CDAU7 - Performance: Drug Abuse Survey with Confirmation, Panel 9, Urine

Test Catalog

Test Name

Test ID: CDAU7    
Drug Abuse Survey with Confirmation, Panel 9, Urine

Method Description Describes how the test is performed and provides a method-specific reference

The amphetamines, barbiturates, benzodiazepines, cocaine, methadone metabolite, opiates, phencyclidine, and tetrahydrocannabinol metabolite assays are based on the kinetic interaction of microparticles in a solution (KIMS) as measured by changes in light transmission. In the absence of sample drug, soluble drug conjugates bind to antibody-bound microparticles, causing the formation of particle aggregates. As the aggregation reaction proceeds in the absence of sample drug, the absorbance increases. When a urine sample contains the drug in question, this drug competes with the drug derivative conjugate for microparticle-bound antibody. Antibody bound to sample drug is no longer available to promote particle aggregation, and subsequent particle lattice formation is inhibited. The presence of sample drug diminishes the increasing absorbance in proportion to the concentration of drug in the sample. Sample drug content is determined relative to the value obtained for a known cutoff concentration of drug.



Ethyl alcohol + NAD+      ----------------->   acetaldehyde + NADH + H+


The NADH formed during the reaction, measured photometrically as a rate of change in absorbance, is directly proportional to the ethyl alcohol concentration.(Package insert: Roche Amphetamines, Barbiturates, Cannabinoids, Benzodiazepines, Cocaine, Ethanol, Opiates, Phencyclidine, Methadone Metabolite reagents, Roche Diagnostic Corp, Indianapolis, IN)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

Same day/1 day

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result

2 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

2 weeks

Performing Laboratory Location The location of the laboratory that performs the test