Ephedrine/Pseudoephedrine Differentiation, Serum or Plasma

TEST: 808162
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CPT: 80324
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Synonyms

  • White Cross

Test Includes

Ephedrine; pseudoephedrine

Expected Turnaround Time

10 - 14 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Documents

Specimen Requirements

Specimen

Serum or plasma, protected from light

Volume

3 mL

Minimum Volume

0.6 mL

Container

Red-top tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.

Collection

Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube. Wrap specimen in foil to protect from light.

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen. Protect from light.

Patient Preparation

Trough levels are most reproducible.

Causes for Rejection

Gel-barrier tubes; specimen not light-protected

Test Details

Use

Detect, quantitate, and differentiate between the stereoisomers ephedrine and pseudoephedrine.

Methodology

Gas chromatography/electron capture detection (GC/EC)

Reference Interval

Ephedrine: 35−80 ng/mL; pseudoephedrine: 200−800 ng/mL

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
808162 Ephedrine/Pseudoephedrine 808163 Ephedrine ng/ml 3591-5
808162 Ephedrine/Pseudoephedrine 808164 Pseudoephedrine ng/ml 9389-8

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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf