Monitor patient adherence.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Gray (sodium fluoride/potassium oxalate). Also acceptable: Plain red, green (sodium heparin), lavender (EDTA), or pink (K2EDTA).
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Separator tubes. Plasma or whole blood collected in lt. blue (sodium citrate). Hemolyzed specimens.
After separation from cells: Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 3 years (Avoid repeated freeze/thaw cycles)
Effective August 17, 2015
|Drugs Covered||Cutoff Concentrations|
|Norpropoxyphene (qualitative only)||10 ng/mL|
Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Positive cutoff: 10 ng/mL.
For medical purposes only; not valid for forensic use.
The absence of expected drug(s) and/or drug metabolite(s) may indicate non-compliance, inappropriate timing of specimen collection relative to drug administration, poor drug absorption, or limitations of testing. The concentration value must be greater than or equal to the cutoff to be reported as positive. Norpropoxyphene is reported as qualitative only. Interpretive questions should be directed to the laboratory.
Laboratory Developed Test (LDT)
80367 (Alt code: G0480)
|Component Test Code*||Component Chart Name||LOINC|
|2010466||Propoxyphene, S/P, Quant||3543-6|
|2010467||Norpropoxyphene, S/P, Qual||3870-3|