- 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) Urine Refrigerated
Special Handling
Must Include: Collection Start-DateTime, Stop-DateTime and Total Volume. From a well-mixed 24-hour collection transfer 10 mLs urine to standard transport tubes. (Min: 3 mLs)
Rejection Criteria
Grossly hemolyzed or icteric specimens
Stability
Ambient 21 days; Refrigerated 28 days; Frozen 28 days
Methodology
Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Performed
Monday - Friday
Reported
5-7 days
CPT Codes
- 82542
Components
—
Additional Information
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