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Oxycodone screen, urine (New test)
|Test Update Information||Effective 02/25/2013, the oxycodone immunoassay screen will be carried out in-house by Parnassus Chemistry using the same methodology as Quest Diagnostics.|
|Performed by||Parnassus Chemistry|
|In House Availability||Test available 24 hours per day 7 days per week|
|Method||Enzyme immunoassay method using DRI technology (Beckman UniCel DxC 800 analyzer)|
|Container type||Urine cup|
|Amount to Collect||10 mL urine|
|Sample type||Random urine|
|Preferred volume||1 mL urine|
|Min. Volume||0.5 mL urine|
(Note: a negative result indicates that oxycodone is not present, or it is present at a concentration below the cut-off concentration of 100 µg/L)
|Synonyms||OxyContin; Percocet; Percodan; Oxymorphone; Opana; Numorphan; Numorphone,|
|Stability||Refrigerated 1 week, frozen 1 month|
|Turn around times||
|Additional information||This assay detects both oxycodone and oxymorphone. Oxymorphone is the principal active metabolite of oxycodone, and a prescription drug in its own right (Baselt RC and Stewart CB, Determination of oxycodone and a major metabolite in urine by electron-capture GLC. J Anal Toxicol 2(3):107-109, 1978)
For information on opiate metabolism click here
NOTE: The assay is not sensitive in detecting most prescribed opiates such as morphine, codeine, hydrocodone, hydromorphone, or heroin use. The opiate immunoassay screen (OPI) or an opiate confirmation assay (OPIAC) should be ordered to measure these other compounds. Additionally, this oxycodone screen will not detect fentanyl, methadone or mepiridine.
For a list of cross-reacting substances of this assay click here.
A concentration of < 100 µg/L is considered negative by this test. A positive result is ≥ 100 µg/L and indicates presence of oxycodone or oxymorphone. This immunoassay is only a screening test and is not definitive. Results cannot be used for medico-legal purposes.
This is a presumptive screen for possible oxycodone and oxymorphone use within the past 1-3 days. False positive results may occur due to other cross reacting substances, however, positive results are NOT routinely confirmed by a second method. If confirmation of the test result is required, it is the responsibility of the physician to separately order a specific confirmatory test for the drug identified. Samples are held for 7 days. Contact laboratory at x 31667 to request confirmatory testing.
|Last Updated||3/7/2013 9:58:42 AM|
If you have additional questions regarding this test, please call: 415-353-1667