
Total, Plasma Free: ≤205 pg/mL
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Performing Laboratory

Quest SJC
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