Barbiturates - Confirmation - Meconium
Ordering Recommendation
Quantitative Gas Chromatography-Mass Spectrometry/Quantitative Liquid Chromatography-Tandem Mass Spectrometry/Qualitative Liquid Chromatography/Time of Flight Mass Spectrometry
1-4 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
All meconium (blackish material) excreted until milk/formula based stool (yellow-green) appears.  
Specimen Preparation
Transport 1 g (equivalent to 1/2 inch cube) for each separate confirmation required. (Min: 0.5 g or 1/4 inch cube)  
Storage/Transport Temperature
Room temperature.  
Unacceptable Conditions
Ambient: 1 week; Refrigerated: 3 months; Frozen: 1 year  
Reference Interval
Interpretive Data
Methodology: GC/MS, LC-MS/MS, and/or LC-TOF/MS

Drugs covered:
butalbital and phenobarbital.

Positive cutoff:
50 ng/g

Meconium begins to form between the 12th and 16th week of gestation. Meconium drug testing can detect maternal drug use during the last 4 to 5 months of pregnancy. A negative result does not exclude the possibility that a mother used drugs during pregnancy. Detection of drug use depends on the quantity and quality of the specimen tested as well as the pattern and frequency of drug(s) used by mother. The concentration value must be greater than or equal to the cutoff to be reported as positive. Interpretive questions should be directed to the laboratory.

For medical purposes only; not valid for forensic use.

Compliance Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
CPT Code(s)
80345; (Alt code: G6043)
Component Test Code*Component Chart NameLOINC
0092311Drug Confirmation, Barbiturates, Mec38439-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
  • Amobarbital
  • Amobarbitone
  • Amytal
  • Axocet
  • Butalbital
  • Fioricet
  • Fiorinal
  • Luminal
  • Nembutal
  • Pentobarbital
  • Phenobarbital
  • Phenobarbitone
  • Quinalbartbitone
  • Sandoptal
  • Secobarbital
  • Seconal
  • Solfoton
  • Tuinal