ARUP's Laboratory Test Directory

Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma : 0090676

Mnemonic: CANNAB SP

Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed: Sun-Sat
Reported: 1-4 days
Specimen Required: Collect: Gray (sodium fluoride/potassium oxalate). Also acceptable: Plain red, green (sodium heparin), lavender (EDTA), or pink (K2EDTA).

Specimen Preparation: Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 4 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 2 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Separator tubes. Plasma or whole blood collected in lt. blue (sodium citrate). Specimens exposed to repeated freeze/thaw cycles.

Stability (collection to initiation of testing): After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years
Interpretive Data: Drugs covered: 9-carboxy-THC

Methodology: Liquid Chromatography-Tandem Mass Spectrometry

Positive cutoff: 5 ng/mL

The drug analyte detected in this assay, 9-carboxy THC, is a metabolite of delta-9-tetrahydrocannabinol (THC). Detection of 9-carboxy THC suggests use of, or exposure to, a product containing THC. This test cannot distinguish between prescribed or non-prescribed forms of THC, nor can it distinguish between active or passive use. The plasma half-life for 9-carboxy THC metabolite is estimated to range from 4-12 hours.

For medical purposes only; not valid for forensic use.

See Compliance Statement B: www.aruplab.com/CS
CPT Code(s): 82542
Cross References: 9-Carboxy-THC (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma) , Cannabinoids (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma) , Cannabis (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma), Dronabinol (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma) , Marijuana (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma) , Marinol (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma), Pain Management (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma) , THC (Drugs of Abuse Confirmation/Quantitation - Cannabinoids (9-carboxy-THC) - Serum or Plasma)