Preferred meconium test to detect and document maternal drug use during pregnancy approximately the last trimester of a full-term birth. Targeted single-drug class testing is appropriate if only a particular drug class or classes are of clinical interest, or when quantity of meconium available for testing is very small (eg <1g).
- Patient Preparation
- Meconium. All meconium (blackish material) excreted until milk/formula based stool (yellow-green) appears.
- Specimen Preparation
- Storage/Transport Temperature
- All meconium available (4 g is preferred) at 20-25°C. (Min: 2 g or 3/4 inch cube on each side)
- Unacceptable Conditions
- Ambient: 1 week; Refrigerated: 3 months; Frozen: 1 year
|Drugs Covered and Cutoff Concentrations|
|Amphetamines||30 ng/g||20 ng/g|
|Barbiturates||75 ng/g||50 ng/g|
|Benzodiazepines||75 ng/g||20 ng/g|
|Buprenorphine||40 ng/g||20 ng/g|
|Cocaine||30 ng/g||20 ng/g|
|Marijuana||30 ng/g||5 ng/g|
|Methadone||40 ng/g||10 ng/g|
|Opiates||30 ng/g||20 ng/g|
|Phencyclidine||15 ng/g||10 ng/g|
The concentration at which the screening test can detect a drug or metabolite varies within a drug class. The concentration value must be greater than or equal to the cutoff to be reported as positive.
For medical purposes only; not valid for forensic use.
Unless ARUP is otherwise notified, reflex confirmation testing will be performed in the following order of priority:
Amphetamines (0.125 g sample required)
Cocaine (0.5 g sample required)
Opiates (0.125 g required)
Buprenorphine (0.125 g required)
Marijuana (0.125 g required)
Benzodiazepines (0.5 g sample required)
Methadone (0.125 g sample required)
Phencyclidine - PCP (0.5 g sample required)
Barbiturates (0.5 g sample required)
|Component Test Code*||Component Chart Name||LOINC|
- Pain Management