A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Metanephrines, Fractionated, Free, LC/MS/MS, Plasma
Test CodeAlias/See Also
LAB3260
CPT Codes
<p>83835</p>
Includes
Normetanephrine, Free
Total, Free (MN + NMN)
Preferred Specimen
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.
Specimen Type: Plasma EDTA
Collection Container/Type: Lavender top (EDTA)
Submission Container/Tube: Plastic vial
Specimen Volume: 2.5 mL
Collection Instructions:
- Draw specimen in a pre-chilled EDTA lavender-top Vacutainer®.
- The whole blood sample should be kept on wet ice until centrifuged (preferably at 4° C) to separate the plasma within 2 hours of venipuncture.
- After centrifugation, the plasma should be transferred to a plastic, leak-proof vial and immediately refrigerated.
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.
Minimum Volume
1.5 mL
Instructions
Transport Container
Transport Temperature
Specimen Stability
Room temperature: 4 hours
Refrigerated: 14 days
Frozen: 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Heparinized plasma • Serum • CSF • Urine
Methodology
Chromatography/Tandem Mass Spectrometry
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Report Available
2 days
Limitations
False-positive results have been observed in patients with either chronic kidney disease or hypertension.
Reference Range
Metanephrine, Free | ≤57 pg/mL |
Normetanephrine, Free | ≤148 pg/mL |
Total, Free (MN + NMN) | ≤205 pg/mL |
Clinical Significance
Performing Laboratory
Quest Diagnostics Nichols Institute 14225 Newbrook Drive Chantilly, VA 20153
Last Updated: February 23, 2012