Last Modified:
12/21/2022 8:54:28 AM
Medical Necessity Documentation:
Client Notes:
Patient Preparation:
Specimen Requirements:
20 mL random urine collected in a clinical drug test transport vial.
Collection Instructions:
Minimum Volume:
5 mL
Transport & Storage: Temperature/Stability:
Transport at room temperature.
Stability ambient 5 days; refrigerated 14 days; frozen 30 days
Rejection Criteria:
Preserved samples
Reference Range:
See laboratory report.
Critical Ranges:
Test Comments:
Methodology:
Chromatography / Mass Spectrometry
Clinical Significance:
This test measures the ration of the d and L isomers of methamphetamine in urine. Methamphetamine isomers are biomarkers to identifywhich forms of methamphetamine are present. The test is a definitive drug assay using the liquid chromatography/mass spectrometry (LC/MS-MS) method of analysis. Methamphetamine is a stimulant drug of abuse as well as a prescription drug used to treat attention deficit hyperactivity disorder (ADHD) and obesity. Methamphetamine has two isomer forms, D and L. The L isomer is used in over-the-counter nasal decongestant products and is also a metabolite of the drug selegiline. The D isomer is used for prescription methamphetamine and is also a metabolite of the drug benzphetamine. Illicit methamphetamine formulations are primarily the D form. Approximately 62% of an oral dose is excreted with ~33% as unchanged drug and ~66% metabolites (including amphetamine)
Documentation:
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
3 days
Days Performed:
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Departments:
Sites Performed:
Quest - Chantilly
PHL Test Code:
MAMPU
EPIC Test Code:
LAB3225
Send Out Test Code:
39413
Included Tests:
CPT Coding:
80374
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