Tramadol and o-desmethyl tramadol
High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)
Specimen requirements | |
|---|---|
| Patient preparation | None Specified |
| Preferred specimen(s) | 1 mL serum serum collected in a red-top tube (no gel) |
| Alternative specimen(s) | Plasma |
| Minimum volume | 0.45 mL |
| Collection instructions | Peak serum levels are recommended when monitoring patients because the level in the blood drops so rapidly that many negative results are found at the trough. The peak occurs at 40 to 90 minutes post dose. Promptly centrifuge and separate serum or plasma into a plastic screw-cap vial. |
| Transport container | Transport tube |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 14 days Refrigerated: 14 days Frozen: 11 months |
| Reject criteria | Serum separator tube (SST) or PST |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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