Thiopental and Pentobarbital, Serum or Plasma

CPT: 80345
Print Share

Test Details


  • Pentothal®


Therapeutic drug management


Gas chromatography/flame ionization detection (GC/FID); gas chromatography/nitrogen phosphorus detection (GC/NPD)

Reference Interval

Thiopental: 4.0−60.0 µg/mL; pentobarbital: 1.0−5.0 µg/mL

Specimen Requirements


Serum or plasma


3 mL

Minimum Volume

0.6 mL


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


Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.

Storage Instructions

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

Causes for Rejection

Gel-barrier tubes


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
811158 Thiopental and Metabolite 808060 Thiopental and Metabolite N/A
811158 Thiopental and Metabolite 811159 Thiopental (Pentothal Sodium) ug/ml 4050-1
811158 Thiopental and Metabolite 811160 Pentobarbital (Nembutal) ug/ml 3924-8

For Providers

Please login to order a test.


© 2018  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, 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 Additional information regarding LOINC® codes can be found at, including the LOINC Manual, which can be downloaded at