Metanephrines, Fractionated, Quantitative, 24-Hour Urine
Test Code: 004234
Performing Lab: LabCorp
CPT Code: 83835 001
Specimen Type
Urine (24-hour)
Specimen Container
Plastic urine container with no preservative or 6N HCl.
Volume
10 mL aliquot
Minimum Volume
2.5 mL aliquot (NOTE: This volume does NOT allow for repeat testing.)
Specimen Handling
Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely. Label container with patient's name, date and time collection started, and date and time collection finished. Measure and record total 24-hour volume. Mix well; send aliquot. (HCl is an acceptable preservative if required for a concurrently collected assay. PeopleSoft item number for this container is *21584.)
Patient Prep
No caffeine before or during collection. Monamine oxidase inhibitors should be discontinued at least one week prior to beginning collection.
Temperature
Room Temperature
Methodology
Liquid chromatography/tandem mass spectrometry (LC/MS-MS)
Stability
Room Temperature: 14 days
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
| Result Code | Result Name | LOINC |
|---|---|---|
| 004240 | Normetanephrine, Ur | 21422-1 |
| 004248 | Normetanephr.,U,24h | 2671-6 |
| 004239 | Metanephrine, Ur | 21019-5 |
| 004249 | Metanephrine, U,24hr | 19049-6 |
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