- 3MT
3-Methoxytyramine, 24 Hour, Urine
Specimen:
Test Code
3MT
Specimen Name
3-Methoxytyramine, 24 Hour, Urine
Collect
24 hour urine
Submit
10 mLs (Min: 3 mLs) in urine cup
Special Handling
—
Rejection Criteria
Grossly hemolyzed or icteric specimens
Stability
Refrigerated 28 days
Methodology
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Performed
Monday - Friday
Reported
3-5 days
CPT Codes
- 82542
Components
—
Additional Information
Must Include: Collection Start-DateTime, Stop-DateTime and Total Volume. Tricyclic antidepressants, labetalol, and sotalol medications may elevate levels of catecholamines producing results that cannot be interpreted. If clinically feasible, it is optimal to discontinue these medications at least 1 week before collection. Levodopa (Sinemet) medication will cause false-positive results. For advice on assessing the risk of removing patients from these medications and alternatives, consider consultation with a specialist in endocrinology or hypertension.
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Common Lab Definitions
- Serum
- Plasma
- STT