Laboratory Test Detail

Last Updated: November 20, 2019 @ 10:13 am

91144

Metanephrines, Plasma

Specimen:Collect:
  • One Lavender (EDTA)

Also Acceptable:
  • One Green Top (Li Heparin)
  • One Green Top (Na Heparin)
  • One Pink Top (EDTA)
Submit:
  • 2 mL (Min:1 mL) Plasma . Submit Frozen. Submit in a Standard Transport Tube.
Special Handling:
  • Critical Frozen
  • Fasting Specimen is Preferred
  • Separate aliquot required for each frozen test ordered
  • Separate from cells ASAP
  • Immediately place sample in wet ice bath.
    Centrifuge within 30 minutes of collection, remove plasma and freeze.
    Patient preparation: Discontinue epinephrine and epinephrine-like drugs at least one week prior to collection. Patient must refrain from taking acetaminophen for 48 hrs prior to collection. Patient must refrain from using caffeine, tobacco, medications, or alcoholic beverages 4 hours prior to collection.
    Collect sample after patient has been resting in supine position for 15 minutes.
    Overnight fasting is recommended.
Rejection Criteria:
  • Grossly Hemolyzed Samples
  • Specimen submitted at room temperature
  • Specimen submitted refrigerated
Stability:Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 1 Month(s); Incubated: Unacceptable
Methodology:
  • Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed:Sun-Sat
Reported:3-5 Day(s)
CPT Codes:
  • 83835
Interpretive Data:Please see report for interpretive data.
Components:
  • 93533 - METANEPHRINE
  • 93534 - NORMETANEPHRINE
  • 93512 - INTERPRETATION
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